FreeCalypso > hg > freecalypso-reveng
comparison bootrom.notes @ 3:e3f8fe6a848e
boot ROM re: started on main() and the 0xe2c routine
| author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
|---|---|
| date | Mon, 15 Apr 2013 16:18:53 +0000 |
| parents | |
| children | a445735685ba |
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| 2:979d97fe75eb | 3:e3f8fe6a848e |
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| 1 RAM layout: | |
| 2 | |
| 3 800000 7 words: | |
| 4 soft-vector pointers: by default the following 7 words at | |
| 5 80001C are filled with ldr-jump instructions, which read | |
| 6 from these 7 words and load them into PC | |
| 7 80001C 7 words: | |
| 8 hard vectors: the physical vector locations in the ROM | |
| 9 contain branch instructions to these 7 RAM addresses | |
| 10 | |
| 11 800104: word initialized to 0x0001D4C0 | |
| 12 800108: byte initialized to 0x01 | |
| 13 | |
| 14 800534: byte initialized to 0x00 | |
| 15 | |
| 16 8005C0: appears to be the intended low address (bottom) of the stack | |
| 17 80074C: top of the stack (initial value loaded into SP) |