I was figuring, if one is going to go down the illegal opcode path... then
why not go the whole hog. A search of the 'net has failed to dredge up the
info I need, and I'm hoping somebody on the list can help out. I recall
many years ago two illegal 6502 instructions I'm hoping are available for
the 2600... those were XXY and one I can't remember the mnemonic of. XXY
simply exchanged X and Y registers... handy! The other swapped nibbles on
the accumulator... VERY handy.
That is, given a byte $AB, after that instruction you would have $BA.
Hoping somebody can help (or be bothered trying to find the instructions!!)
Cheers
A
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