From: "Jim Kearney" <jim_at_jkearney.com>
To: <cctalk_at_classiccmp.org>
Subject: Re: Whats wrong with chip collecting? (SOL-20)
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Date sent: Tue, 19 Nov 2002 08:01:25 -0500
> >From: "Hans Franke" <Hans.Franke_at_mch20.sbs.de>
> > So, now I happen to own a KIM which I belive is the real #1
> > board. The CPU is a MOS MCS 6502 dated 4675, white ceramic.
> > As such it is from the very first batch of 6502s, of course
> > includeing the infamous ROR bug (no, Intel wasn't the first
> > to sell buggy CPUs :). It ends not just there, but it might
> > even bee THE first 6502 - or at least the first to be used
> > in a manufactured computer.
>
> That's a pretty nice little item. I'm curious about this ROR bug - I don't
> remember talk of it from the time. Do you know when it was fixed? I happen
> to have an OSI 300 (a very primitive 6502 trainer) with a similar CPU
> datecoded 4775 on it, I would guess it's buggy too.
Maybe check Peter Jennings site
http://www.benlo.com/
He has some notes about the missing ROR on his Reference sheet page
http://www.benlo.com/6502.html
His writeing about the development of the world famoud Microchess
for the KIM is a true tale of the early days:
http://www.benlo.com/microchess2.html
Gruss
H.
--
VCF Europa 4.0 am 03./04. Mai 2003 in Muenchen
http://www.vcfe.org/
Received on Tue Nov 19 2002 - 07:36:01 GMT