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Re: apple][ or ][+ software not working on 65C02

Subject: Re: apple][ or ][+ software not working on 65C02
From: "Jorge" <R2DThree@gmail.com>
Date: 10 Apr 2007 12:59:57 -0700
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On Apr 10, 9:36 pm, "vladitx" <vlad...@nucleusys.com> wrote:
>
> 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.
>

Not exactly based on an undocumented instruction, but IIRC the Apple
II Logo failed to boot on a 65c02 because it did a tricky jump
indirect with the operand purposedly sitting across page
boundaries... ?
(these behave badly on 6502s but not on 65c02s)

Jorge.

References:
- apple][ or ][+ software not working on 65C02
  - From: "vladitx" <vladitx@nucleusys.com>

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