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by rep_lodsb
1250 days ago
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Wow, that series looks fascinating! Only watched the first video yet, after initializing itself the CPU actually runs this code (because D8-D15 is wired to zero): addr opcode
FFFFF0 90 NOP
FFFFF1 00 90 00 90 ADD [BX+SI+9000],DL
FFFFF5 00 90 00 90 ADD [BX+SI+9000],DL
FFFFF9 00 90 00 90 ADD [BX+SI+9000],DL
FFFFFD 00 90 00 -- !! general protection fault
You can see it read and write the same address three times, then fetch the interrupt 0Dh vector and push flags+CS+IP to the stack :) |
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