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Re: 6502 illegal opcodes questions
- Subject: Re: 6502 illegal opcodes questions
- From: tjentzsch@yahoo.de
- Date: 25 Apr 2006 03:38:40 -0700
- Complaints-to: groups-abuse@google.com
- Injection-info: t31g2000cwb.googlegroups.com; posting-host=195.233.250.6; posting-account=siIWPAwAAADV34WUro6vSld-UdhllhVJ
- Newsgroups: comp.sys.cbm, comp.sys.apple2, rec.games.video.classic
- Organization: http://groups.google.com
- References: <444be7a0$0$11080$9b4e6d93@newsread4.arcor-online.net> <444df05e$0$4499$9b4e6d93@newsread2.arcor-online.net>
- User-agent: G2/0.2
- Xref: g2news2.google.com comp.sys.cbm:14630 comp.sys.apple2:6724 rec.games.video.classic:4452
Actually there are some nice and reliable(!) opcodes which save space
and CPU time. Especially LAX, DCP, ISC and the various NOPs are used by
many homebrew programmers for the Atari 2600 console.
Just stay away from those which are marked as unreliable (e.g. see
http://oxyron.de/html/opcodes02.html)