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From: boesch@Shasta.STANFORD.EDU (Brian Boesch)
Newsgroups: comp.sys.ibm.pc,comp.unix.xenix
Subject: A question about 80287s vd 80387s.
Message-ID: <1927@Shasta.STANFORD.EDU>
Date: Sat, 8-Aug-87 13:27:02 EDT
Article-I.D.: Shasta.1927
Posted: Sat Aug  8 13:27:02 1987
Date-Received: Sun, 9-Aug-87 12:46:10 EDT
Reply-To: boesch@Shasta.UUCP (Brian Boesch)
Organization: Stanford University
Lines: 20
Keywords: 80287 80387 math coprocessors
Xref: mnetor comp.sys.ibm.pc:6527 comp.unix.xenix:573

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I have seen ads for several 80386 machines some include sockets for 80287 
coprocessors som 80387 coprocessors and some are switchable.

I asked a salesman at PC-limited (Their machine only supports 80287) 
and he says they get 90% of the performance of a 387 for a lot less cost.

Is the only difference between the 387 and 287 a few percent of
speed up (I assume from a wider buss interface)?

Do the 80287 and 80387 take the same commands? and is software compiled 
for one executable on the other?

Thanks in advance.

Brian

	Boesch@shasta.stanford.edu
	Boesch@shasta.uucp