AMD or Intel 80387 Math Coprocessor IC

From: Robert F. Schaefer <>
Date: Wed Feb 26 18:51:00 2003

----- Original Message -----
From: "Philip Pemberton" <>
To: <>
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
> 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.

Received on Wed Feb 26 2003 - 18:51:00 GMT

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