Date: Sun, 23 Jun 1996 18:44:55 -0700 (PDT) From: "Rodney W. Grimes" <rgrimes@GndRsh.aac.dev.com> To: jhs@FreeBSD.org Cc: michaelv@HeadCandy.com, stesin@elvisti.kiev.ua, hardware@FreeBSD.org, gj@FreeBSD.org Subject: Re: Cyrix and AMD chips Message-ID: <199606240144.SAA07440@GndRsh.aac.dev.com> In-Reply-To: <199606231427.QAA14819@vector.jhs.no_domain> from "Julian H. Stacey" at "Jun 23, 96 04:27:21 pm"
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> Hi, Reference:
> > From: "Michael L. VanLoon -- HeadCandy.com" <michaelv@HeadCandy.com>
> > Subject: Re: Cyrix and AMD chips
>
> > >From jhs@freebsd.org
> > ># Only certainty is: AMD chips are Not always plug compatible.
> >
> > > I 100% agree -- not always compatible; not to mention the fact
> > > that early Enhanced Am486 chips were ummm... say, crap,
> > > and non-enhanced ones generally sucked, too -- compared to Intel.
> >
> > From "Andrew V. Stesin" <stesin@elvisti.kiev.ua>
> > I *strongly* disagree.
>
> Not sure if you disagree with Andrew's bit or my bit, if mine:
> A pity you aren't in Munich, I think one of those chips is still in Munich,
> I still have those same 2 boards (I bough Gary J's off him a while ago),
> I never bet money, but I'd have bet you an indian meal +drinks,
> that I could reproduce the failure :-)
>
>
> > What vintage chips are you speaking of?
>
> Can't remember, Ask Rod Grimes or Gary Jennejohn.
Date codes from these chips are:
D/C: E6 9431GPF
D/C: E6 9429GPD
So they look like mid 1994 vintage A80486DX2-66 chips. These chips where
fully tested (ran FreeBSD make worlds) in motherboard before they where
shipped, so it is/was a MB/chip compatibility problem, and not a chip
flaw with respect to the FPU problem. I have only heard of one other
case of this, so it is very rare and only seems to inflict boards that
where designed before the Intel DX2/66 chip.
--
Rod Grimes rgrimes@gndrsh.aac.dev.com
Accurate Automation Company Reliable computers for FreeBSD
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