FreeCalypso > hg > freecalypso-reveng
view bootrom.notes @ 4:a821df9c4457
boot ROM re: got as far as UART init
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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date | Tue, 16 Apr 2013 05:36:59 +0000 |
parents | e3f8fe6a848e |
children | a445735685ba |
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RAM layout: 800000 7 words: soft-vector pointers: by default the following 7 words at 80001C are filled with ldr-jump instructions, which read from these 7 words and load them into PC 80001C 7 words: hard vectors: the physical vector locations in the ROM contain branch instructions to these 7 RAM addresses 800104: word initialized to 0x0001D4C0 800108: byte initialized to 0x01 800534: byte initialized to 0x00 8005C0: appears to be the intended low address (bottom) of the stack 80074C: top of the stack (initial value loaded into SP)