28 Feb
1998
28 Feb
'98
10:11 a.m.
mmm, a //gs... yes please here also. the thought of a
16-bit 6502 to
play with... :> (yep, even though we have a special affection for the
much maligned 286.)
Having spent 2 years programming the 65816, believe me you DON'T want to
play with a 16 bit 6502!!!! The memories, the memories.... There was a
processor dog if ever I saw one. Interpretation of opcodes was dependant on
the mode the processor was set to, and so if you branched to a section of
code when you were in the wrong mode, results were... screwy.
All sorts of wierd and wonderful things when you switched modes; for
example switching from 16 bit accumulator to 8 bit cleared the high byte,
but switching the index registers the same.... didn't.
It was a very painful time in my life :)
A