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Path: utzoo!utgpu!news-server.csri.toronto.edu!clyde.concordia.ca!uunet!crdgw1!sixhub!davidsen
From: davidsen@sixhub.UUCP (Wm E. Davidsen Jr)
Newsgroups: comp.sys.ibm.pc,comp.sys.ibm.pc.programmer,comp.binaries.ibm.pc.d
Subject: Re: AMD 80C287 Math Coprocessors
Message-ID: <1221@sixhub.UUCP>
Date: 7 Jul 90 00:33:55 GMT
References: <1990Jun27.202426.9745@mozart.amd.com> <1990Jun29.145300.6527@vlsi.waterloo.edu> <1990Jun29.191038.14046@cs.umn.edu>
Reply-To: davidsen@sixhub.UUCP (bill davidsen)
Followup-To: comp.sys.ibm.pc
Organization: *IX Public Access UNIX, Schenectady NY
Lines: 15

In article <1990Jun29.191038.14046@cs.umn.edu> rowley@cs.umn.edu (Henry A. Rowley) writes:

| 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?

  You may have misunderstood. Usually 286 AT clone motherboards run
the clock by 2/3 of the CPU speed, like the original AT. Hopefully the
chip will actually run as fast as a 10MHz Intel part.
-- 
bill davidsen - davidsen@sixhub.uucp (uunet!crdgw1!sixhub!davidsen)
    sysop *IX BBS and Public Access UNIX
    moderator of comp.binaries.ibm.pc and 80386 mailing list
"Stupidity, like virtue, is its own reward" -me