AMD or Intel 80387 Math Coprocessor IC

From: TeoZ <teoz_at_neo.rr.com>
Date: Wed Feb 26 20:41:00 2003

There are more then 1 variety of 40Mhz math coprocessors. Back when my main
computer was a 386 in the early 90's I purchased the Cyrix version for my
AMD 386/40DX and it crunched nubers very well (funny how cyrix went from the
fastest FPU unit in the 386/486 days to the WORST during the pentium period
when it mattered).

I currently have a 386dx/40 and a math coprosessor but I dont think its a
cyrix (using it for a dos game rig) Did IIT make them also?


----- Original Message -----
From: "Robert F. Schaefer" <rschaefe_at_gcfn.org>
To: <cctalk_at_classiccmp.org>
Sent: Wednesday, February 26, 2003 7:48 PM
Subject: Re: AMD or Intel 80387 Math Coprocessor IC


> ----- Original Message -----
> From: "Philip Pemberton" <philpem_at_dsl.pipex.com>
> To: <cctalk_at_classiccmp.org>
> Sent: Wednesday, February 26, 2003 5:43 PM
> Subject: WTD: AMD or Intel 80387 Math Coprocessor IC
>
>
> > Hi all,
> > I'm trying to track down a 387 math coprocessor IC for an old
> 386-based
> > Linux box that's going to be doing a bit of numbercrunching for me. Has
> > anyone here got an AMD or Intel (AMD preferred) 387 coprocessor rated at
> > 40MHz (-40 part number suffix) that would work correctly with an AMD
> > Am386DX-40? No, before you ask, the 386DX does *not* have a built in
> > mathco - the 486DX was (IIRC) the first DX-series chip with a built-in
> > coprocessor.
>
> They come up on epay all the time, pick yer flavor. I just got a 40MHz
> Cyrix Fasmath chip for $2 (includes $1 shipping) a week ago. Supposedly
> clock for clock it's the fastest of the '387 FPUs, but IDK. Popped right
in
> to to my P70.
>
> I'm still looking for a set of eight 2MB 72 pin IBM SIMMs with presence
> detect, and a Cyrix 486Drx2, which is a 486 with a '386 pinout, if anyone
> has a spare.
>
> >
> > Thanks.
> > --
> > Phil.
>
> Bob
Received on Wed Feb 26 2003 - 20:41:00 GMT