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apple][ or ][+ software not working on 65C02
- Subject: apple][ or ][+ software not working on 65C02
- From: "vladitx" <vladitx@nucleusys.com>
- Date: 10 Apr 2007 12:36:48 -0700
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Hello,
Knowing that there are quite knowledgable and experienced fellows (and
some with especially notable memory), I'd like to gather any
statistics on the following:
Are there any Apple ][ or ][+ titles (games or whatever) which use
some of the undocumented opcodes, and which don't work on the 65C02?
Multi-cycle NOP instructions and alikes that just take few cycles (and
confuse people and emulators) don't count.
The questions is, are the strange ALU operations of 6502
"undocumented" opcodes really needed for Apple2 emulation? C64 is a
different story, but I have the feeling that Apple2 software
developers avoided this on purpose.