Hallo William, > ...... > A65A LDA $1860 > A65D BRK > > The interrupt vector ist FE67 > > FE67 JMP($02A9) > > At this point, the RAM has not even been cleared, let alone filled with > values. The drive should crash at this point, but it doesn't. > > A65A is the beginning of the chip initialization routine in the 1571. It > jumps to several locations and then jumps back and finishes the > initialization. > > The routine above makes no sense to me. > > Does anyone have an explanation? Yes, I do. IMHO the above disassembly is wrong. It should be: A65A LDA #$02 A65C STA $1800 A65F LDA #$20 A661 STA $1801 A664 JMP $FF18 ; back to RESET-routine Groetjes, Ruud > > > - > This message was sent through the cbm-hackers mailing list. > To unsubscribe: echo unsubscribe | mail cbm-hackers-request@dot.tcm.hut.fi. > - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail cbm-hackers-request@dot.tcm.hut.fi.
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