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Re: 6502 illegal opcodes questions

Subject: Re: 6502 illegal opcodes questions
From: "mdj" <mdj.mdj@gmail.com>
Date: 10 May 2006 17:47:38 -0700
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tjentzsch@yahoo.de wrote:

> Just stay away from those which are marked as unreliable (e.g. see
> http://oxyron.de/html/opcodes02.html)

Which is all of them; the 65C02 and 65816 treat all unused opcodes as
NOP. If you're writing code for the Apple II it's not even worth
considering. Even older Apple II's often have 65C02's fitted nowadays,
either as a replacement or via an accelerator card.

Matt

Follow-Ups:
- Re: 6502 illegal opcodes questions
  - From: John Selck <selck_j@informatik.hgv-hamburg.de>

References:
- 6502 illegal opcodes questions
  - From: Linards Ticmanis <ticmanis@gmx.de>
- Re: 6502 illegal opcodes questions
  - From: Linards Ticmanis <ticmanis@gmx.de>
- Re: 6502 illegal opcodes questions
  - From: tjentzsch@yahoo.de

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