Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!cditi!josh
From: josh@cditi.UUCP (Josh Muskovitz)
Newsgroups: comp.sys.cbm
Subject: Re: Undocumented 6502/6510/8502 instructions? (LONG)
Message-ID: <765@cditi.UUCP>
Date: 12 Dec 90 16:25:33 GMT
References: <1990Nov13.043708.23063@DMI.USherb.CA> <59424@microsoft.UUCP>
Distribution: na,comp
Organization: CDI Technologies Inc., Grand Rapids, MI
Lines: 51

In article <59424@microsoft.UUCP>, kentsu@microsoft.UUCP (Kent SULLIVAN) writes:
> My friend Noel Nyman has done quite a bit with undocumented opcodes.  The
> following is from him.

[lots of good text deleted]

>...  It occurred to me that, since the 6502 was used in the 
>Apple line before Commodore made computers, someone in that community may have 
>worked with undocd codes also.

[more deleted]

> Ray Quirling's letter to TRANSACTOR starts out "People who investigate 
> undocumented opcodes deserve all the headaches they get!"  After many hours 
> chasing after what appears to be useless (though interesting) 65XX trivia, I 
> tend to agree.

[more deleted]

> If, after all that, you still decide to pursue this subject, good luck.  It 
> will be frustrating and fun.  If you find anything interesting, let me know 
> and we'll compare notes.

> Noel Nyman   (11/90)
> Geoduck Developmental Systems
>      (in association with Dr. Evil Labs)
> PO Box 58587
> Seattle WA  98138
> USA


I may be wrong, but the way I remember it, Commodore put out the first PET2001
well before Apple released the Apple ][.  I don't count the Apple I, since it
never really made it into production.

The rest of what you said sounds right, though.  I remember experimenting with
undocumented ops on my PET eons ago.  Also, Raeto West's book, Programming the
PET/CBM was (at the time of first publishing) the VERY VERY VERY best book of
info on this great machine.  All of the information may not be original, but
for the most part, it's all in there.

I still regret giving up my PET and all of the info I collected over the years.

If anyone has a working machine (hopefully with a floppy drive, at least) and
is sick of it, perhaps we can work something out.  I still have my war-torn
original poster proclaiming "PET -- Unleash One Today".  *sniff*

Josh Muskovitz
Computer Design, Inc.  (but only until the end of the month)
Grand Rapids, MI
josh@uunet!cditi