WTD: AMD or Intel 80387 Math Coprocessor IC

From: Brian Chase <vaxzilla_at_jarai.org>
Date: Wed Feb 26 17:36:01 2003

On Wed, 26 Feb 2003, Joe wrote:
> At 10:43 PM 2/26/03 -0000, you wrote:

> > 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 MHz? I didn't think they made them over 25 Mhz. I have a couple
> around here but I'll have to dig them out. However I'm pretty sure
> that they're 20 and 25 Mhz.

Back in the day, Intel made 386DX chips that ran up to 33MHz. AMD came
out with a clone chip in the 1990-1991 time frame that was a 386DX that
ran at 40MHz. I ran a 33MHz rated ITT 387 clone mathco in mine without
problems. IIRC, the ITT mathco didn't perform quite as well as a real
Intel one, but it was better than not having anything.

I know Intel still has a rather large 80386 embedded processor market,
so I'd not be surprised if they're making much faster versions of it now.
... But apparently they aren't:


Received on Wed Feb 26 2003 - 17:36:01 GMT

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