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Can we trust BIOS routine registers usage?

by aoineko on 18-01-2023, 21:47
Score: 165.32 %, Type: Forum topic , Comments: 6 comments
Hi everyone, The documentations that describe the BIOS functions often list the registers that each function modifies (and that the calling code must save if it doesn't want to lose the values). C compilers like SDCC assume that all assembler ...

The Memory

by gdx on 18-01-2023, 07:36
Score: 138.72 %, Type: wiki , Comments: 0 comments
in the Main-ROM at address 0000h (slot 0 or 0-0) and scans the primary and secondary slots as shown in the figure below. In the example (0-0) the first 0 is the primary slot, the second 0 is the secundary slot) ... of page 0 and 1 at F341h and F342h, then scans the slots on 0000h~3FFFh and 4000h~7FFFh pages to find ...
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