Re: Math coprocessor for PC Transporter?

["Jason Whorton" <jason at microxl.com>]

The "-2" on the end of an 8087 is a code for a certain speed designation.  I
have forgotten what they are.

Thanks,
Jason Whorton
jason at microxl.com


"Dosius" <steve@dosius.zzn.com> wrote in message
9307085f.0210280622.642183e@posting.google.com">news:9307085f.0210280622.642183e@posting.google.com...
> Yves McDonald <""yves.mcdonald\"@NO SPAM sympatico.ca> wrote in message
news:<h_1v9.1857$h_4.225519@news20.bellglobal.com>...
> > I don't know much about the 80287-10 but I know it's designed for the
> > 80286 but according to AE doc, the empty socket was for a 8087-2 math
> > co-processor.  The Transporter itself is powered by a V-30 (8086
> > compatible) at 7.14 MHz: twice as fast as the original IBM PC :)  The
> > 8087 coprocessor was a popular upgrade for CAD users.
> >
> > Herbert Fung wrote:
> >
> > > Since I don't know much about older PC hardware I wanted to ask if
anyone
> > > knew what chips are compatible for the math co-processor socket on a
PC. I
> > > understand that an 8087 is intended, but I'm wondering what else would
work.
> > >
> > > I manged to find a D80287-10 and it's pin compatible, but I wanted to
see if
> > > anyone knew if it was safe to use.
> > >
> > >
> > >
>
> Not quite twice (4.77*2=9.54) :)  btw, V-30 could emulate an 8080 and
> run CP/M, theoretically...