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From: rowley@cs.umn.edu (Henry A. Rowley)
Newsgroups: comp.sys.ibm.pc,comp.sys.ibm.pc.programmer,comp.binaries.ibm.pc.d
Subject: Re: AMD 80C287 Math Coprocessors
Message-ID: <1990Jun29.191038.14046@cs.umn.edu>
Date: 29 Jun 90 19:10:38 GMT
References: <1990Jun27.202426.9745@mozart.amd.com> <1990Jun29.145300.6527@vlsi.waterloo.edu>
Organization: University of Minnesota, Minneapolis - CSCI Dept.
Lines: 19

In article <1990Jun29.145300.6527@vlsi.waterloo.edu> atschnei@vlsi.waterloo.edu (Todd Schneider) writes:
>Apparently they may (the person I spoke to was VERY unsure of this) offer
>12MHz version in a few weeks if this offer goes well.
>Does any one (perhaps someone from AMD) know how reliably the 10MHz 
>version would operate at 12MHz? I'd really like to go for this, but

I just called AMD, and they said that the math coprocessor divides down the 
clock speed to 2/3 its original value.  So if you put it in a 12MHz machine,
it will be running at 8MHz.  I don't know if this statement is accurate.
Does Intel's 80287, or the one made by ITT, do the same thing?


Henry A. Rowley          Internet: rowley@cs.umn.edu -or- rowley@ux.acs.umn.edu
THE CONTENT OF THE PROPOSITIONS - _The Shockwave Rider_ -----------------------
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us can know.