Stefan Drissen wrote: > Just curious, how do you detect the difference between code and data?
I was just assuming that the ROM wouldn't be self-modifying, so following the possible execution paths from boot would catch almost everything. That doesn't cover look-up tables of jump addresses, though spotting code patterns of PUSH rr followed by RET and maybe JP (HL) would perhaps spot possible problem areas. That might be enough to recognise exception blocks in popular titles, much like my SID player has exceptions for some SID register writes. I've not actually examined any ROMs to know how likely it is - Dr Beep can probably give you a real answer! Si
