FreeCalypso > hg > freecalypso-reveng

annotate bootrom.disasm @ 14:3443b1b08af4

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boot ROM re: starting to unravel the serial command handling messed up earlier with some var locations: the darned offsets were decimal
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Wed, 24 Apr 2013 23:49:39 +0000
parents e0ce45f043c0
children 2e3cecd6716c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1 RESET entry and exception vectors:
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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2 0: ea000524 b 0x1498
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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3 4: ea200004 b 0x80001c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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4 8: ea200004 b 0x800020
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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5 c: ea200004 b 0x800024
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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6 10: ea200004 b 0x800028
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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7 14: ea200004 b 0x80002c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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8 18: ea200004 b 0x800030
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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9 1c: ea200004 b 0x800034
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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10
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
11 ; The following routine (starting at 0x20) is used to transfer control
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
12 ; to nCS0 application images that are designed to work with no internal
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
13 ; boot ROM "in the way", i.e., images identified by a 1 in the 0x2000 word.
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
14 ; The present routine is copied to the internal RAM and executed there.
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
15 ;
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
16 ; The routine itself takes one argument in R0 and uses it to set the
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
17 ; nIBOOT override bits in the FFFF:FB10 register. If R0==1, bits <9:8>
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
18 ; of this register are set to 11, putting nCS0 at address 0. If R0==0,
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
19 ; the bits are set to 01, putting the internal ROM at 0. Otherwise,
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
20 ; the bits are set to 00, restoring the nIBOOT pin configuration.
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
21 ; (In actual operation the argument passed to this function is the word
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
22 ; from 0x2000, so it's equal to 1.) Then the routine causes the
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
23 ; watchdog timer to go off, resetting the ARM.
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
24
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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25 20: e24dd004 sub sp, sp, #4 ; 0x4
6
8c2621b2ed37 boot ROM re: further understanding of the external flash image booting
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 5
diff changeset
26 24: e59f20b8 ldr r2, =0xFFFFFB10 ; via 0xe4
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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27 28: e1d2c0b0 ldrh r12, [r2]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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28 2c: e20c10ff and r1, r12, #255 ; 0xff
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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29 30: e20ccb3f and r12, r12, #64512 ; 0xfc00
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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30 34: e181c00c orr r12, r1, r12
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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31 38: e1a0c80c mov r12, r12, lsl #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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32 3c: e1a0c82c mov r12, r12, lsr #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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33 40: e3500001 cmp r0, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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34 44: 0a000005 beq 0x60
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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35 48: e3500000 cmp r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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36 4c: 1a000006 bne 0x6c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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37 50: e38ccc01 orr r12, r12, #256 ; 0x100
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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38 54: e1a0c80c mov r12, r12, lsl #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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39 58: e1a0c82c mov r12, r12, lsr #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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40 5c: ea000002 b 0x6c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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41 60: e38ccc03 orr r12, r12, #768 ; 0x300
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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42 64: e1a0c80c mov r12, r12, lsl #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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43 68: e1a0c82c mov r12, r12, lsr #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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44 6c: e1c2c0b0 strh r12, [r2]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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45 70: e3a0cfc3 mov r12, #780 ; 0x30c
6
8c2621b2ed37 boot ROM re: further understanding of the external flash image booting
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 5
diff changeset
46 74: e59f006c ldr r0, =0x80F5 ; via 0xe8
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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47 78: e10200bc strh r0, [r2, -r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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48 7c: e3a0c000 mov r12, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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49 80: e1cdc0b0 strh r12, [sp]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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50 84: ea000002 b 0x94
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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51 88: e1ddc0b0 ldrh r12, [sp]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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52 8c: e28cc001 add r12, r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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53 90: e1cdc0b0 strh r12, [sp]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
54 94: e1dd10b0 ldrh r1, [sp]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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55 98: e3a0c902 mov r12, #32768 ; 0x8000
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
56 9c: e24ccead sub r12, r12, #2768 ; 0xad0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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57 a0: e151000c cmp r1, r12
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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58 a4: bafffff7 blt 0x88
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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59 a8: e3a0cfc3 mov r12, #780 ; 0x30c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
60 ac: e10200bc strh r0, [r2, -r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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61 b0: e3a0c000 mov r12, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
62 b4: e1cdc0b0 strh r12, [sp]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
63 b8: ea000002 b 0xc8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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64 bc: e1ddc0b0 ldrh r12, [sp]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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65 c0: e28cc001 add r12, r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
66 c4: e1cdc0b0 strh r12, [sp]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
67 c8: e1ddc0b0 ldrh r12, [sp]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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68 cc: e3a00902 mov r0, #32768 ; 0x8000
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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69 d0: e2400ead sub r0, r0, #2768 ; 0xad0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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70 d4: e15c0000 cmp r12, r0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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71 d8: bafffff7 blt 0xbc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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72 dc: e28dd004 add sp, sp, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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73 e0: e12fff1e bx lr
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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74
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
75 ; literal pool for the above routine
6
8c2621b2ed37 boot ROM re: further understanding of the external flash image booting
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 5
diff changeset
76 e4: fffffb10
8c2621b2ed37 boot ROM re: further understanding of the external flash image booting
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 5
diff changeset
77 e8: 000080f5
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
78 ; end of the code copied to the internal RAM for booting type 1 images
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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79
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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80 ec: e92d4010 stmdb sp!, {r4, lr}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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81 f0: e59fcd0c ldr r12, [pc, #3340] ; 0xe04
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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82 f4: e59c4014 ldr r4, [r12, #20]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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83 f8: e59f0d08 ldr r0, [pc, #3336] ; 0xe08
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
84 fc: e5dcc008 ldrb r12, [r12, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
85 100: e790c10c ldr r12, [r0, r12, lsl #2]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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86 104: e28c0005 add r0, r12, #5 ; 0x5
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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87 108: e5d0c000 ldrb r12, [r0]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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88 10c: e31c0040 tst r12, #64 ; 0x40
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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89 110: 0afffffc beq 0x108
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
90 114: eb000513 bl 0x1568 ; IND_CALL
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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91 118: eafffffe b 0x118
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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92
14
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
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93 ; This routine handles the '<i' command - it initializes the vars
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
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94 ; starting at 800518. It is called with R0=0x800518.
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
diff changeset
95
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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96 11c: e3a0c004 mov r12, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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97 120: e5c0c000 strb r12, [r0]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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98 124: e3a0c000 mov r12, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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99 128: e1c0c0be strh r12, [r0, #14]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
100 12c: e1c0c1b0 strh r12, [r0, #16]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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101 130: e580c014 str r12, [r0, #20]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
102 134: e5c0c018 strb r12, [r0, #24]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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103 138: e12fff1e bx lr
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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104
14
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
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105 ; This routine at 0x13c apparently generates the serial response messages
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
diff changeset
106 ; back to the host, using the buffer at 80010C as its scratchpad.
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
diff changeset
107 ; The argument in R0 encodes what type of message to generate:
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
diff changeset
108
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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109 13c: e92d4000 stmdb sp!, {lr}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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110 140: e1a0c000 mov r12, r0
14
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
diff changeset
111 144: e59f0cc0 ldr r0, =0x80010C ; via 0xe0c
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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112 148: e3a0103e mov r1, #62 ; 0x3e
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
113 14c: e5c01000 strb r1, [r0]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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114 150: e35c0009 cmp r12, #9 ; 0x9
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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115 154: 88bd8000 ldmhiia sp!, {pc}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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116 158: e28f1000 add r1, pc, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
117 15c: e791f10c ldr pc, [r1, r12, lsl #2]
14
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
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118 ; switch table, absolute addresses
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
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119 160: 000002ac
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
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120 164: 00000280
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
diff changeset
121 168: 00000264
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
diff changeset
122 16c: 00000248
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
diff changeset
123 170: 00000224
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
diff changeset
124 174: 00000200
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
diff changeset
125 178: 000001dc
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
diff changeset
126 17c: 000001c0
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
diff changeset
127 180: 000001a4
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
diff changeset
128 184: 00000188
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
diff changeset
129 ; case 9:
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
diff changeset
130 188: e3a0c042 mov r12, #66 ; 0x42 'B'
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
131 18c: e5c0c001 strb r12, [r0, #1]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
132 190: e3a01002 mov r1, #2 ; 0x2
14
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
diff changeset
133 194: e59fcc74 ldr r12, =0x800520 ; via 0xe10
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
134 198: e5dc2000 ldrb r2, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
135 19c: eb000458 bl 0x1304
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
136 1a0: e8bd8000 ldmia sp!, {pc}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
137
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
138 1a4: e3a0c062 mov r12, #98 ; 0x62
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
139 1a8: e5c0c001 strb r12, [r0, #1]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
140 1ac: e3a01002 mov r1, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
141 1b0: e59fcc58 ldr r12, [pc, #3160] ; 0xe10
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
142 1b4: e5dc2000 ldrb r2, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
143 1b8: eb000451 bl 0x1304
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
144 1bc: e8bd8000 ldmia sp!, {pc}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
145
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
146 1c0: e3a0c061 mov r12, #97 ; 0x61
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
147 1c4: e5c0c001 strb r12, [r0, #1]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
148 1c8: e3a01002 mov r1, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
149 1cc: e59fcc3c ldr r12, [pc, #3132] ; 0xe10
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
150 1d0: e5dc2000 ldrb r2, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
151 1d4: eb00044a bl 0x1304
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
152 1d8: e8bd8000 ldmia sp!, {pc}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
153
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
154 1dc: e3a0c043 mov r12, #67 ; 0x43
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
155 1e0: e5c0c001 strb r12, [r0, #1]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
156 1e4: e59fcc18 ldr r12, [pc, #3096] ; 0xe04
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
157 1e8: e5dc1010 ldrb r1, [r12, #16]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
158 1ec: e5c01002 strb r1, [r0, #2]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
159 1f0: e5dc2008 ldrb r2, [r12, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
160 1f4: e3a01003 mov r1, #3 ; 0x3
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
161 1f8: eb000441 bl 0x1304
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
162 1fc: e8bd8000 ldmia sp!, {pc}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
163
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
164 200: e3a0c063 mov r12, #99 ; 0x63
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
165 204: e5c0c001 strb r12, [r0, #1]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
166 208: e59fcbf4 ldr r12, [pc, #3060] ; 0xe04
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
167 20c: e5dc1010 ldrb r1, [r12, #16]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
168 210: e5c01002 strb r1, [r0, #2]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
169 214: e5dc2008 ldrb r2, [r12, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
170 218: e3a01003 mov r1, #3 ; 0x3
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
171 21c: eb000438 bl 0x1304
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
172 220: e8bd8000 ldmia sp!, {pc}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
173
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
174 224: e3a0c057 mov r12, #87 ; 0x57
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
175 228: e5c0c001 strb r12, [r0, #1]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
176 22c: e59fcbd0 ldr r12, [pc, #3024] ; 0xe04
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
177 230: e5dc1019 ldrb r1, [r12, #25]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
178 234: e5c01002 strb r1, [r0, #2]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
179 238: e5dc2008 ldrb r2, [r12, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
180 23c: e3a01003 mov r1, #3 ; 0x3
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
181 240: eb00042f bl 0x1304
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
182 244: e8bd8000 ldmia sp!, {pc}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
183
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
184 248: e3a0c077 mov r12, #119 ; 0x77
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
185 24c: e5c0c001 strb r12, [r0, #1]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
186 250: e3a01002 mov r1, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
187 254: e59fcbb4 ldr r12, [pc, #2996] ; 0xe10
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
188 258: e5dc2000 ldrb r2, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
189 25c: eb000428 bl 0x1304
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
190 260: e8bd8000 ldmia sp!, {pc}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
191
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
192 264: e3a0c050 mov r12, #80 ; 0x50
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
193 268: e5c0c001 strb r12, [r0, #1]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
194 26c: e3a01002 mov r1, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
195 270: e59fcb98 ldr r12, [pc, #2968] ; 0xe10
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
196 274: e5dc2000 ldrb r2, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
197 278: eb000421 bl 0x1304
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
198 27c: e8bd8000 ldmia sp!, {pc}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
199
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
200 280: e3a0c070 mov r12, #112 ; 0x70
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
201 284: e5c0c001 strb r12, [r0, #1]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
202 288: e3a0c000 mov r12, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
203 28c: e5c0c002 strb r12, [r0, #2]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
204 290: e3a0c004 mov r12, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
205 294: e5c0c003 strb r12, [r0, #3]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
206 298: e3a01004 mov r1, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
207 29c: e59fcb6c ldr r12, [pc, #2924] ; 0xe10
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
208 2a0: e5dc2000 ldrb r2, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
209 2a4: eb000416 bl 0x1304
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
210 2a8: e8bd8000 ldmia sp!, {pc}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
211
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
212 2ac: e3a0c069 mov r12, #105 ; 0x69
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
213 2b0: e5c0c001 strb r12, [r0, #1]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
214 2b4: e3a01002 mov r1, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
215 2b8: e59fcb50 ldr r12, [pc, #2896] ; 0xe10
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
216 2bc: e5dc2000 ldrb r2, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
217 2c0: eb00040f bl 0x1304
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
218 2c4: e8bd8000 ldmia sp!, {pc}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
219
12
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
220 ; Routine at 0x2c8 - called from 0x1090. It receives and interprets
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
221 ; the 2nd byte that comes after the '<'. It appears that this function
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
222 ; only decodes the several known commands, but doesn't actually execute
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
223 ; them. If a byte was received during the allowed time (set by the 800104
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
224 ; variable), this function returns 1 and sets the *R0 byte to the decoding
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
225 ; result. If no byte was received, this function returns 0; ditto if a
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
226 ; timeout occurred while waiting for additional bytes.
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
227 ;
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
228 ; Arguments:
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
229 ; R0 points to a byte of RAM, an additional output
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
230 ;
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
231 ; *R0 return byte values:
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
232 ; 00 = got nothing (timeout) or an invalid/non-understood command
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
233 ; 01 = got 'i'
13
e0ce45f043c0 boot ROM re: continuing plowing through the serial protocol code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 12
diff changeset
234 ; 02 = got 'p', 9 additional bytes received, a bunch of vars filled
e0ce45f043c0 boot ROM re: continuing plowing through the serial protocol code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 12
diff changeset
235 ; 03 = got 'w', the rest of the command read into the buffer at
14
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
diff changeset
236 ; 80010C, the flag at 800530 set
12
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
237 ; 04 = got 'c', 1 additional byte received, extended to a half-word
14
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
diff changeset
238 ; and written to 800526
12
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
239 ; 05 = got 'a'
14
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
diff changeset
240 ; 06 = got 'b', 4 bytes written to 80052C
12
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
241
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
242 2c8: e92d4ff0 stmdb sp!, {r4, r5, r6, r7, r8, r9, r10, r11, lr}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
243 2cc: e24dd004 sub sp, sp, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
244 2d0: e1a0b000 mov r11, r0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
245 2d4: e3a05000 mov r5, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
246 2d8: e5cb5000 strb r5, [r11]
12
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
247 2dc: e59f7b30 ldr r7, =0x800104 ; via 0xe14
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
248 2e0: e59f4b1c ldr r4, =0x800518 ; via 0xe04
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
249 2e4: e5d40008 ldrb r0, [r4, #8] ; read 800520
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
250 2e8: e5971000 ldr r1, [r7] ; read 800104
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
251 2ec: e28d2002 add r2, sp, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
252 2f0: eb00044c bl 0x1428
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
253 2f4: e3500000 cmp r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
254 2f8: 0a0000fc beq 0x6f0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
255 2fc: e5ddc002 ldrb r12, [sp, #2]
12
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
256 300: e25cc061 subs r12, r12, #97 ; 0x61 'a'
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
257 304: 0a000104 beq 0x71c
12
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
258 308: e25cc001 subs r12, r12, #1 ; 0x1 'b'
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
259 30c: 0a0000ee beq 0x6cc
12
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
260 310: e25cc001 subs r12, r12, #1 ; 0x1 'c'
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
261 314: 0a0000e1 beq 0x6a0
12
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
262 318: e25cc006 subs r12, r12, #6 ; 0x6 'i'
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
263 31c: 0a0000dc beq 0x694
12
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
264 320: e25cc007 subs r12, r12, #7 ; 0x7 'p'
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
265 324: 0a0000b8 beq 0x60c
12
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
266 328: e25cc007 subs r12, r12, #7 ; 0x7 'w'
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
267 32c: 1a0000fc bne 0x724
12
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
268 ; got 'w'
14
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
diff changeset
269 ; R4=0x800518, byte at 800530 used for something, init to 0
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
270 330: e5c45018 strb r5, [r4, #24]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
271 334: e3a0a000 mov r10, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
272 338: e3a06000 mov r6, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
273 33c: ea000015 b 0x398
13
e0ce45f043c0 boot ROM re: continuing plowing through the serial protocol code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 12
diff changeset
274 ; more blocks
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
275 340: e5d40008 ldrb r0, [r4, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
276 344: e5971000 ldr r1, [r7]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
277 348: e28d2002 add r2, sp, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
278 34c: eb000435 bl 0x1428
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
279 350: e3500000 cmp r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
280 354: 0a0000e5 beq 0x6f0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
281 358: e5ddc002 ldrb r12, [sp, #2]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
282 35c: e35c003c cmp r12, #60 ; 0x3c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
283 360: 0a000001 beq 0x36c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
284 364: e3a0c001 mov r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
285 368: e5c4c018 strb r12, [r4, #24]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
286 36c: e5d40008 ldrb r0, [r4, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
287 370: e5971000 ldr r1, [r7]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
288 374: e28d2002 add r2, sp, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
289 378: eb00042a bl 0x1428
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
290 37c: e3500000 cmp r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
291 380: 0a0000da beq 0x6f0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
292 384: e5ddc002 ldrb r12, [sp, #2]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
293 388: e35c0077 cmp r12, #119 ; 0x77
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
294 38c: 0a000001 beq 0x398
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
295 390: e3a0c001 mov r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
296 394: e5c4c018 strb r12, [r4, #24]
13
e0ce45f043c0 boot ROM re: continuing plowing through the serial protocol code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 12
diff changeset
297 ; the entry to the 'w' handling block branches here
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
298 398: e5d40008 ldrb r0, [r4, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
299 39c: e5971000 ldr r1, [r7]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
300 3a0: e1a0200d mov r2, sp
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
301 3a4: eb00041f bl 0x1428
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
302 3a8: e3500000 cmp r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
303 3ac: 0a0000cf beq 0x6f0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
304 3b0: e5d40008 ldrb r0, [r4, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
305 3b4: e5971000 ldr r1, [r7]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
306 3b8: e28d2001 add r2, sp, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
307 3bc: eb000419 bl 0x1428
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
308 3c0: e3500000 cmp r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
309 3c4: 0a0000c9 beq 0x6f0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
310 3c8: e5dd0000 ldrb r0, [sp]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
311 3cc: e5ddc001 ldrb r12, [sp, #1]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
312 3d0: e150000c cmp r0, r12
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
313 3d4: 1a000000 bne 0x3dc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
314 3d8: e3a0a001 mov r10, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
315 3dc: e5dd0000 ldrb r0, [sp]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
316 3e0: e5ddc001 ldrb r12, [sp, #1]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
317 3e4: e150000c cmp r0, r12
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
318 3e8: ca00007c bgt 0x5e0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
319 3ec: e5ddc001 ldrb r12, [sp, #1]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
320 3f0: e35c0000 cmp r12, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
321 3f4: 0a000079 beq 0x5e0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
322 3f8: e5ddc000 ldrb r12, [sp]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
323 3fc: e35c0000 cmp r12, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
324 400: 0a000076 beq 0x5e0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
325 404: e3a08002 mov r8, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
326 408: e3a05000 mov r5, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
327 40c: e5d40008 ldrb r0, [r4, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
328 410: e5971000 ldr r1, [r7]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
329 414: e28d2002 add r2, sp, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
330 418: eb000402 bl 0x1428
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
331 41c: e3500000 cmp r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
332 420: 0a0000b2 beq 0x6f0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
333 424: e5ddc002 ldrb r12, [sp, #2]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
334 428: e18cc405 orr r12, r12, r5, lsl #8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
335 42c: e1a0c80c mov r12, r12, lsl #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
336 430: e1a0582c mov r5, r12, lsr #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
337 434: e2588001 subs r8, r8, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
338 438: 1afffff3 bne 0x40c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
339 43c: e3a09004 mov r9, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
340 440: e3a08000 mov r8, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
341 444: e5d40008 ldrb r0, [r4, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
342 448: e5971000 ldr r1, [r7]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
343 44c: e28d2002 add r2, sp, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
344 450: eb0003f4 bl 0x1428
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
345 454: e3500000 cmp r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
346 458: 0a0000a4 beq 0x6f0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
347 45c: e5ddc002 ldrb r12, [sp, #2]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
348 460: e18c8408 orr r8, r12, r8, lsl #8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
349 464: e2599001 subs r9, r9, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
350 468: 1afffff5 bne 0x444
13
e0ce45f043c0 boot ROM re: continuing plowing through the serial protocol code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 12
diff changeset
351 46c: e59fc9a4 ldr r12, =0x800750 ; via 0xe18
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
352 470: e158000c cmp r8, r12
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
353 474: 3a00004e bcc 0x5b4
13
e0ce45f043c0 boot ROM re: continuing plowing through the serial protocol code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 12
diff changeset
354 478: e59f099c ldr r0, =0x7F8AF ; via 0xe1c
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
355 47c: e080c00c add r12, r0, r12
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
356 480: e158000c cmp r8, r12
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
357 484: 8a00004a bhi 0x5b4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
358 488: e085c006 add r12, r5, r6
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
359 48c: e35c0ffe cmp r12, #1016 ; 0x3f8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
360 490: aa000037 bge 0x574
13
e0ce45f043c0 boot ROM re: continuing plowing through the serial protocol code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 12
diff changeset
361 494: e59fc970 ldr r12, =0x80010C ; via 0xe0c
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
362 498: e5dd0000 ldrb r0, [sp]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
363 49c: e7c6000c strb r0, [r6, r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
364 4a0: e2860001 add r0, r6, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
365 4a4: e1a00800 mov r0, r0, lsl #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
366 4a8: e1a06820 mov r6, r0, lsr #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
367 4ac: e5dd0001 ldrb r0, [sp, #1]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
368 4b0: e7c6000c strb r0, [r6, r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
369 4b4: e2860001 add r0, r6, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
370 4b8: e1a00800 mov r0, r0, lsl #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
371 4bc: e1a06820 mov r6, r0, lsr #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
372 4c0: e1a00425 mov r0, r5, lsr #8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
373 4c4: e7c6000c strb r0, [r6, r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
374 4c8: e2860001 add r0, r6, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
375 4cc: e1a00800 mov r0, r0, lsl #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
376 4d0: e1a06820 mov r6, r0, lsr #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
377 4d4: e7c6500c strb r5, [r6, r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
378 4d8: e2860001 add r0, r6, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
379 4dc: e1a00800 mov r0, r0, lsl #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
380 4e0: e1a06820 mov r6, r0, lsr #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
381 4e4: e1a00c28 mov r0, r8, lsr #24
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
382 4e8: e7c6000c strb r0, [r6, r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
383 4ec: e2860001 add r0, r6, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
384 4f0: e1a00800 mov r0, r0, lsl #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
385 4f4: e1a06820 mov r6, r0, lsr #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
386 4f8: e1a00828 mov r0, r8, lsr #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
387 4fc: e7c6000c strb r0, [r6, r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
388 500: e2860001 add r0, r6, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
389 504: e1a00800 mov r0, r0, lsl #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
390 508: e1a06820 mov r6, r0, lsr #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
391 50c: e1a00428 mov r0, r8, lsr #8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
392 510: e7c6000c strb r0, [r6, r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
393 514: e2860001 add r0, r6, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
394 518: e1a00800 mov r0, r0, lsl #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
395 51c: e1a06820 mov r6, r0, lsr #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
396 520: e086900c add r9, r6, r12
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
397 524: e5c98000 strb r8, [r9]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
398 528: e286c001 add r12, r6, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
399 52c: e1a0c80c mov r12, r12, lsl #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
400 530: e1a0682c mov r6, r12, lsr #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
401 534: e3550000 cmp r5, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
402 538: 0a000018 beq 0x5a0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
403 53c: e085c006 add r12, r5, r6
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
404 540: e1a0c80c mov r12, r12, lsl #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
405 544: e1a0682c mov r6, r12, lsr #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
406 548: e2899001 add r9, r9, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
407 54c: e5d40008 ldrb r0, [r4, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
408 550: e5971000 ldr r1, [r7]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
409 554: e1a02009 mov r2, r9
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
410 558: eb0003b2 bl 0x1428
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
411 55c: e3500000 cmp r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
412 560: 0a000062 beq 0x6f0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
413 564: e2899001 add r9, r9, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
414 568: e2555001 subs r5, r5, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
415 56c: 1afffff6 bne 0x54c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
416 570: ea00000a b 0x5a0
13
e0ce45f043c0 boot ROM re: continuing plowing through the serial protocol code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 12
diff changeset
417 ; length exceeded: read and discard
e0ce45f043c0 boot ROM re: continuing plowing through the serial protocol code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 12
diff changeset
418 ; the increment of R5 looks like a bug!
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
419 574: e285c001 add r12, r5, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
420 578: e1a0c80c mov r12, r12, lsl #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
421 57c: e1a0582c mov r5, r12, lsr #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
422 580: e5d40008 ldrb r0, [r4, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
423 584: e5971000 ldr r1, [r7]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
424 588: e28d2002 add r2, sp, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
425 58c: eb0003a5 bl 0x1428
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
426 590: e3500000 cmp r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
427 594: 0a000055 beq 0x6f0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
428 598: e2555001 subs r5, r5, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
429 59c: 1afffff7 bne 0x580
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
430 5a0: e35a0000 cmp r10, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
431 5a4: 0affff65 beq 0x340
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
432 5a8: e3a0c003 mov r12, #3 ; 0x3
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
433 5ac: e5cbc000 strb r12, [r11]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
434 5b0: ea00005b b 0x724
13
e0ce45f043c0 boot ROM re: continuing plowing through the serial protocol code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 12
diff changeset
435 ; error path (<w load address outside of the permissible IRAM range)
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
436 5b4: e3a0c001 mov r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
437 5b8: e5c4c018 strb r12, [r4, #24]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
438 5bc: e3a0c003 mov r12, #3 ; 0x3
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
439 5c0: e5cbc000 strb r12, [r11]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
440 5c4: e5d40008 ldrb r0, [r4, #8]
13
e0ce45f043c0 boot ROM re: continuing plowing through the serial protocol code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 12
diff changeset
441 5c8: e59f1850 ldr r1, =0xFFFFF ; via 0xe20
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
442 5cc: e28d2002 add r2, sp, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
443 5d0: eb000394 bl 0x1428
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
444 5d4: e3500001 cmp r0, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
445 5d8: 0afffff9 beq 0x5c4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
446 5dc: ea000050 b 0x724
13
e0ce45f043c0 boot ROM re: continuing plowing through the serial protocol code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 12
diff changeset
447 ; another error path (bad block number voodoo)
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
448 5e0: e3a0c001 mov r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
449 5e4: e5c4c018 strb r12, [r4, #24]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
450 5e8: e3a0c003 mov r12, #3 ; 0x3
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
451 5ec: e5cbc000 strb r12, [r11]
13
e0ce45f043c0 boot ROM re: continuing plowing through the serial protocol code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 12
diff changeset
452 ; flush serial input (wait for long silence), then return
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
453 5f0: e5d40008 ldrb r0, [r4, #8]
13
e0ce45f043c0 boot ROM re: continuing plowing through the serial protocol code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 12
diff changeset
454 5f4: e59f1824 ldr r1, =0xFFFFF ; via 0xe20
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
455 5f8: e28d2002 add r2, sp, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
456 5fc: eb000389 bl 0x1428
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
457 600: e3500001 cmp r0, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
458 604: 0afffff9 beq 0x5f0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
459 608: ea000045 b 0x724
12
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
460 ; got 'p'
13
e0ce45f043c0 boot ROM re: continuing plowing through the serial protocol code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 12
diff changeset
461 ; R4=0x800518
e0ce45f043c0 boot ROM re: continuing plowing through the serial protocol code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 12
diff changeset
462 60c: e59f67f8 ldr r6, =0x80010C ; via 0xe0c
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
463 610: e3a08009 mov r8, #9 ; 0x9
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
464 614: e5d40008 ldrb r0, [r4, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
465 618: e5971000 ldr r1, [r7]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
466 61c: e1a02006 mov r2, r6
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
467 620: eb000380 bl 0x1428
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
468 624: e3500000 cmp r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
469 628: 0a000030 beq 0x6f0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
470 62c: e2866001 add r6, r6, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
471 630: e2588001 subs r8, r8, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
472 634: 1afffff6 bne 0x614
13
e0ce45f043c0 boot ROM re: continuing plowing through the serial protocol code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 12
diff changeset
473 638: e59fc7cc ldr r12, =0x80010C ; via 0xe0c
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
474 63c: e5dc0000 ldrb r0, [r12]
13
e0ce45f043c0 boot ROM re: continuing plowing through the serial protocol code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 12
diff changeset
475 640: e5c40000 strb r0, [r4] ; into 800518
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
476 644: e5dc0001 ldrb r0, [r12, #1]
13
e0ce45f043c0 boot ROM re: continuing plowing through the serial protocol code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 12
diff changeset
477 648: e5c40009 strb r0, [r4, #9] ; into 800521
e0ce45f043c0 boot ROM re: continuing plowing through the serial protocol code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 12
diff changeset
478 64c: e1c450ba strh r5, [r4, #10] ; 16-bit 0 into 800522
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
479 650: e5dc1003 ldrb r1, [r12, #3]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
480 654: e5dc0002 ldrb r0, [r12, #2]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
481 658: e1810400 orr r0, r1, r0, lsl #8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
482 65c: e1c400ba strh r0, [r4, #10]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
483 660: e5dc0004 ldrb r0, [r12, #4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
484 664: e5c4000d strb r0, [r4, #13]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
485 668: e5dc0006 ldrb r0, [r12, #6]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
486 66c: e5dc1005 ldrb r1, [r12, #5]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
487 670: e1801401 orr r1, r0, r1, lsl #8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
488 674: e5dc0007 ldrb r0, [r12, #7]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
489 678: e1800401 orr r0, r0, r1, lsl #8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
490 67c: e5dcc008 ldrb r12, [r12, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
491 680: e18cc400 orr r12, r12, r0, lsl #8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
492 684: e584c004 str r12, [r4, #4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
493 688: e3a0c002 mov r12, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
494 68c: e5cbc000 strb r12, [r11]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
495 690: ea000023 b 0x724
12
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
496 ; got 'i'
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
497 694: e3a0c001 mov r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
498 698: e5cbc000 strb r12, [r11]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
499 69c: ea000020 b 0x724
12
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
500 ; got 'c'
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
501 6a0: e5d40008 ldrb r0, [r4, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
502 6a4: e5971000 ldr r1, [r7]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
503 6a8: e28d2002 add r2, sp, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
504 6ac: eb00035d bl 0x1428
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
505 6b0: e3500000 cmp r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
506 6b4: 0a00000d beq 0x6f0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
507 6b8: e5ddc002 ldrb r12, [sp, #2]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
508 6bc: e1c4c0be strh r12, [r4, #14]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
509 6c0: e3a0c004 mov r12, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
510 6c4: e5cbc000 strb r12, [r11]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
511 6c8: ea000015 b 0x724
12
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
512 ; got 'b'
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
513 ; R4=0x800518
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
514 6cc: e3a0c000 mov r12, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
515 6d0: e584c014 str r12, [r4, #20]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
516 6d4: e3a05004 mov r5, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
517 6d8: e5d40008 ldrb r0, [r4, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
518 6dc: e5971000 ldr r1, [r7]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
519 6e0: e28d2002 add r2, sp, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
520 6e4: eb00034f bl 0x1428
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
521 6e8: e3500000 cmp r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
522 6ec: 1a000001 bne 0x6f8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
523 6f0: e3a00000 mov r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
524 6f4: ea00000b b 0x728
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
525 6f8: e5dd0002 ldrb r0, [sp, #2]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
526 6fc: e594c014 ldr r12, [r4, #20]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
527 700: e180c40c orr r12, r0, r12, lsl #8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
528 704: e584c014 str r12, [r4, #20]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
529 708: e2555001 subs r5, r5, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
530 70c: 1afffff1 bne 0x6d8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
531 710: e3a0c006 mov r12, #6 ; 0x6
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
532 714: e5cbc000 strb r12, [r11]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
533 718: ea000001 b 0x724
12
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
534 ; got 'a'
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
535 71c: e3a0c005 mov r12, #5 ; 0x5
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
536 720: e5cbc000 strb r12, [r11]
12
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
537 ; common return for 'got something', including invalid (non-understood) commands
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
538 724: e3a00001 mov r0, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
539 728: e28dd004 add sp, sp, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
540 72c: e8bd8ff0 ldmia sp!, {r4, r5, r6, r7, r8, r9, r10, r11, pc}
12
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
541
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
542 730: e92d43f0 stmdb sp!, {r4, r5, r6, r7, r8, r9, lr}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
543 734: e59f46c8 ldr r4, [pc, #1736] ; 0xe04
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
544 738: e5d4c018 ldrb r12, [r4, #24]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
545 73c: e35c0001 cmp r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
546 740: 0a00004a beq 0x870
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
547 744: e59f56c0 ldr r5, [pc, #1728] ; 0xe0c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
548 748: e59f66c8 ldr r6, [pc, #1736] ; 0xe18
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
549 74c: e3a07000 mov r7, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
550 750: e3a00000 mov r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
551 754: e080c005 add r12, r0, r5
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
552 758: e28cc001 add r12, r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
553 75c: e7d02005 ldrb r2, [r0, r5]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
554 760: e5dc1000 ldrb r1, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
555 764: e1520001 cmp r2, r1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
556 768: 1a000000 bne 0x770
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
557 76c: e3a07001 mov r7, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
558 770: e5dc2002 ldrb r2, [r12, #2]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
559 774: e5dc1001 ldrb r1, [r12, #1]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
560 778: e0821401 add r1, r2, r1, lsl #8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
561 77c: e1a01801 mov r1, r1, lsl #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
562 780: e1a01821 mov r1, r1, lsr #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
563 784: e5dc3004 ldrb r3, [r12, #4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
564 788: e5dc2003 ldrb r2, [r12, #3]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
565 78c: e0832402 add r2, r3, r2, lsl #8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
566 790: e5dc3005 ldrb r3, [r12, #5]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
567 794: e0832402 add r2, r3, r2, lsl #8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
568 798: e5dcc006 ldrb r12, [r12, #6]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
569 79c: e08c2402 add r2, r12, r2, lsl #8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
570 7a0: e202c0ff and r12, r2, #255 ; 0xff
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
571 7a4: e081300c add r3, r1, r12
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
572 7a8: e1a0c422 mov r12, r2, lsr #8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
573 7ac: e20cc0ff and r12, r12, #255 ; 0xff
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
574 7b0: e08c3003 add r3, r12, r3
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
575 7b4: e1a0c822 mov r12, r2, lsr #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
576 7b8: e20cc0ff and r12, r12, #255 ; 0xff
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
577 7bc: e08cc003 add r12, r12, r3
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
578 7c0: e08ccc22 add r12, r12, r2, lsr #24
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
579 7c4: e28cc005 add r12, r12, #5 ; 0x5
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
580 7c8: e1a0c80c mov r12, r12, lsl #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
581 7cc: e1a0882c mov r8, r12, lsr #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
582 7d0: e3a03000 mov r3, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
583 7d4: e1520006 cmp r2, r6
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
584 7d8: 3a000003 bcc 0x7ec
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
585 7dc: e59fc638 ldr r12, [pc, #1592] ; 0xe1c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
586 7e0: e08cc006 add r12, r12, r6
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
587 7e4: e152000c cmp r2, r12
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
588 7e8: 9a000001 bls 0x7f4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
589 7ec: e383c001 orr r12, r3, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
590 7f0: e20c30ff and r3, r12, #255 ; 0xff
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
591 7f4: e3530000 cmp r3, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
592 7f8: 1a00001d bne 0x874
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
593 7fc: e3a09000 mov r9, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
594 800: e3510000 cmp r1, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
595 804: 0a00000b beq 0x838
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
596 808: e089c000 add r12, r9, r0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
597 80c: e085c00c add r12, r5, r12
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
598 810: e5dcc008 ldrb r12, [r12, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
599 814: e4c2c001 strb r12, [r2], #1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
600 818: e08cc008 add r12, r12, r8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
601 81c: e1a0c80c mov r12, r12, lsl #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
602 820: e1a0882c mov r8, r12, lsr #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
603 824: e289c001 add r12, r9, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
604 828: e1a0c80c mov r12, r12, lsl #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
605 82c: e1a0982c mov r9, r12, lsr #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
606 830: e2511001 subs r1, r1, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
607 834: 1afffff3 bne 0x808
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
608 838: e3a0c0ff mov r12, #255 ; 0xff
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
609 83c: e1ccc008 bic r12, r12, r8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
610 840: e1a0c80c mov r12, r12, lsl #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
611 844: e1a0882c mov r8, r12, lsr #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
612 848: e1d4c1b0 ldrh r12, [r4, #16]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
613 84c: e088c00c add r12, r8, r12
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
614 850: e1c4c1b0 strh r12, [r4, #16]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
615 854: e080c009 add r12, r0, r9
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
616 858: e28cc008 add r12, r12, #8 ; 0x8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
617 85c: e1a0c80c mov r12, r12, lsl #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
618 860: e1a0082c mov r0, r12, lsr #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
619 864: e3570000 cmp r7, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
620 868: 0affffb9 beq 0x754
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
621 86c: ea000000 b 0x874
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
622 870: e3a03002 mov r3, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
623 874: e5c43019 strb r3, [r4, #25]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
624 878: e3530000 cmp r3, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
625 87c: 0a000008 beq 0x8a4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
626 880: e3a00004 mov r0, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
627 884: ebfffe2c bl 0x13c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
628 888: e5d41008 ldrb r1, [r4, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
629 88c: e3a00004 mov r0, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
630 890: eb0002d0 bl 0x13d8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
631 894: e1a00004 mov r0, r4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
632 898: ebfffe1f bl 0x11c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
633 89c: e3a00001 mov r0, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
634 8a0: e8bd83f0 ldmia sp!, {r4, r5, r6, r7, r8, r9, pc}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
635
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
636 8a4: e3a00003 mov r0, #3 ; 0x3
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
637 8a8: ebfffe23 bl 0x13c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
638 8ac: e3a00000 mov r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
639 8b0: e8bd83f0 ldmia sp!, {r4, r5, r6, r7, r8, r9, pc}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
640
13
e0ce45f043c0 boot ROM re: continuing plowing through the serial protocol code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 12
diff changeset
641 ; The routine at 0x8b4 handles the command received by the 0x2c8 routine.
e0ce45f043c0 boot ROM re: continuing plowing through the serial protocol code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 12
diff changeset
642 ; The argument in R0 is the code produced by the latter.
e0ce45f043c0 boot ROM re: continuing plowing through the serial protocol code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 12
diff changeset
643
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
644 8b4: e92d4070 stmdb sp!, {r4, r5, r6, lr}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
645 8b8: e24dd008 sub sp, sp, #8 ; 0x8
14
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
diff changeset
646 8bc: e59f4560 ldr r4, =0x800108 ; via 0xe24
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
647 8c0: e5d4c000 ldrb r12, [r4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
648 8c4: e25cc001 subs r12, r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
649 8c8: 0a000102 beq 0xcd8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
650 8cc: e25cc001 subs r12, r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
651 8d0: 0a00008a beq 0xb00
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
652 8d4: e25cc001 subs r12, r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
653 8d8: 0a000047 beq 0x9fc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
654 8dc: e25cc001 subs r12, r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
655 8e0: 1a000145 bne 0xdfc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
656 8e4: e250c001 subs r12, r0, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
657 8e8: 0a00003c beq 0x9e0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
658 8ec: e25cc002 subs r12, r12, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
659 8f0: 0a00002f beq 0x9b4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
660 8f4: e25cc001 subs r12, r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
661 8f8: 0a000022 beq 0x988
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
662 8fc: e25cc001 subs r12, r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
663 900: 0a000017 beq 0x964
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
664 904: e25cc001 subs r12, r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
665 908: 1a00013b bne 0xdfc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
666 90c: e59f54f0 ldr r5, [pc, #1264] ; 0xe04
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
667 910: e59f0500 ldr r0, [pc, #1280] ; 0xe18
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
668 914: e595c014 ldr r12, [r5, #20]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
669 918: e15c0000 cmp r12, r0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
670 91c: 3a000006 bcc 0x93c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
671 920: e59f14f4 ldr r1, [pc, #1268] ; 0xe1c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
672 924: e0810000 add r0, r1, r0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
673 928: e15c0000 cmp r12, r0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
674 92c: 8a000002 bhi 0x93c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
675 930: e3a00008 mov r0, #8 ; 0x8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
676 934: ebfffe00 bl 0x13c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
677 938: ebfffdeb bl 0xec
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
678 93c: e3a00009 mov r0, #9 ; 0x9
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
679 940: ebfffdfd bl 0x13c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
680 944: e5d51008 ldrb r1, [r5, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
681 948: e3a00004 mov r0, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
682 94c: eb0002a1 bl 0x13d8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
683 950: e1a00005 mov r0, r5
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
684 954: ebfffdf0 bl 0x11c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
685 958: e3a0c001 mov r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
686 95c: e5c4c000 strb r12, [r4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
687 960: ea000125 b 0xdfc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
688 964: e59f5498 ldr r5, [pc, #1176] ; 0xe04
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
689 968: e1a00005 mov r0, r5
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
690 96c: ebfffdea bl 0x11c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
691 970: e5d51008 ldrb r1, [r5, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
692 974: e3a00004 mov r0, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
693 978: eb000296 bl 0x13d8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
694 97c: e3a0c001 mov r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
695 980: e5c4c000 strb r12, [r4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
696 984: ea00011c b 0xdfc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
697 988: e3a00006 mov r0, #6 ; 0x6
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
698 98c: ebfffdea bl 0x13c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
699 990: e59f546c ldr r5, [pc, #1132] ; 0xe04
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
700 994: e5d51008 ldrb r1, [r5, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
701 998: e3a00004 mov r0, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
702 99c: eb00028d bl 0x13d8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
703 9a0: e1a00005 mov r0, r5
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
704 9a4: ebfffddc bl 0x11c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
705 9a8: e3a0c001 mov r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
706 9ac: e5c4c000 strb r12, [r4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
707 9b0: ea000111 b 0xdfc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
708 9b4: e3a00004 mov r0, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
709 9b8: ebfffddf bl 0x13c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
710 9bc: e59f5440 ldr r5, [pc, #1088] ; 0xe04
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
711 9c0: e5d51008 ldrb r1, [r5, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
712 9c4: e3a00004 mov r0, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
713 9c8: eb000282 bl 0x13d8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
714 9cc: e1a00005 mov r0, r5
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
715 9d0: ebfffdd1 bl 0x11c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
716 9d4: e3a0c001 mov r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
717 9d8: e5c4c000 strb r12, [r4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
718 9dc: ea000106 b 0xdfc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
719 9e0: e59f041c ldr r0, [pc, #1052] ; 0xe04
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
720 9e4: ebfffdcc bl 0x11c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
721 9e8: e3a00000 mov r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
722 9ec: ebfffdd2 bl 0x13c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
723 9f0: e3a0c004 mov r12, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
724 9f4: e5c4c000 strb r12, [r4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
725 9f8: ea0000ff b 0xdfc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
726 9fc: e250c001 subs r12, r0, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
727 a00: 0a000037 beq 0xae4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
728 a04: e25cc002 subs r12, r12, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
729 a08: 0a000031 beq 0xad4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
730 a0c: e25cc001 subs r12, r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
731 a10: 0a000017 beq 0xa74
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
732 a14: e25cc001 subs r12, r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
733 a18: 0a00000c beq 0xa50
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
734 a1c: e25cc001 subs r12, r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
735 a20: 1a0000f5 bne 0xdfc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
736 a24: e3a00009 mov r0, #9 ; 0x9
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
737 a28: ebfffdc3 bl 0x13c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
738 a2c: e59f53d0 ldr r5, [pc, #976] ; 0xe04
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
739 a30: e5d51008 ldrb r1, [r5, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
740 a34: e3a00004 mov r0, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
741 a38: eb000266 bl 0x13d8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
742 a3c: e1a00005 mov r0, r5
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
743 a40: ebfffdb5 bl 0x11c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
744 a44: e3a0c001 mov r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
745 a48: e5c4c000 strb r12, [r4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
746 a4c: ea0000ea b 0xdfc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
747 a50: e59f53ac ldr r5, [pc, #940] ; 0xe04
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
748 a54: e1a00005 mov r0, r5
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
749 a58: ebfffdaf bl 0x11c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
750 a5c: e5d51008 ldrb r1, [r5, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
751 a60: e3a00004 mov r0, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
752 a64: eb00025b bl 0x13d8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
753 a68: e3a0c001 mov r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
754 a6c: e5c4c000 strb r12, [r4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
755 a70: ea0000e1 b 0xdfc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
756 a74: e59fc388 ldr r12, [pc, #904] ; 0xe04
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
757 a78: e3a010ff mov r1, #255 ; 0xff
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
758 a7c: e1dc01b0 ldrh r0, [r12, #16]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
759 a80: e1c10000 bic r0, r1, r0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
760 a84: e1dcc0be ldrh r12, [r12, #14]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
761 a88: e20cc0ff and r12, r12, #255 ; 0xff
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
762 a8c: e150000c cmp r0, r12
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
763 a90: 1a000004 bne 0xaa8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
764 a94: e3a00005 mov r0, #5 ; 0x5
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
765 a98: ebfffda7 bl 0x13c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
766 a9c: e3a0c004 mov r12, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
767 aa0: e5c4c000 strb r12, [r4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
768 aa4: ea0000d4 b 0xdfc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
769 aa8: e3a00006 mov r0, #6 ; 0x6
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
770 aac: ebfffda2 bl 0x13c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
771 ab0: e59f534c ldr r5, [pc, #844] ; 0xe04
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
772 ab4: e1a00005 mov r0, r5
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
773 ab8: ebfffd97 bl 0x11c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
774 abc: e5d51008 ldrb r1, [r5, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
775 ac0: e3a00004 mov r0, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
776 ac4: eb000243 bl 0x13d8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
777 ac8: e3a0c001 mov r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
778 acc: e5c4c000 strb r12, [r4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
779 ad0: ea0000c9 b 0xdfc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
780 ad4: ebffff15 bl 0x730
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
781 ad8: e3500000 cmp r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
782 adc: 0a000038 beq 0xbc4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
783 ae0: ea00003a b 0xbd0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
784 ae4: e59f0318 ldr r0, [pc, #792] ; 0xe04
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
785 ae8: ebfffd8b bl 0x11c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
786 aec: e3a00000 mov r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
787 af0: ebfffd91 bl 0x13c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
788 af4: e3a0c003 mov r12, #3 ; 0x3
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
789 af8: e5c4c000 strb r12, [r4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
790 afc: ea0000be b 0xdfc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
791 b00: e250c001 subs r12, r0, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
792 b04: 0a00006c beq 0xcbc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
793 b08: e25cc001 subs r12, r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
794 b0c: 0a000032 beq 0xbdc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
795 b10: e25cc001 subs r12, r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
796 b14: 0a000024 beq 0xbac
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
797 b18: e25cc001 subs r12, r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
798 b1c: 0a000017 beq 0xb80
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
799 b20: e25cc001 subs r12, r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
800 b24: 0a00000c beq 0xb5c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
801 b28: e25cc001 subs r12, r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
802 b2c: 1a0000b2 bne 0xdfc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
803 b30: e3a00009 mov r0, #9 ; 0x9
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
804 b34: ebfffd80 bl 0x13c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
805 b38: e59f52c4 ldr r5, [pc, #708] ; 0xe04
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
806 b3c: e5d51008 ldrb r1, [r5, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
807 b40: e3a00004 mov r0, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
808 b44: eb000223 bl 0x13d8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
809 b48: e1a00005 mov r0, r5
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
810 b4c: ebfffd72 bl 0x11c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
811 b50: e3a0c001 mov r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
812 b54: e5c4c000 strb r12, [r4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
813 b58: ea0000a7 b 0xdfc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
814 b5c: e59f52a0 ldr r5, [pc, #672] ; 0xe04
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
815 b60: e1a00005 mov r0, r5
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
816 b64: ebfffd6c bl 0x11c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
817 b68: e5d51008 ldrb r1, [r5, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
818 b6c: e3a00004 mov r0, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
819 b70: eb000218 bl 0x13d8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
820 b74: e3a0c001 mov r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
821 b78: e5c4c000 strb r12, [r4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
822 b7c: ea00009e b 0xdfc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
823 b80: e3a00006 mov r0, #6 ; 0x6
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
824 b84: ebfffd6c bl 0x13c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
825 b88: e59f5274 ldr r5, [pc, #628] ; 0xe04
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
826 b8c: e5d51008 ldrb r1, [r5, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
827 b90: e3a00004 mov r0, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
828 b94: eb00020f bl 0x13d8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
829 b98: e1a00005 mov r0, r5
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
830 b9c: ebfffd5e bl 0x11c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
831 ba0: e3a0c001 mov r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
832 ba4: e5c4c000 strb r12, [r4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
833 ba8: ea000093 b 0xdfc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
834 bac: e59f0274 ldr r0, [pc, #628] ; 0xe28
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
835 bb0: e3a0c000 mov r12, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
836 bb4: e1c0c0b0 strh r12, [r0]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
837 bb8: ebfffedc bl 0x730
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
838 bbc: e3500000 cmp r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
839 bc0: 1a000002 bne 0xbd0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
840 bc4: e3a0c003 mov r12, #3 ; 0x3
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
841 bc8: e5c4c000 strb r12, [r4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
842 bcc: ea00008a b 0xdfc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
843 bd0: e3a0c001 mov r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
844 bd4: e5c4c000 strb r12, [r4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
845 bd8: ea000087 b 0xdfc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
846 bdc: e59f6220 ldr r6, [pc, #544] ; 0xe04
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
847 be0: e5d6c000 ldrb r12, [r6]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
848 be4: e35c0000 cmp r12, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
849 be8: 0a000011 beq 0xc34
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
850 bec: e35c0001 cmp r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
851 bf0: 0a00000f beq 0xc34
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
852 bf4: e35c0002 cmp r12, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
853 bf8: 0a00000d beq 0xc34
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
854 bfc: e35c0003 cmp r12, #3 ; 0x3
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
855 c00: 0a00000b beq 0xc34
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
856 c04: e35c0004 cmp r12, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
857 c08: 0a000009 beq 0xc34
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
858 c0c: e3a00002 mov r0, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
859 c10: ebfffd49 bl 0x13c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
860 c14: e5d61008 ldrb r1, [r6, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
861 c18: e3a00004 mov r0, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
862 c1c: eb0001ed bl 0x13d8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
863 c20: e1a00006 mov r0, r6
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
864 c24: ebfffd3c bl 0x11c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
865 c28: e3a0c001 mov r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
866 c2c: e5c4c000 strb r12, [r4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
867 c30: ea000071 b 0xdfc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
868 c34: e5d6500d ldrb r5, [r6, #13]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
869 c38: e1d6c0ba ldrh r12, [r6, #10]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
870 c3c: e20c001f and r0, r12, #31 ; 0x1f
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
871 c40: e20000ff and r0, r0, #255 ; 0xff
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
872 c44: e1a012ac mov r1, r12, lsr #5
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
873 c48: e201101f and r1, r1, #31 ; 0x1f
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
874 c4c: e20110ff and r1, r1, #255 ; 0xff
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
875 c50: e1a0c52c mov r12, r12, lsr #10
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
876 c54: e20cc01f and r12, r12, #31 ; 0x1f
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
877 c58: e20c20ff and r2, r12, #255 ; 0xff
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
878 c5c: e205c00f and r12, r5, #15 ; 0xf
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
879 c60: e20c30ff and r3, r12, #255 ; 0xff
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
880 c64: e1a0c225 mov r12, r5, lsr #4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
881 c68: e5cdc000 strb r12, [sp]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
882 c6c: eb00006e bl 0xe2c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
883 c70: e5d6c009 ldrb r12, [r6, #9]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
884 c74: e5d6000c ldrb r0, [r6, #12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
885 c78: e20c1003 and r1, r12, #3 ; 0x3
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
886 c7c: e20110ff and r1, r1, #255 ; 0xff
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
887 c80: e1a0c12c mov r12, r12, lsr #2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
888 c84: e20cc01f and r12, r12, #31 ; 0x1f
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
889 c88: e20c20ff and r2, r12, #255 ; 0xff
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
890 c8c: eb000098 bl 0xef4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
891 c90: e3a00001 mov r0, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
892 c94: ebfffd28 bl 0x13c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
893 c98: e5d60000 ldrb r0, [r6]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
894 c9c: e5d61008 ldrb r1, [r6, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
895 ca0: eb0001cc bl 0x13d8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
896 ca4: e59fc168 ldr r12, [pc, #360] ; 0xe14
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
897 ca8: e5960004 ldr r0, [r6, #4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
898 cac: e58c0000 str r0, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
899 cb0: e3a0c002 mov r12, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
900 cb4: e5c4c000 strb r12, [r4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
901 cb8: ea00004f b 0xdfc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
902 cbc: e59f0140 ldr r0, [pc, #320] ; 0xe04
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
903 cc0: ebfffd15 bl 0x11c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
904 cc4: e3a00000 mov r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
905 cc8: ebfffd1b bl 0x13c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
906 ccc: e3a0c002 mov r12, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
907 cd0: e5c4c000 strb r12, [r4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
908 cd4: ea000048 b 0xdfc
14
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
diff changeset
909 ; in the initial state, with [800108]==1, control comes here
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
910 cd8: e250c001 subs r12, r0, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
911 cdc: 0a000040 beq 0xde4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
912 ce0: e25cc001 subs r12, r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
913 ce4: 0a00000b beq 0xd18
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
914 ce8: e24cc001 sub r12, r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
915 cec: e35c0003 cmp r12, #3 ; 0x3
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
916 cf0: 8a000041 bhi 0xdfc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
917 cf4: e59f5108 ldr r5, [pc, #264] ; 0xe04
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
918 cf8: e1a00005 mov r0, r5
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
919 cfc: ebfffd06 bl 0x11c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
920 d00: e5d51008 ldrb r1, [r5, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
921 d04: e3a00004 mov r0, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
922 d08: eb0001b2 bl 0x13d8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
923 d0c: e3a0c001 mov r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
924 d10: e5c4c000 strb r12, [r4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
925 d14: ea000038 b 0xdfc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
926 d18: e59f60e4 ldr r6, [pc, #228] ; 0xe04
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
927 d1c: e5d6c000 ldrb r12, [r6]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
928 d20: e35c0000 cmp r12, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
929 d24: 0a00000c beq 0xd5c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
930 d28: e35c0001 cmp r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
931 d2c: 0a00000a beq 0xd5c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
932 d30: e35c0002 cmp r12, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
933 d34: 0a000008 beq 0xd5c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
934 d38: e35c0003 cmp r12, #3 ; 0x3
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
935 d3c: 0a000006 beq 0xd5c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
936 d40: e35c0004 cmp r12, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
937 d44: 0a000004 beq 0xd5c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
938 d48: e3a00002 mov r0, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
939 d4c: ebfffcfa bl 0x13c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
940 d50: e3a0c001 mov r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
941 d54: e5c4c000 strb r12, [r4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
942 d58: ea000027 b 0xdfc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
943 d5c: e5d6500d ldrb r5, [r6, #13]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
944 d60: e1d6c0ba ldrh r12, [r6, #10]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
945 d64: e20c001f and r0, r12, #31 ; 0x1f
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
946 d68: e20000ff and r0, r0, #255 ; 0xff
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
947 d6c: e1a012ac mov r1, r12, lsr #5
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
948 d70: e201101f and r1, r1, #31 ; 0x1f
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
949 d74: e20110ff and r1, r1, #255 ; 0xff
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
950 d78: e1a0c52c mov r12, r12, lsr #10
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
951 d7c: e20cc01f and r12, r12, #31 ; 0x1f
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
952 d80: e20c20ff and r2, r12, #255 ; 0xff
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
953 d84: e205c00f and r12, r5, #15 ; 0xf
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
954 d88: e20c30ff and r3, r12, #255 ; 0xff
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
955 d8c: e1a0c225 mov r12, r5, lsr #4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
956 d90: e5cdc000 strb r12, [sp]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
957 d94: eb000024 bl 0xe2c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
958 d98: e5d6c009 ldrb r12, [r6, #9]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
959 d9c: e5d6000c ldrb r0, [r6, #12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
960 da0: e20c1003 and r1, r12, #3 ; 0x3
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
961 da4: e20110ff and r1, r1, #255 ; 0xff
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
962 da8: e1a0c12c mov r12, r12, lsr #2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
963 dac: e20cc01f and r12, r12, #31 ; 0x1f
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
964 db0: e20c20ff and r2, r12, #255 ; 0xff
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
965 db4: eb00004e bl 0xef4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
966 db8: e3a00001 mov r0, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
967 dbc: ebfffcde bl 0x13c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
968 dc0: e5d60000 ldrb r0, [r6]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
969 dc4: e5d61008 ldrb r1, [r6, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
970 dc8: eb000182 bl 0x13d8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
971 dcc: e59f0040 ldr r0, [pc, #64] ; 0xe14
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
972 dd0: e596c004 ldr r12, [r6, #4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
973 dd4: e580c000 str r12, [r0]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
974 dd8: e3a0c002 mov r12, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
975 ddc: e5c4c000 strb r12, [r4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
976 de0: ea000005 b 0xdfc
14
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
diff changeset
977 ; response to '<i' is handled here
3443b1b08af4 boot ROM re: starting to unravel the serial command handling
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 13
diff changeset
978 de4: e59f0018 ldr r0, =0x800518 ; via 0xe04
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
979 de8: ebfffccb bl 0x11c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
980 dec: e3a00000 mov r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
981 df0: ebfffcd1 bl 0x13c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
982 df4: e3a0c001 mov r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
983 df8: e5c4c000 strb r12, [r4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
984 dfc: e28dd008 add sp, sp, #8 ; 0x8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
985 e00: e8bd8070 ldmia sp!, {r4, r5, r6, pc}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
986
12
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
987 ; literal pool
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
988 e04: 00800518
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
989 e08: 00001fcc
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
990 e0c: 0080010c
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
991 e10: 00800520
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
992 e14: 00800104
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
993 e18: 00800750
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
994 e1c: 0007f8af
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
995 e20: 000fffff
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
996 e24: 00800108
25b016d16602 boot ROM re: making inroads into the 0x2c8 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 11
diff changeset
997 e28: 00800528
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
998
4
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
999 ; The following routine performs basic sanity initialization
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1000 ; of the memory map and clocking.
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1001 ;
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1002 ; Arguments:
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1003 ; R0: WS setting for nCS0 (external ROM/flash)
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1004 ; R1: WS setting for nCS6 (internal RAM)
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1005 ; R2: WS setting for nCS7 (internal ROM)
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1006 ; R3: value to be written into bits <3:0> of FFFF:F900
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1007 ; stack arg: value to be written into bits <7:4> of FFFF:F900
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1008
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1009 e2c: e92d4070 stmdb sp!, {r4, r5, r6, lr}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1010 e30: e5dd5010 ldrb r5, [sp, #16]
3
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1011 ; mask all interrupts
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1012 e34: e59fc48c ldr r12, =0xFFFF ; via 0x12c8
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1013 e38: e59f4484 ldr r4, =0xFFFFFA08 ; via 0x12c4
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1014 e3c: e1c4c0b0 strh r12, [r4] ; 1st reg
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1015 e40: e59f4484 ldr r4, =0xFFFFFA0A ; via 0x12cc
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1016 e44: e1c4c0b0 strh r12, [r4] ; 2nd reg
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1017 ; disable the watchdog
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1018 e48: e59f4480 ldr r4, =0xFFFFF804 ; via 0x12d0
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1019 e4c: e3a0c0f5 mov r12, #245 ; 0xf5
3
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1020 e50: e1c4c0b0 strh r12, [r4] ; 1st write
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1021 e54: e3a0c0a0 mov r12, #160 ; 0xa0
3
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1022 e58: e1c4c0b0 strh r12, [r4] ; 2nd write
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1023 ; write 0x100 into the MCU memory map EXTRA_CONF register (FFFF:FB10)
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1024 ; forces the memory map to internal ROM, all other bits at
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1025 ; listed reset default values
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1026 e5c: e59f4470 ldr r4, =0xFFFFFB10 ; via 0x12d4
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1027 e60: e3a0cc01 mov r12, #256 ; 0x100
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1028 e64: e1c4c0b0 strh r12, [r4]
3
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1029 ; write 0xFF22 into FFFF:F900 in a convoluted way
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1030 e68: e59f6468 ldr r6, =0xFFFFFD00 ; via 0x12d8
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1031 e6c: e3a04b01 mov r4, #1024 ; 0x400
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1032 e70: e3a0c801 mov r12, #65536 ; 0x10000
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1033 e74: e24cc0de sub r12, r12, #222 ; 0xde
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1034 e78: e106c0b4 strh r12, [r6, -r4]
3
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1035 ; DPLL control register written with what looks like the reset default value
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1036 e7c: e59fc45c ldr r12, 0x2002 ; via 0x12e0
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1037 e80: e59f4454 ldr r4, =0xFFFF9800 ; via 0x12dc
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1038 e84: e1c4c0b0 strh r12, [r4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1039 e88: e1b04f8c movs r4, r12, lsl #31
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1040 e8c: 1afffffd bne 0xe88
3
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1041 ; write 0x1083 into FFFF:FD00
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1042 ; sets the MCU clock to come directly from VTCXO, bypassing DPLL
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1043 e90: e3a0c083 mov r12, #131 ; 0x83
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1044 e94: e28cca01 add r12, r12, #4096 ; 0x1000
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1045 e98: e1c6c0b0 strh r12, [r6]
3
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1046 ; clear bit 6 of FFFF:FD02 (set VCLKOUT-FR to /1)
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1047 e9c: e1d6c0b2 ldrh r12, [r6, #2]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1048 ea0: e20c40bf and r4, r12, #191 ; 0xbf
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1049 ea4: e20cccff and r12, r12, #65280 ; 0xff00
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1050 ea8: e184c00c orr r12, r4, r12
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1051 eac: e1c6c0b2 strh r12, [r6, #2]
4
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1052 ; program nCS0: WS as given by R0, 1 dummy cycle, enable writes
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1053 eb0: e3a0cc02 mov r12, #512 ; 0x200
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1054 eb4: e200001f and r0, r0, #31 ; 0x1f
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1055 eb8: e3800e2a orr r0, r0, #672 ; 0x2a0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1056 ebc: e10600bc strh r0, [r6, -r12]
4
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1057 ; program nCS6 (int RAM): WS as given by R1, common sense values for the rest
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1058 ec0: e3a0cf7d mov r12, #500 ; 0x1f4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1059 ec4: e201001f and r0, r1, #31 ; 0x1f
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1060 ec8: e38000c0 orr r0, r0, #192 ; 0xc0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1061 ecc: e10600bc strh r0, [r6, -r12]
4
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1062 ; program nCS7 (int ROM): same as nCS6, but WS as given by R2
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1063 ed0: e3a0cf7e mov r12, #504 ; 0x1f8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1064 ed4: e202001f and r0, r2, #31 ; 0x1f
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1065 ed8: e38000c0 orr r0, r0, #192 ; 0xc0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1066 edc: e10600bc strh r0, [r6, -r12]
4
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1067 ; program FFFF:F900 with {FF,stack_arg,R3}
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1068 ee0: e3a0cb01 mov r12, #1024 ; 0x400
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1069 ee4: e1830205 orr r0, r3, r5, lsl #4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1070 ee8: e3800cff orr r0, r0, #65280 ; 0xff00
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1071 eec: e10600bc strh r0, [r6, -r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1072 ef0: e8bd8070 ldmia sp!, {r4, r5, r6, pc}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1073
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1074 ; The routine at 0xef4 gets called from main() after a '<' character
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1075 ; has been received and autoboot thereby interrupted in the
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1076 ; autoboot-enabled flash state.
11
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1077 ;
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1078 ; Called with:
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1079 ; R0 = the byte from 800524
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1080 ; R1 = 1 (value for the PLL_DIV field)
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1081 ; R2 = 2 (value for the PLL_MULT field)
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1082
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1083 ef4: e92d4070 stmdb sp!, {r4, r5, r6, lr}
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1084 ef8: e59fc3e4 ldr r12, =0xFFFFF900 ; via 0x12e4
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1085 efc: e1dc40b0 ldrh r4, [r12]
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1086 ; original value of FFFF:F900 saved in R4
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1087 ; now set it to FF22, just like the 0xe2c init routine did
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1088 f00: e59f33d0 ldr r3, =0xFFFFFD00 ; via 0x12d8
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1089 f04: e3a05b01 mov r5, #1024 ; 0x400
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1090 f08: e3a0c801 mov r12, #65536 ; 0x10000
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1091 f0c: e24cc0de sub r12, r12, #222 ; 0xde
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1092 f10: e103c0b5 strh r12, [r3, -r5]
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1093 ; write 0x2002 to FFFF:9800, again just like 0xe2c did
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1094 f14: e59f63c0 ldr r6, =0xFFFF9800 ; via 0x12dc
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1095 f18: e59fc3c0 ldr r12, =0x2002 ; via 0x12e0
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1096 f1c: e1c6c0b0 strh r12, [r6]
11
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1097 ; the following 2 instructions would cause this code to hang
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1098 ; in a tight loop if the least significant bit of the above constant (0x2002)
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1099 ; were 1 - but it is 0...
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1100 f20: e1b05f8c movs r5, r12, lsl #31
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1101 f24: 1afffffd bne 0xf20
11
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1102 ; now write the same thing into FFFF:9800, but with the PLL_DIV and
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1103 ; PLL_MULT values from the function arguments ORed in
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1104 f28: e181c102 orr r12, r1, r2, lsl #2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1105 f2c: e1a0c28c mov r12, r12, lsl #5
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1106 f30: e38cc002 orr r12, r12, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1107 f34: e38cca02 orr r12, r12, #8192 ; 0x2000
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1108 f38: e1c6c0b0 strh r12, [r6]
11
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1109 ; now look if we are fed with 13 or 26 MHz
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1110 f3c: e3500001 cmp r0, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1111 f40: 0a000009 beq 0xf6c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1112 f44: e3500000 cmp r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1113 f48: 1a000006 bne 0xf68
11
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1114 ; 0 in R0, meaning 26 MHz in - set bit 6 in FFFF:FD02, selecting /2
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1115 f4c: e1d3c0b2 ldrh r12, [r3, #2]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1116 f50: e38cc040 orr r12, r12, #64 ; 0x40
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1117 f54: e1c3c0b2 strh r12, [r3, #2]
11
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1118 ; write 10A1 into FFFF:FD00, setting ARM clock to DPLL_CLKOUT/2
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1119 f58: e3a0c0a1 mov r12, #161 ; 0xa1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1120 f5c: e28cca01 add r12, r12, #4096 ; 0x1000
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1121 f60: e1c3c0b0 strh r12, [r3]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1122 f64: ea000008 b 0xf8c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1123 f68: eafffffe b 0xf68
11
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1124 ; 1 in R0, meaning 13 MHz in - clear bit 6 in FFFF:FD02, selecting /1
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1125 f6c: e1d3c0b2 ldrh r12, [r3, #2]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1126 f70: e20c00bf and r0, r12, #191 ; 0xbf
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1127 f74: e20cccff and r12, r12, #65280 ; 0xff00
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1128 f78: e180c00c orr r12, r0, r12
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1129 f7c: e1c3c0b2 strh r12, [r3, #2]
11
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1130 ; write 1081 into FFFF:FD00, setting ARM clock to DPLL_CLKOUT/1
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1131 f80: e3a0c081 mov r12, #129 ; 0x81
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1132 f84: e28cca01 add r12, r12, #4096 ; 0x1000
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1133 f88: e1c3c0b0 strh r12, [r3]
11
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1134 ; the two branches rejoin
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1135 ; set bit 4 in FFFF:9800 - enable PLL
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1136 f8c: e1d6c0b0 ldrh r12, [r6]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1137 f90: e38cc010 orr r12, r12, #16 ; 0x10
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1138 f94: e1a0c80c mov r12, r12, lsl #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1139 f98: e1a0c82c mov r12, r12, lsr #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1140 f9c: e1c6c0b0 strh r12, [r6]
11
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1141 ; the following 2 instructions would cause a dead hang if
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1142 ; bit 0 were already set in FFFF:9800, i.e., if the PLL were
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1143 ; already locked
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1144 fa0: e1b00f8c movs r0, r12, lsl #31
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1145 fa4: 1afffffd bne 0xfa0
11
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1146 ; restore saved value of FFFF:F900
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1147 fa8: e3a0cb01 mov r12, #1024 ; 0x400
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1148 fac: e10340bc strh r4, [r3, -r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1149 fb0: e8bd8070 ldmia sp!, {r4, r5, r6, pc}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1150
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1151 ; Routine 0xfb4 gets called from main() where the boot code is giving
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1152 ; the UARTs a chance to interrupt the autoboot process before transferring
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1153 ; control to the nCS0 image.
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1154 ;
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1155 ; Arguments: both R0 and R1 point to byte variables acting as additional
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1156 ; function outputs.
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1157 ;
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1158 ; If a '<' character is received on either UART, the function returns
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1159 ; without further fuss. If nothing was received on either UART, it
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1160 ; also returns without further fuss. However, if the "wrong" byte value
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1161 ; was received on either UART, the function flips the VCLKOUT_DIV2 bit
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1162 ; in the FFFF:FD02 register - it is the boot code's way of figuring out
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1163 ; whether the input clock is 13 or 26 MHz.
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1164 ;
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1165 ; Return values:
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1166 ; In R0: 1 if '<' received, 0 otherwise
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1167 ; In *R0: UART ID if '<' received, FF otherwise
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1168 ; In *R1: final state of the 800534 byte variable
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1169 ;
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1170 ; The latter variable records the state of the divide-by-2. On the first
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1171 ; try, the divide-by-2 is enabled, and the variable contains 0. When this
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1172 ; function disables the /2, the variable is set to 1. It keeps toggling
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1173 ; back and forth as wrong bytes come in.
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1174
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1175 fb4: e3a0c0ff mov r12, #255 ; 0xff
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1176 fb8: e5c0c000 strb r12, [r0]
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1177 ; check the MODEM UART first
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1178 fbc: e59fc324 ldr r12, =0xFFFF5000 ; via 0x12e8
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1179 fc0: e5dc2805 ldrb r2, [r12, #2053]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1180 fc4: e1b02f82 movs r2, r2, lsl #31
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1181 fc8: 1a000001 bne 0xfd4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1182 fcc: e3a02000 mov r2, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1183 fd0: ea000003 b 0xfe4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1184 fd4: e5dc2800 ldrb r2, [r12, #2048]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1185 fd8: e352003c cmp r2, #60 ; 0x3c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1186 fdc: 0a000024 beq 0x1074
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1187 fe0: e3a02001 mov r2, #1 ; 0x1
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1188 ; Control gets here if no '<' was received on the MODEM UART.
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1189 ; R2 contains 1 if some other byte value was received, or 0 if nothing.
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1190 ; Now check the IrDA UART.
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1191 fe4: e5dc3005 ldrb r3, [r12, #5]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1192 fe8: e1b03f83 movs r3, r3, lsl #31
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1193 fec: 1a000002 bne 0xffc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1194 ff0: e3520001 cmp r2, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1195 ff4: 0a000003 beq 0x1008
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1196 ff8: ea000015 b 0x1054
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1197 ffc: e5dcc000 ldrb r12, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1198 1000: e35c003c cmp r12, #60 ; 0x3c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1199 1004: 0a000017 beq 0x1068
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1200 ; control gets here if the "wrong" byte value was received on either UART
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1201 1008: e59fc2dc ldr r12, =0x800534 ; via 0x12ec
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1202 100c: e5dc0000 ldrb r0, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1203 1010: e3500000 cmp r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1204 1014: 1a000008 bne 0x103c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1205 1018: e3a00001 mov r0, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1206 101c: e5cc0000 strb r0, [r12]
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1207 1020: e59f02c8 ldr r0, =0xFFFFFD02 ; via 0x12f0
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1208 1024: e1d0c0b0 ldrh r12, [r0]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1209 1028: e20c20bf and r2, r12, #191 ; 0xbf
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1210 102c: e20cccff and r12, r12, #65280 ; 0xff00
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1211 1030: e182c00c orr r12, r2, r12
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1212 1034: e1c0c0b0 strh r12, [r0]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1213 1038: ea000005 b 0x1054
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1214 103c: e3a00000 mov r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1215 1040: e5cc0000 strb r0, [r12]
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1216 1044: e59fc2a4 ldr r12, =0xFFFFFD02 ; via 0x12f0
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1217 1048: e1dc00b0 ldrh r0, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1218 104c: e3800040 orr r0, r0, #64 ; 0x40
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1219 1050: e1cc00b0 strh r0, [r12]
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1220 1054: e59fc290 ldr r12, =0x800534 ; via 0x12ec
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1221 1058: e5dcc000 ldrb r12, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1222 105c: e5c1c000 strb r12, [r1]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1223 1060: e3a00000 mov r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1224 1064: e12fff1e bx lr
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1225 ; control gets here if a '<' character was received on the IrDA UART
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1226 1068: e3a0c001 mov r12, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1227 106c: e5c0c000 strb r12, [r0]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1228 1070: ea000001 b 0x107c
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1229 ; control gets here if a '<' character was received on the MODEM UART
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1230 1074: e3a0c000 mov r12, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1231 1078: e5c0c000 strb r12, [r0]
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1232 107c: e59fc268 ldr r12, =0x800534 ; via 0x12ec
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1233 1080: e5dcc000 ldrb r12, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1234 1084: e5c1c000 strb r12, [r1]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1235 1088: e3a00001 mov r0, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1236 108c: e12fff1e bx lr
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1237
11
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1238 ; 0x1090 - the main routine for the UART download mode. Called with R0=0
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1239 ; if there is no valid image in flash, or with R0=1 if a valid image is
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1240 ; present, but the autoboot was interrupted by '<' coming in on a UART.
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1241
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1242 1090: e92d4070 stmdb sp!, {r4, r5, r6, lr}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1243 1094: e24dd00c sub sp, sp, #12 ; 0xc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1244 1098: e1a05000 mov r5, r0
11
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1245 109c: e59f4250 ldr r4, =0x800518 ; via 0x12f4
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1246 10a0: e2846008 add r6, r4, #8 ; R6=0x800520
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1247 10a4: e3a0c000 mov r12, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1248 10a8: e5cdc008 strb r12, [sp, #8]
11
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1249 ; If the argument was 0, meaning that no valid image was found in the
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1250 ; flash and no wait for '<' was done, that logic is repeated here,
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1251 ; exactly as in main() when the flash does contain a bootable image.
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1252 10ac: e3550000 cmp r5, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1253 10b0: 1a000009 bne 0x10dc
11
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1254 10b4: e59f123c ldr r1, =0x800524 ; via 0x12f8
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1255 10b8: e1a00006 mov r0, r6
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1256 10bc: ebffffbc bl 0xfb4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1257 10c0: e3500001 cmp r0, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1258 10c4: 1a000004 bne 0x10dc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1259 10c8: e5d4000c ldrb r0, [r4, #12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1260 10cc: e3a01001 mov r1, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1261 10d0: e3a02002 mov r2, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1262 10d4: ebffff86 bl 0xef4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1263 10d8: ea000001 b 0x10e4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1264 10dc: e3550001 cmp r5, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1265 10e0: 1afffff1 bne 0x10ac
11
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1266 ; no-image and interrupt-boot code paths merge here
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1267 10e4: e28d0008 add r0, sp, #8 ; 0x8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1268 10e8: ebfffc76 bl 0x2c8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1269 10ec: e5ddc008 ldrb r12, [sp, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1270 10f0: e35c0000 cmp r12, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1271 10f4: 0a00000d beq 0x1130
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1272 10f8: e5dd0008 ldrb r0, [sp, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1273 10fc: ebfffdec bl 0x8b4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1274 1100: ea00000a b 0x1130
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1275 1104: e5d4000c ldrb r0, [r4, #12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1276 1108: e3a01001 mov r1, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1277 110c: e3a02002 mov r2, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1278 1110: ebffff77 bl 0xef4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1279 1114: e3a0c002 mov r12, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1280 1118: e5cdc000 strb r12, [sp]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1281 111c: e3a00004 mov r0, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1282 1120: e3a01000 mov r1, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1283 1124: e3a02000 mov r2, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1284 1128: e3a03002 mov r3, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1285 112c: ebffff3e bl 0xe2c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1286 1130: e5d40008 ldrb r0, [r4, #8]
11
a51729642295 boot ROM re: got to the 0x1090 routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 8
diff changeset
1287 1134: e59fc1c0 ldr r12, =0x800104 ; via 0x12fc
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1288 1138: e59c1000 ldr r1, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1289 113c: e28d2009 add r2, sp, #9 ; 0x9
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1290 1140: eb0000b8 bl 0x1428
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1291 1144: e3500001 cmp r0, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1292 1148: 1afffff8 bne 0x1130
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1293 114c: e5ddc009 ldrb r12, [sp, #9]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1294 1150: e35c003c cmp r12, #60 ; 0x3c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1295 1154: 1afffff5 bne 0x1130
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1296 1158: e28d0008 add r0, sp, #8 ; 0x8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1297 115c: ebfffc59 bl 0x2c8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1298 1160: e3500001 cmp r0, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1299 1164: 1affffe6 bne 0x1104
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1300 1168: e5ddc008 ldrb r12, [sp, #8]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1301 116c: e35c0000 cmp r12, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1302 1170: 1affffe0 bne 0x10f8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1303 1174: eaffffed b 0x1130
5
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1304
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1305 ; This function takes a few peeks at the external boot memory on nCS0.
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1306 ; It appears that the intent is to return 1 if a valid image is present
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1307 ; in the external flash, or 0 otherwise.
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1308 ;
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1309 ; The first check is the 32-bit word at 0x2000. If that word equals 0,
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1310 ; the function returns 1. Otherwise, that word is expected to equal 1:
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1311 ; if it doesn't, the function returns 0.
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1312 ;
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1313 ; If the word at 2000 is 00000001 (like it is on Closedmoko phones,
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1314 ; for example), the IRQ vector in the flash image (where the ARM core
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1315 ; would vector if the Calypso register were flipped to put nCS0 at 0x0)
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1316 ; is checked. If the vector location contains an unconditional branch
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1317 ; instruction (0xEAxxxxxx) and the 32-bit instruction word at the target
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1318 ; of that branch is something other than 0xFFFFFFFF, the function
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1319 ; returns 1; otherwise it returns 0.
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1320
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1321 1178: e3a0ca02 mov r12, #8192 ; 0x2000
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1322 117c: e59cc000 ldr r12, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1323 1180: e35c0000 cmp r12, #0 ; 0x0
5
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1324 1184: 0a000011 beq 0x11d0 ; return 1
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1325 1188: e35c0001 cmp r12, #1 ; 0x1
5
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1326 118c: 1a00000d bne 0x11c8 ; return 0
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1327 1190: e3a0c018 mov r12, #24 ; 0x18
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1328 1194: e28cc403 add r12, r12, #50331648 ; 0x3000000
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1329 1198: e59cc000 ldr r12, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1330 119c: e20c04ff and r0, r12, #-16777216 ; 0xff000000
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1331 11a0: e3700416 cmn r0, #369098752 ; 0x16000000
5
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1332 11a4: 1a000007 bne 0x11c8 ; return 0
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1333 11a8: e3a00018 mov r0, #24 ; 0x18
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1334 11ac: e2800403 add r0, r0, #50331648 ; 0x3000000
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1335 11b0: e28cc002 add r12, r12, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1336 11b4: e1a0c10c mov r12, r12, lsl #2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1337 11b8: e3ccc4ff bic r12, r12, #-16777216 ; 0xff000000
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1338 11bc: e790c00c ldr r12, [r0, r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1339 11c0: e37c0001 cmn r12, #1 ; 0x1
5
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1340 11c4: 1a000001 bne 0x11d0 ; return 1
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1341 11c8: e3a00000 mov r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1342 11cc: e1a0f00e mov pc, lr
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1343 11d0: e3a00001 mov r0, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1344 11d4: e1a0f00e mov pc, lr
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1345
3
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1346 ; main() entry point
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1347 11d8: e92d4070 stmdb sp!, {r4, r5, r6, lr}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1348 11dc: e24dd008 sub sp, sp, #8 ; 0x8
4
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1349 ; 0xe2c basic memmap/clock init routine called with the following
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1350 ; values: WS=4 for nCS0, WS=0 for nCS6 and nCS7, FF22 into FFFF:F900
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1351 11e0: e3a0c002 mov r12, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1352 11e4: e5cdc000 strb r12, [sp]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1353 11e8: e3a00004 mov r0, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1354 11ec: e3a01000 mov r1, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1355 11f0: e3a02000 mov r2, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1356 11f4: e3a03002 mov r3, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1357 11f8: ebffff0b bl 0xe2c
4
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1358 11fc: eb00004f bl 0x1340 ; init UARTs
5
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1359 ; write 0x1D4C0 into 800104 - even though it was already done by the
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1360 ; bulk RAM init routine at 0x1500
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1361 1200: e59f00f4 ldr r0, =0x800104 ; via 0x12fc
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1362 1204: e3a0c802 mov r12, #131072 ; 0x20000
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1363 1208: e24ccdad sub r12, r12, #11072 ; 0x2b40
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1364 120c: e580c000 str r12, [r0]
5
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1365 ; set bit 6 in FFFF:FD02 (set VCLKOUT-FR to /2)
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1366 1210: e59f60d8 ldr r6, =0xFFFFFD02 ; via 0x12f0
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1367 1214: e1d6c0b0 ldrh r12, [r6]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1368 1218: e38cc040 orr r12, r12, #64 ; 0x40
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1369 121c: e1c6c0b0 strh r12, [r6]
5
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1370 ; Check for a valid image in flash. If there doesn't seem to be one,
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1371 ; call the 0x1090 routine. The latter seems to never return, so it is
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1372 ; probably the endless wait for UART download function.
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1373 1220: ebffffd4 bl 0x1178 ; check for valid img in flash
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1374 1224: e3500000 cmp r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1375 1228: 1a000001 bne 0x1234
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1376 122c: e3a00000 mov r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1377 1230: ebffff96 bl 0x1090
5
9db4dcf94128 boot ROM re: making inroads into the flash image validity criteria
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 4
diff changeset
1378 ; A valid image is present.
6
8c2621b2ed37 boot ROM re: further understanding of the external flash image booting
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 5
diff changeset
1379 ; set bit 6 in FFFF:FD02 again
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1380 1234: e1d6c0b0 ldrh r12, [r6]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1381 1238: e38cc040 orr r12, r12, #64 ; 0x40
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1382 123c: e1c6c0b0 strh r12, [r6]
6
8c2621b2ed37 boot ROM re: further understanding of the external flash image booting
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 5
diff changeset
1383 1240: e59f10b0 ldr r1, =0x800524 ; via 0x12f8
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1384 1244: e2415004 sub r5, r1, #4 ; 0x4
6
8c2621b2ed37 boot ROM re: further understanding of the external flash image booting
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 5
diff changeset
1385 1248: e59f40b0 ldr r4, =0x373C ; via 0x1300
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1386 ; the retry count loaded into R4 is 14140 in decimal
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1387 124c: e1a00005 mov r0, r5
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1388 ; call made with R0=0x800520, R1=0x800524
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1389 1250: ebffff57 bl 0xfb4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1390 1254: e3500000 cmp r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1391 1258: 1a000001 bne 0x1264
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1392 125c: e2544001 subs r4, r4, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1393 1260: 1afffff9 bne 0x124c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1394 1264: e3500001 cmp r0, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1395 1268: 0a00000c beq 0x12a0
6
8c2621b2ed37 boot ROM re: further understanding of the external flash image booting
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 5
diff changeset
1396 ; clear bit 6 in FFFF:FD02
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1397 126c: e1d6c0b0 ldrh r12, [r6]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1398 1270: e20c00bf and r0, r12, #191 ; 0xbf
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1399 1274: e20cccff and r12, r12, #65280 ; 0xff00
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1400 1278: e180c00c orr r12, r0, r12
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1401 127c: e1c6c0b0 strh r12, [r6]
6
8c2621b2ed37 boot ROM re: further understanding of the external flash image booting
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 5
diff changeset
1402 ; transfer control to the flash image?
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1403 1280: e3a0ca02 mov r12, #8192 ; 0x2000
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1404 1284: e59c0000 ldr r0, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1405 1288: e1b010a0 movs r1, r0, lsr #1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1406 128c: 1a000002 bne 0x129c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1407 1290: e59c1004 ldr r1, [r12, #4]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1408 1294: eb0000bc bl 0x158c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1409 1298: eafffffe b 0x1298
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1410 129c: eafffffe b 0x129c
6
8c2621b2ed37 boot ROM re: further understanding of the external flash image booting
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 5
diff changeset
1411 ; interactive mode entry?
8c2621b2ed37 boot ROM re: further understanding of the external flash image booting
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 5
diff changeset
1412 12a0: e59fc050 ldr r12, =0x800524 ; via 0x12f8
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1413 12a4: e5dc0000 ldrb r0, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1414 12a8: e3a01001 mov r1, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1415 12ac: e3a02002 mov r2, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1416 12b0: ebffff0f bl 0xef4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1417 12b4: e3a00001 mov r0, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1418 12b8: ebffff74 bl 0x1090
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1419 12bc: e28dd008 add sp, sp, #8 ; 0x8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1420 12c0: e8bd8070 ldmia sp!, {r4, r5, r6, pc}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1421
3
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1422 ; literal pool
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1423 12c4: fffffa08
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1424 12c8: 0000ffff
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1425 12cc: fffffa0a
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1426 12d0: fffff804
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1427 12d4: fffffb10
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1428 12d8: fffffd00
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1429 12dc: ffff9800
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1430 12e0: 00002002
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1431 12e4: fffff900
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1432 12e8: ffff5000
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1433 12ec: 00800534
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1434 12f0: fffffd02
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1435 12f4: 00800518
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1436 12f8: 00800524
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1437 12fc: 00800104
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1438 1300: 0000373c
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1439
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1440 ; Routine 0x1304: emit a character string through a UART
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1441 ;
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1442 ; Arguments:
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1443 : R0: pointer to the string
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1444 ; R1: number of characters (bytes) to transmit
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1445 ; R2: UART ID (0=MODEM, 1=IrDA)
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1446
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1447 1304: e3510000 cmp r1, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1448 1308: 012fff1e bxeq lr
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1449 130c: e59fc178 ldr r12, =0x1FCC ; via 0x148c
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1450 1310: e79cc102 ldr r12, [r12, r2, lsl #2]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1451 1314: e28c3005 add r3, r12, #5 ; 0x5
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1452 1318: e5d32000 ldrb r2, [r3]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1453 131c: e3120020 tst r2, #32 ; 0x20
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1454 1320: 0afffffc beq 0x1318
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1455 1324: e4d02001 ldrb r2, [r0], #1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1456 1328: e5cc2000 strb r2, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1457 132c: e2411001 sub r1, r1, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1458 1330: e1a01801 mov r1, r1, lsl #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1459 1334: e1b01821 movs r1, r1, lsr #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1460 1338: 1afffff6 bne 0x1318
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1461 133c: e12fff1e bx lr
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1462
4
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1463 ; The following routine initializes both UARTs with a fixed set of
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1464 ; parameters (the same for both UARTs).
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1465
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1466 1340: e92d4ff0 stmdb sp!, {r4, r5, r6, r7, r8, r9, r10, r11, lr}
4
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1467 ; UIR fiddling: connect the MODEM UART to the MCU
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1468 ; and restore normal operation (interrupts NOT masked at UIR level)
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1469 1344: e59fc144 ldr r12, =0xFFFF6000 ; via 0x1490
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1470 1348: e5dc0000 ldrb r0, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1471 134c: e3800002 orr r0, r0, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1472 1350: e5cc0000 strb r0, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1473 1354: e5dc0000 ldrb r0, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1474 1358: e20000fe and r0, r0, #254 ; 0xfe
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1475 135c: e5cc0000 strb r0, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1476 1360: e5dc0000 ldrb r0, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1477 1364: e20000fd and r0, r0, #253 ; 0xfd
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1478 1368: e5cc0000 strb r0, [r12]
4
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1479 ; actual UART register diddling: prepare the values for both UARTs
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1480 136c: e3a0b003 mov r11, #3 ; 0x3
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1481 1370: e3a05000 mov r5, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1482 1374: e3a0a02a mov r10, #42 ; 0x2a
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1483 1378: e3a09080 mov r9, #128 ; 0x80
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1484 137c: e3a070bf mov r7, #191 ; 0xbf
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1485 1380: e3a04007 mov r4, #7 ; 0x7
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1486 1384: e3a02002 mov r2, #2 ; 0x2
4
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1487 ; loop over the 2 UART base addresses
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1488 1388: e59f60fc ldr r6, =0x1FCC ; via 0x148c
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1489 138c: e496c004 ldr r12, [r6], #4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1490 1390: e28c3008 add r3, r12, #8 ; 0x8
4
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1491 ; R3 points to register 8 (MDR1)
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1492 ; write 07 into it: reset mode
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1493 1394: e5c34000 strb r4, [r3]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1494 1398: e28c0003 add r0, r12, #3 ; 0x3
4
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1495 ; R0 points to register 3 (LCR)
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1496 ; write BF into it: map in the extended registers
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1497 139c: e5c07000 strb r7, [r0]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1498 13a0: e28c1002 add r1, r12, #2 ; 0x2
4
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1499 ; R1 points to register 2: EFR under current mapping
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1500 ; set bit 4: enable enhanced functions
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1501 13a4: e5d18000 ldrb r8, [r1]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1502 13a8: e3888010 orr r8, r8, #16 ; 0x10
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1503 13ac: e5c18000 strb r8, [r1]
4
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1504 ; write 80 into LCR: map in the baud rate divisor registers
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1505 13b0: e5c09000 strb r9, [r0]
4
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1506 ; reg 2 (pointed to by R1) is now IIR/FCR
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1507 ; write 07 into FCR: FIFOs enabled and cleared, no DMA
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1508 13b4: e5c14000 strb r4, [r1]
4
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1509 ; write BF into LCR again
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1510 13b8: e5c07000 strb r7, [r0]
4
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1511 ; load baud rate divisor /42
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1512 13bc: e5cca000 strb r10, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1513 13c0: e5cc5001 strb r5, [r12, #1]
4
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1514 ; write 03 into LCR: restore normal registers, 8N1
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1515 13c4: e5c0b000 strb r11, [r0]
4
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1516 ; write 00 into MDR1: plain UART mode
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1517 13c8: e5c35000 strb r5, [r3]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1518 13cc: e2522001 subs r2, r2, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1519 13d0: 1affffed bne 0x138c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1520 13d4: e8bd8ff0 ldmia sp!, {r4, r5, r6, r7, r8, r9, r10, r11, pc}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1521
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1522 ; The following routine switches a UART to a different baud rate.
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1523 ; Arguments:
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1524 ; R0: baud rate index from the table at 0x1FD4
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1525 ; R1: UART ID (0=MODEM, 1=IrDA)
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1526
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1527 13d8: e59fc0ac ldr r12, =0x1FCC ; via 0x148c
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1528 13dc: e79c2101 ldr r2, [r12, r1, lsl #2]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1529 13e0: e282c005 add r12, r2, #5 ; 0x5
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1530 13e4: e5dc1000 ldrb r1, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1531 13e8: e3110040 tst r1, #64 ; 0x40
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1532 13ec: 0afffffc beq 0x13e4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1533 13f0: e282c003 add r12, r2, #3 ; 0x3
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1534 13f4: e5dc1000 ldrb r1, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1535 13f8: e3811080 orr r1, r1, #128 ; 0x80
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1536 13fc: e5cc1000 strb r1, [r12]
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1537 1400: e59f108c ldr r1, =0x1FD4 ; via 0x1494
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1538 1404: e7d13080 ldrb r3, [r1, r0, lsl #1]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1539 1408: e5c23001 strb r3, [r2, #1]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1540 140c: e0810080 add r0, r1, r0, lsl #1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1541 1410: e5d00001 ldrb r0, [r0, #1]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1542 1414: e5c20000 strb r0, [r2]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1543 1418: e5dc0000 ldrb r0, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1544 141c: e200007f and r0, r0, #127 ; 0x7f
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1545 1420: e5cc0000 strb r0, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1546 1424: e12fff1e bx lr
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1547
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1548 ; 0x1428 - UART read Rx character routine
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1549 ;
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1550 ; Arguments:
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1551 ; R0: UART ID (0=MODEM, 1=IrDA)
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1552 ; R1: poll repeat count, 0 means wait forever
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1553 ; R2: pointer to buffer where the received booty is stored
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1554 ;
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1555 ; Return value: 1 if a character was received, 0 otherwise
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1556
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1557 1428: e3510000 cmp r1, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1558 142c: 1a000006 bne 0x144c
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1559 1430: e59fc054 ldr r12, =0x1FCC ; via 0x148c
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1560 1434: e79cc100 ldr r12, [r12, r0, lsl #2]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1561 1438: e28c1005 add r1, r12, #5 ; 0x5
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1562 143c: e5d10000 ldrb r0, [r1]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1563 1440: e1b00f80 movs r0, r0, lsl #31
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1564 1444: 0afffffc beq 0x143c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1565 1448: ea000009 b 0x1474
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1566 144c: e59fc038 ldr r12, =0x1FCC ; via 0x148c
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1567 1450: e79cc100 ldr r12, [r12, r0, lsl #2]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1568 1454: e28c3005 add r3, r12, #5 ; 0x5
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1569 1458: e5d30000 ldrb r0, [r3]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1570 145c: e1b00f80 movs r0, r0, lsl #31
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1571 1460: 1a000001 bne 0x146c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1572 1464: e2511001 subs r1, r1, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1573 1468: 1afffffa bne 0x1458
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1574 146c: e3510000 cmp r1, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1575 1470: 0a000003 beq 0x1484
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1576 1474: e5dcc000 ldrb r12, [r12]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1577 1478: e5c2c000 strb r12, [r2]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1578 147c: e3a00001 mov r0, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1579 1480: e12fff1e bx lr
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1580 1484: e3a00000 mov r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1581 1488: e12fff1e bx lr
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1582
4
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1583 ; literal pool
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1584 148c: 00001fcc
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1585 1490: ffff6000
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1586 1494: 00001fd4
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1587
2
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1588 ; The RESET entry point branches here
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1589 ;
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1590 ; First order of business: copy the 7 vector instructions from
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1591 ; 0x1FE0 to 0x80001C.
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1592 1498: e59f003c ldr r0, =0x1FE0 ; via 0x14dc
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1593 149c: e59f103c ldr r1, =0x80001C ; via 0x14e0
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1594 14a0: e3a02000 mov r2, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1595 14a4: e7903002 ldr r3, [r0, r2]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1596 14a8: e7813002 str r3, [r1, r2]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1597 14ac: e2822004 add r2, r2, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1598 14b0: e352001c cmp r2, #28 ; 0x1c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1599 14b4: 1afffffa bne 0x14a4
2
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1600 ; done with that; now set up the stack
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1601 14b8: e59f0014 ldr r0, =0x8005C0 ; via 0x14d4
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1602 14bc: e59f1014 ldr r1, =0x190 ; via 0x14d8
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1603 14c0: e2411004 sub r1, r1, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1604 14c4: e0802001 add r2, r0, r1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1605 14c8: e3c22003 bic r2, r2, #3 ; 0x3
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1606 14cc: e1a0d002 mov sp, r2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1607 14d0: ea000003 b 0x14e4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1608
2
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1609 ; literals for the above code
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1610 14d4: 008005c0
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1611 14d8: 00000190
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1612 14dc: 00001fe0
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1613 14e0: 0080001c
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1614
2
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1615 ; continuation of the RESET entry code
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1616 14e4: e59f0078 ldr r0, =0x1694 ; via 0x1564
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1617 14e8: e3700001 cmn r0, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1618 14ec: 1b000003 blne 0x1500
3
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1619 14f0: ebffff38 bl 0x11d8 ; main()
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1620 ; only tight-loop halts from here on
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1621 14f4: e3a00001 mov r0, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1622 14f8: eb000022 bl 0x1588
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1623 14fc: eafffffe b 0x14fc
2
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1624
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1625 ; 0x1500: Subroutine entry
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1626 ;
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1627 ; This routine initializes multiple RAM areas from a single ROM init data
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1628 ; table. Takes one argument in R0, which points to the ROM table.
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1629 ; The ROM table consists of one or more abutted variable-length records,
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1630 ; each of the following format:
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1631 ;
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1632 ; 1 word: number of bytes to copy (may or may not be word-aligned)
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1633 ; 1 word: copy destination address (ditto)
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1634 ; variable length: data to be copied
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1635 ; 0 to 3 bytes of padding to put the next record on a word boundary
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1636 ;
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1637 ; The list is terminated by a zero word.
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1638
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1639 1500: ea000011 b 0x154c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1640 1504: e4901004 ldr r1, [r0], #4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1641 1508: e3110003 tst r1, #3 ; 0x3
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1642 150c: 1a000007 bne 0x1530
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1643 1510: e2522004 subs r2, r2, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1644 1514: 4a000003 bmi 0x1528
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1645 1518: e4903004 ldr r3, [r0], #4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1646 151c: e4813004 str r3, [r1], #4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1647 1520: e2522004 subs r2, r2, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1648 1524: 5afffffb bpl 0x1518
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1649 1528: e2922004 adds r2, r2, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1650 152c: 0a000003 beq 0x1540
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1651 1530: e4d03001 ldrb r3, [r0], #1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1652 1534: e4c13001 strb r3, [r1], #1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1653 1538: e2522001 subs r2, r2, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1654 153c: 1afffffb bne 0x1530
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1655 1540: e3100003 tst r0, #3 ; 0x3
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1656 1544: 13c00003 bicne r0, r0, #3 ; 0x3
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1657 1548: 12800004 addne r0, r0, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1658 154c: e4902004 ldr r2, [r0], #4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1659 1550: e3520000 cmp r2, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1660 1554: 1affffea bne 0x1504
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1661 1558: e1a0f00e mov pc, lr
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1662
2
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1663 ; literal pool
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1664 155c: 008005c0 ; low address of the stack - unused duplicate?
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1665 1560: 00000190 ; size of the stack - ditto
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1666 1564: 00001694
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1667
3
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1668 ; The following looks like the TI compiler's IND_CALL library helper
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1669
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1670 1568: e3140001 tst r4, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1671 156c: 1a000000 bne 0x1574
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1672 1570: e12fff14 bx r4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1673 1574: e1a0c004 mov r12, r4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1674 1578: e1a0400e mov r4, lr
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1675 157c: e28fe001 add lr, pc, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1676 1580: e12fff1c bx r12
3
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1677 1584: 4720 bx r4
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1678 1586: 46c0 nop (mov r8, r8)
2
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1679
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1680 1588: eafffffe b 0x1588
2
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1681
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1682 ; This routine effects the transfer of control to the flash (nCS0)
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1683 ; application image of the type indicated by the argument in R0.
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1684 ; The latter argument is the word read from 0x2000.
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1685 ; R1 contains the word read from 0x2004.
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1686
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1687 158c: e92d4010 stmdb sp!, {r4, lr}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1688 1590: e1a04000 mov r4, r0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1689 1594: e1b0c0a4 movs r12, r4, lsr #1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1690 1598: 0a000001 beq 0x15a4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1691 159c: e3a00001 mov r0, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1692 15a0: e8bd8010 ldmia sp!, {r4, pc}
6
8c2621b2ed37 boot ROM re: further understanding of the external flash image booting
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 5
diff changeset
1693 15a4: e59f0054 ldr r0, =0xFFFFFB10 ; via 0x1600
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1694 15a8: e1d0c0b0 ldrh r12, [r0]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1695 15ac: e20c20ff and r2, r12, #255 ; 0xff
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1696 15b0: e20ccb3f and r12, r12, #64512 ; 0xfc00
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1697 15b4: e182c00c orr r12, r2, r12
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1698 15b8: e1a0c80c mov r12, r12, lsl #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1699 15bc: e1a0c82c mov r12, r12, lsr #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1700 15c0: e3540000 cmp r4, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1701 15c4: 1a000004 bne 0x15dc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1702 15c8: e38ccc01 orr r12, r12, #256 ; 0x100
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1703 15cc: e1c0c0b0 strh r12, [r0]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1704 15d0: e1a04001 mov r4, r1
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1705 15d4: ebffffe3 bl 0x1568 ; IND_CALL
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1706 15d8: e8bd8010 ldmia sp!, {r4, pc}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1707 15dc: e3540001 cmp r4, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1708 15e0: 18bd8010 ldmneia sp!, {r4, pc}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1709 15e4: e3a00020 mov r0, #32 ; 0x20
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1710 15e8: e3a010cc mov r1, #204 ; 0xcc
6
8c2621b2ed37 boot ROM re: further understanding of the external flash image booting
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 5
diff changeset
1711 15ec: e59f2010 ldr r2, =0x800038 ; via 0x1604
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1712 15f0: eb000019 bl 0x165c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1713 15f4: e1a00004 mov r0, r4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1714 15f8: eb1ffa8e bl 0x800038
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1715 15fc: e8bd8010 ldmia sp!, {r4, pc}
3
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1716
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1717 ; literal pool
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1718 1600: fffffb10
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1719 1604: 00800038
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1720
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1721 ; This routine computes a simple word-wise (16 bits at a time) sum of
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1722 ; the present internal boot ROM code (ignoring carry-outs), and returns
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1723 ; it in R0. The upper 16 bits of the R0 return value will always be 0.
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1724 ;
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1725 ; If the argument in R0 equals 1, a call to the 0xe2c memmap/clock init
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1726 ; function is made first, with the same arguments as at the beginning
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1727 ; of main().
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1728
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1729 1608: e92d4000 stmdb sp!, {lr}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1730 160c: e24dd008 sub sp, sp, #8 ; 0x8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1731 1610: e3500001 cmp r0, #1 ; 0x1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1732 1614: 1a000006 bne 0x1634
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1733 ; 0xe2c routine is called with the same arguments as at the beginning
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1734 ; of main()
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1735 1618: e3a0c002 mov r12, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1736 161c: e5cdc000 strb r12, [sp]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1737 1620: e3a00004 mov r0, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1738 1624: e3a01000 mov r1, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1739 1628: e3a02000 mov r2, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1740 162c: e3a03002 mov r3, #2 ; 0x2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1741 1630: ebfffdfd bl 0xe2c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1742 1634: e3a00000 mov r0, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1743 1638: e3a0c000 mov r12, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1744 163c: e0dc10b2 ldrh r1, [r12], #2
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1745 1640: e0810000 add r0, r1, r0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1746 1644: e1a00800 mov r0, r0, lsl #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1747 1648: e1a00820 mov r0, r0, lsr #16
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1748 164c: e35c0a02 cmp r12, #8192 ; 0x2000
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1749 1650: 3afffff9 bcc 0x163c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1750 1654: e28dd008 add sp, sp, #8 ; 0x8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1751 1658: e8bd8000 ldmia sp!, {pc}
3
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1752
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1753 ; The following is a bcopy/memcpy-like routine, but with arguments
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1754 ; in the wrong order (matching neither bcopy nor memcpy):
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1755 ;
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1756 ; R0: source address
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1757 ; R1: # of bytes to copy
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1758 ; R2: dest address
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1759 ;
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1760 ; The addresses must be word-aligned, the length must be a multiple of 4.
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1761 ; Zero length is OK (no-op).
e3f8fe6a848e boot ROM re: started on main() and the 0xe2c routine
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 2
diff changeset
1762
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1763 165c: e3510000 cmp r1, #0 ; 0x0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1764 1660: 012fff1e bxeq lr
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1765 1664: e490c004 ldr r12, [r0], #4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1766 1668: e482c004 str r12, [r2], #4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1767 166c: e2511004 subs r1, r1, #4 ; 0x4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1768 1670: 1afffffb bne 0x1664
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1769 1674: e12fff1e bx lr
2
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1770
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1771 ; The soft-vector pointers at 0x800000 are initially set to point
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1772 ; to the ROM addresses of the following 7 tight-loop branch instructions:
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1773 1678: eafffffe b 0x1678
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1774 167c: eafffffe b 0x167c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1775 1680: eafffffe b 0x1680
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1776 1684: eafffffe b 0x1684
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1777 1688: eafffffe b 0x1688
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1778 168c: eafffffe b 0x168c
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1779 1690: eafffffe b 0x1690
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1780
2
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1781 ; RAM init table for the 0x1500 subroutine
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1782 ; vector init
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1783 1694: 0000001c
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1784 1698: 00800000
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1785 169c: 00001678
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1786 16a0: 0000167c
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1787 16a4: 00001680
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1788 16a8: 00001684
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1789 16ac: 00001688
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1790 16b0: 0000168c
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1791 16b4: 00001690
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1792 ; another record
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1793 16b8: 00000004
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1794 16bc: 00800104
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1795 16c0: 0001d4c0
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1796 ; another record
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1797 16c4: 00000001
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1798 16c8: 00800108
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1799 16cc: 00000001
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1800 ; another record
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1801 16d0: 00000001
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1802 16d4: 00800534
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1803 16d8: 00000000
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1804 ; end marker
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1805 16dc: 00000000
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1806
979d97fe75eb boot ROM rev eng: progressing on the RESET code
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 1
diff changeset
1807 ; The word at 0x16DC appears to be the last word of the actual boot
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1808 ; code + data. Between here and 0x1FCC we've got what looks like
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1809 ; filler:
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1810
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1811 000016C0: C0 D4 01 00 01 00 00 00 08 01 80 00 01 00 00 00 ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1812 000016D0: 01 00 00 00 34 05 80 00 00 00 00 00 00 00 00 00 ....4...........
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1813 000016E0: EC EB EA E9 E8 E7 E6 E5 E4 E3 E2 E1 E0 DF DE DD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1814 000016F0: DC DB DA D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 CF CE CD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1815 00001700: CC CB CA C9 C8 C7 C6 C5 C4 C3 C2 C1 C0 BF BE BD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1816 00001710: BC BB BA B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 AF AE AD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1817 00001720: AC AB AA A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 9F 9E 9D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1818 00001730: 9C 9B 9A 99 98 97 96 95 94 93 92 91 90 8F 8E 8D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1819 00001740: 8C 8B 8A 89 88 87 86 85 84 83 82 81 80 7F 7E 7D ..............~}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1820 00001750: 7C 7B 7A 79 78 77 76 75 74 73 72 71 70 6F 6E 6D |{zyxwvutsrqponm
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1821 00001760: 6C 6B 6A 69 68 67 66 65 64 63 62 61 60 5F 5E 5D lkjihgfedcba`_^]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1822 00001770: 5C 5B 5A 59 58 57 56 55 54 53 52 51 50 4F 4E 4D \[ZYXWVUTSRQPONM
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1823 00001780: 4C 4B 4A 49 48 47 46 45 44 43 42 41 40 3F 3E 3D LKJIHGFEDCBA@?>=
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1824 00001790: 3C 3B 3A 39 38 37 36 35 34 33 32 31 30 2F 2E 2D <;:9876543210/.-
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1825 000017A0: 2C 2B 2A 29 28 27 26 25 24 23 22 21 20 1F 1E 1D ,+*)('&%$#"! ...
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1826 000017B0: 1C 1B 1A 19 18 17 16 15 14 13 12 11 10 0F 0E 0D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1827 000017C0: 0C 0B 0A 09 08 07 06 05 04 03 02 01 00 FF FE FD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1828 000017D0: FC FB FA F9 F8 F7 F6 F5 F4 F3 F2 F1 F0 EF EE ED ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1829 000017E0: EC EB EA E9 E8 E7 E6 E5 E4 E3 E2 E1 E0 DF DE DD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1830 000017F0: DC DB DA D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 CF CE CD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1831 00001800: CC CB CA C9 C8 C7 C6 C5 C4 C3 C2 C1 C0 BF BE BD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1832 00001810: BC BB BA B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 AF AE AD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1833 00001820: AC AB AA A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 9F 9E 9D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1834 00001830: 9C 9B 9A 99 98 97 96 95 94 93 92 91 90 8F 8E 8D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1835 00001840: 8C 8B 8A 89 88 87 86 85 84 83 82 81 80 7F 7E 7D ..............~}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1836 00001850: 7C 7B 7A 79 78 77 76 75 74 73 72 71 70 6F 6E 6D |{zyxwvutsrqponm
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1837 00001860: 6C 6B 6A 69 68 67 66 65 64 63 62 61 60 5F 5E 5D lkjihgfedcba`_^]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1838 00001870: 5C 5B 5A 59 58 57 56 55 54 53 52 51 50 4F 4E 4D \[ZYXWVUTSRQPONM
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1839 00001880: 4C 4B 4A 49 48 47 46 45 44 43 42 41 40 3F 3E 3D LKJIHGFEDCBA@?>=
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1840 00001890: 3C 3B 3A 39 38 37 36 35 34 33 32 31 30 2F 2E 2D <;:9876543210/.-
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1841 000018A0: 2C 2B 2A 29 28 27 26 25 24 23 22 21 20 1F 1E 1D ,+*)('&%$#"! ...
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1842 000018B0: 1C 1B 1A 19 18 17 16 15 14 13 12 11 10 0F 0E 0D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1843 000018C0: 0C 0B 0A 09 08 07 06 05 04 03 02 01 00 FF FE FD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1844 000018D0: FC FB FA F9 F8 F7 F6 F5 F4 F3 F2 F1 F0 EF EE ED ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1845 000018E0: EC EB EA E9 E8 E7 E6 E5 E4 E3 E2 E1 E0 DF DE DD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1846 000018F0: DC DB DA D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 CF CE CD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1847 00001900: CC CB CA C9 C8 C7 C6 C5 C4 C3 C2 C1 C0 BF BE BD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1848 00001910: BC BB BA B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 AF AE AD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1849 00001920: AC AB AA A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 9F 9E 9D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1850 00001930: 9C 9B 9A 99 98 97 96 95 94 93 92 91 90 8F 8E 8D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1851 00001940: 8C 8B 8A 89 88 87 86 85 84 83 82 81 80 7F 7E 7D ..............~}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1852 00001950: 7C 7B 7A 79 78 77 76 75 74 73 72 71 70 6F 6E 6D |{zyxwvutsrqponm
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1853 00001960: 6C 6B 6A 69 68 67 66 65 64 63 62 61 60 5F 5E 5D lkjihgfedcba`_^]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1854 00001970: 5C 5B 5A 59 58 57 56 55 54 53 52 51 50 4F 4E 4D \[ZYXWVUTSRQPONM
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1855 00001980: 4C 4B 4A 49 48 47 46 45 44 43 42 41 40 3F 3E 3D LKJIHGFEDCBA@?>=
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1856 00001990: 3C 3B 3A 39 38 37 36 35 34 33 32 31 30 2F 2E 2D <;:9876543210/.-
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1857 000019A0: 2C 2B 2A 29 28 27 26 25 24 23 22 21 20 1F 1E 1D ,+*)('&%$#"! ...
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1858 000019B0: 1C 1B 1A 19 18 17 16 15 14 13 12 11 10 0F 0E 0D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1859 000019C0: 0C 0B 0A 09 08 07 06 05 04 03 02 01 00 FF FE FD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1860 000019D0: FC FB FA F9 F8 F7 F6 F5 F4 F3 F2 F1 F0 EF EE ED ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1861 000019E0: EC EB EA E9 E8 E7 E6 E5 E4 E3 E2 E1 E0 DF DE DD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1862 000019F0: DC DB DA D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 CF CE CD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1863 00001A00: CC CB CA C9 C8 C7 C6 C5 C4 C3 C2 C1 C0 BF BE BD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1864 00001A10: BC BB BA B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 AF AE AD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1865 00001A20: AC AB AA A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 9F 9E 9D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1866 00001A30: 9C 9B 9A 99 98 97 96 95 94 93 92 91 90 8F 8E 8D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1867 00001A40: 8C 8B 8A 89 88 87 86 85 84 83 82 81 80 7F 7E 7D ..............~}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1868 00001A50: 7C 7B 7A 79 78 77 76 75 74 73 72 71 70 6F 6E 6D |{zyxwvutsrqponm
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1869 00001A60: 6C 6B 6A 69 68 67 66 65 64 63 62 61 60 5F 5E 5D lkjihgfedcba`_^]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1870 00001A70: 5C 5B 5A 59 58 57 56 55 54 53 52 51 50 4F 4E 4D \[ZYXWVUTSRQPONM
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1871 00001A80: 4C 4B 4A 49 48 47 46 45 44 43 42 41 40 3F 3E 3D LKJIHGFEDCBA@?>=
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1872 00001A90: 3C 3B 3A 39 38 37 36 35 34 33 32 31 30 2F 2E 2D <;:9876543210/.-
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1873 00001AA0: 2C 2B 2A 29 28 27 26 25 24 23 22 21 20 1F 1E 1D ,+*)('&%$#"! ...
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1874 00001AB0: 1C 1B 1A 19 18 17 16 15 14 13 12 11 10 0F 0E 0D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1875 00001AC0: 0C 0B 0A 09 08 07 06 05 04 03 02 01 00 FF FE FD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1876 00001AD0: FC FB FA F9 F8 F7 F6 F5 F4 F3 F2 F1 F0 EF EE ED ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1877 00001AE0: EC EB EA E9 E8 E7 E6 E5 E4 E3 E2 E1 E0 DF DE DD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1878 00001AF0: DC DB DA D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 CF CE CD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1879 00001B00: CC CB CA C9 C8 C7 C6 C5 C4 C3 C2 C1 C0 BF BE BD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1880 00001B10: BC BB BA B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 AF AE AD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1881 00001B20: AC AB AA A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 9F 9E 9D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1882 00001B30: 9C 9B 9A 99 98 97 96 95 94 93 92 91 90 8F 8E 8D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1883 00001B40: 8C 8B 8A 89 88 87 86 85 84 83 82 81 80 7F 7E 7D ..............~}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1884 00001B50: 7C 7B 7A 79 78 77 76 75 74 73 72 71 70 6F 6E 6D |{zyxwvutsrqponm
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1885 00001B60: 6C 6B 6A 69 68 67 66 65 64 63 62 61 60 5F 5E 5D lkjihgfedcba`_^]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1886 00001B70: 5C 5B 5A 59 58 57 56 55 54 53 52 51 50 4F 4E 4D \[ZYXWVUTSRQPONM
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1887 00001B80: 4C 4B 4A 49 48 47 46 45 44 43 42 41 40 3F 3E 3D LKJIHGFEDCBA@?>=
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1888 00001B90: 3C 3B 3A 39 38 37 36 35 34 33 32 31 30 2F 2E 2D <;:9876543210/.-
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1889 00001BA0: 2C 2B 2A 29 28 27 26 25 24 23 22 21 20 1F 1E 1D ,+*)('&%$#"! ...
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1890 00001BB0: 1C 1B 1A 19 18 17 16 15 14 13 12 11 10 0F 0E 0D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1891 00001BC0: 0C 0B 0A 09 08 07 06 05 04 03 02 01 00 FF FE FD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1892 00001BD0: FC FB FA F9 F8 F7 F6 F5 F4 F3 F2 F1 F0 EF EE ED ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1893 00001BE0: EC EB EA E9 E8 E7 E6 E5 E4 E3 E2 E1 E0 DF DE DD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1894 00001BF0: DC DB DA D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 CF CE CD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1895 00001C00: CC CB CA C9 C8 C7 C6 C5 C4 C3 C2 C1 C0 BF BE BD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1896 00001C10: BC BB BA B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 AF AE AD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1897 00001C20: AC AB AA A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 9F 9E 9D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1898 00001C30: 9C 9B 9A 99 98 97 96 95 94 93 92 91 90 8F 8E 8D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1899 00001C40: 8C 8B 8A 89 88 87 86 85 84 83 82 81 80 7F 7E 7D ..............~}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1900 00001C50: 7C 7B 7A 79 78 77 76 75 74 73 72 71 70 6F 6E 6D |{zyxwvutsrqponm
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1901 00001C60: 6C 6B 6A 69 68 67 66 65 64 63 62 61 60 5F 5E 5D lkjihgfedcba`_^]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1902 00001C70: 5C 5B 5A 59 58 57 56 55 54 53 52 51 50 4F 4E 4D \[ZYXWVUTSRQPONM
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1903 00001C80: 4C 4B 4A 49 48 47 46 45 44 43 42 41 40 3F 3E 3D LKJIHGFEDCBA@?>=
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1904 00001C90: 3C 3B 3A 39 38 37 36 35 34 33 32 31 30 2F 2E 2D <;:9876543210/.-
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1905 00001CA0: 2C 2B 2A 29 28 27 26 25 24 23 22 21 20 1F 1E 1D ,+*)('&%$#"! ...
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1906 00001CB0: 1C 1B 1A 19 18 17 16 15 14 13 12 11 10 0F 0E 0D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1907 00001CC0: 0C 0B 0A 09 08 07 06 05 04 03 02 01 00 FF FE FD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1908 00001CD0: FC FB FA F9 F8 F7 F6 F5 F4 F3 F2 F1 F0 EF EE ED ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1909 00001CE0: EC EB EA E9 E8 E7 E6 E5 E4 E3 E2 E1 E0 DF DE DD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1910 00001CF0: DC DB DA D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 CF CE CD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1911 00001D00: CC CB CA C9 C8 C7 C6 C5 C4 C3 C2 C1 C0 BF BE BD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1912 00001D10: BC BB BA B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 AF AE AD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1913 00001D20: AC AB AA A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 9F 9E 9D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1914 00001D30: 9C 9B 9A 99 98 97 96 95 94 93 92 91 90 8F 8E 8D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1915 00001D40: 8C 8B 8A 89 88 87 86 85 84 83 82 81 80 7F 7E 7D ..............~}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1916 00001D50: 7C 7B 7A 79 78 77 76 75 74 73 72 71 70 6F 6E 6D |{zyxwvutsrqponm
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1917 00001D60: 6C 6B 6A 69 68 67 66 65 64 63 62 61 60 5F 5E 5D lkjihgfedcba`_^]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1918 00001D70: 5C 5B 5A 59 58 57 56 55 54 53 52 51 50 4F 4E 4D \[ZYXWVUTSRQPONM
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1919 00001D80: 4C 4B 4A 49 48 47 46 45 44 43 42 41 40 3F 3E 3D LKJIHGFEDCBA@?>=
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1920 00001D90: 3C 3B 3A 39 38 37 36 35 34 33 32 31 30 2F 2E 2D <;:9876543210/.-
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1921 00001DA0: 2C 2B 2A 29 28 27 26 25 24 23 22 21 20 1F 1E 1D ,+*)('&%$#"! ...
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1922 00001DB0: 1C 1B 1A 19 18 17 16 15 14 13 12 11 10 0F 0E 0D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1923 00001DC0: 0C 0B 0A 09 08 07 06 05 04 03 02 01 00 FF FE FD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1924 00001DD0: FC FB FA F9 F8 F7 F6 F5 F4 F3 F2 F1 F0 EF EE ED ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1925 00001DE0: EC EB EA E9 E8 E7 E6 E5 E4 E3 E2 E1 E0 DF DE DD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1926 00001DF0: DC DB DA D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 CF CE CD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1927 00001E00: CC CB CA C9 C8 C7 C6 C5 C4 C3 C2 C1 C0 BF BE BD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1928 00001E10: BC BB BA B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 AF AE AD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1929 00001E20: AC AB AA A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 9F 9E 9D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1930 00001E30: 9C 9B 9A 99 98 97 96 95 94 93 92 91 90 8F 8E 8D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1931 00001E40: 8C 8B 8A 89 88 87 86 85 84 83 82 81 80 7F 7E 7D ..............~}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1932 00001E50: 7C 7B 7A 79 78 77 76 75 74 73 72 71 70 6F 6E 6D |{zyxwvutsrqponm
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1933 00001E60: 6C 6B 6A 69 68 67 66 65 64 63 62 61 60 5F 5E 5D lkjihgfedcba`_^]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1934 00001E70: 5C 5B 5A 59 58 57 56 55 54 53 52 51 50 4F 4E 4D \[ZYXWVUTSRQPONM
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1935 00001E80: 4C 4B 4A 49 48 47 46 45 44 43 42 41 40 3F 3E 3D LKJIHGFEDCBA@?>=
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1936 00001E90: 3C 3B 3A 39 38 37 36 35 34 33 32 31 30 2F 2E 2D <;:9876543210/.-
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1937 00001EA0: 2C 2B 2A 29 28 27 26 25 24 23 22 21 20 1F 1E 1D ,+*)('&%$#"! ...
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1938 00001EB0: 1C 1B 1A 19 18 17 16 15 14 13 12 11 10 0F 0E 0D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1939 00001EC0: 0C 0B 0A 09 08 07 06 05 04 03 02 01 00 FF FE FD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1940 00001ED0: FC FB FA F9 F8 F7 F6 F5 F4 F3 F2 F1 F0 EF EE ED ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1941 00001EE0: EC EB EA E9 E8 E7 E6 E5 E4 E3 E2 E1 E0 DF DE DD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1942 00001EF0: DC DB DA D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 CF CE CD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1943 00001F00: CC CB CA C9 C8 C7 C6 C5 C4 C3 C2 C1 C0 BF BE BD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1944 00001F10: BC BB BA B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 AF AE AD ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1945 00001F20: AC AB AA A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 9F 9E 9D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1946 00001F30: 9C 9B 9A 99 98 97 96 95 94 93 92 91 90 8F 8E 8D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1947 00001F40: 8C 8B 8A 89 88 87 86 85 84 83 82 81 80 7F 7E 7D ..............~}
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1948 00001F50: 7C 7B 7A 79 78 77 76 75 74 73 72 71 70 6F 6E 6D |{zyxwvutsrqponm
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1949 00001F60: 6C 6B 6A 69 68 67 66 65 64 63 62 61 60 5F 5E 5D lkjihgfedcba`_^]
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1950 00001F70: 5C 5B 5A 59 58 57 56 55 54 53 52 51 50 4F 4E 4D \[ZYXWVUTSRQPONM
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1951 00001F80: 4C 4B 4A 49 48 47 46 45 44 43 42 41 40 3F 3E 3D LKJIHGFEDCBA@?>=
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1952 00001F90: 3C 3B 3A 39 38 37 36 35 34 33 32 31 30 2F 2E 2D <;:9876543210/.-
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1953 00001FA0: 2C 2B 2A 29 28 27 26 25 24 23 22 21 20 1F 1E 1D ,+*)('&%$#"! ...
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1954 00001FB0: 1C 1B 1A 19 18 17 16 15 14 13 12 11 10 0F 0E 0D ................
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1955 00001FC0: 0C 0B 0A 09 08 07 06 05 04 03 02 01 00 58 FF FF .............X..
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1956 00001FD0: 00 50 FF FF 00 07 00 0E 00 15 00 1C 00 2A 00 00 .P...........*..
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1957 00001FE0: 24 F0 1F E5 24 F0 1F E5 24 F0 1F E5 24 F0 1F E5 $...$...$...$...
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1958 00001FF0: 24 F0 1F E5 24 F0 1F E5 24 F0 1F E5 00 00 00 03 $...$...$.......
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1959
4
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1960 ; The filler ends at 0x1FCC. Then we've got some data words:
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1961
4
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1962 ; base addresses of the two UARTs
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1963 1fcc: ffff5800
a821df9c4457 boot ROM re: got as far as UART init
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 3
diff changeset
1964 1fd0: ffff5000
8
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1965 ; UART baud rates
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1966 1fd4: 0700 ; /7 (115200?)
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1967 1fd6: 0e00 ; /14 (57600?)
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1968 1fd8: 1500 ; /21 (38400?)
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1969 1fda: 1c00 ; /28 (28800?)
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1970 1fdc: 2a00 ; /42 (19200?)
a06573cacb6e boot ROM re: trying to understand the code that runs after '<' received
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents: 6
diff changeset
1971 1fde: 0000
1
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1972
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1973 ; These ldr-jump instructions get copied to the 7 internal RAM words
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1974 ; starting at 0x80001C. They have the effect of defining the preceding
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1975 ; 7 words (0x800000-0x800018 inclusive) as address-type vectors for the
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1976 ; exceptions, such that one can hook an exception either by replacing
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1977 ; the ldr-jump instruction in the 0x80001C-0x800034 window with a branch
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1978 ; to the desired handler, or by sticking the absolute address of that
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1979 ; desired handler into the 0x800000-0x800018 window.
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1980
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1981 1fe0: e51ff024 ldr pc, [pc, #-36] ; 0x1fc4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1982 1fe4: e51ff024 ldr pc, [pc, #-36] ; 0x1fc8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1983 1fe8: e51ff024 ldr pc, [pc, #-36] ; 0x1fcc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1984 1fec: e51ff024 ldr pc, [pc, #-36] ; 0x1fd0
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1985 1ff0: e51ff024 ldr pc, [pc, #-36] ; 0x1fd4
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1986 1ff4: e51ff024 ldr pc, [pc, #-36] ; 0x1fd8
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1987 1ff8: e51ff024 ldr pc, [pc, #-36] ; 0x1fdc
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1988 ; ???
4b5e22875181 beginning of boot ROM reverse eng
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1989 1ffc: 03000000 tsteq r0, #0 ; 0x0