Posted By
AmiDog
on 2006-07-21
15:06:55
|  Re: UNdocumented instructions....
I usually visit http://unusedino.de/ec64/technical/aay/c64/ibmain.htm for information about the 6502 and illegal instructions.
The only information I can find about differences between 6502 and 7501/8501 is that there are none when it comes to (illegal) opcodes.
"All these CPUs are opcode compatible (including undocumented opcodes, except the 8502, where some differences concerning the undocumented opcodes have been reported)." http://en.wikipedia.org/wiki/MOS_Technology_6510
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