This is the disassembly of the drive ROM reset vector: The reset vector is EAA0 EAA0 SEI EAA1 CLD EAA2 LDX #$66 EAA4 JMP $FF10 FF10 STX $1803 FF13 LDA #$02 FF15 JMP $A65A 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?? - 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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