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From: 6600tlee@ucsbuxa.ucsb.edu (Tennyson Lee)
Newsgroups: sci.electronics
Subject: Re: math co-processor??
Message-ID: <5673@hub.ucsb.edu>
Date: 5 Jun 90 18:28:55 GMT
References: <3002@crash.cts.com>
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Organization: University of California -- Santa Barbara
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In-reply-to: sazerb@pnet01.cts.com's message of 5 Jun 90 06:36:01 GMT

In article <3002@crash.cts.com> sazerb@pnet01.cts.com (S Zerbe) writes:

   I was digging around inside my xt-clone tonight and was trying to find the
   locations of the various chips.  I Know that the microprocessor is the 8088-2
   but there was a chip next to it with the following on it:
	       NEC 8643w5 V20
	       D70108c-8
	       '84 NEC
       Now from this I know that the chip was probably made in the 43rd week of
   1986 and that NEC is the manufacturere.  But I was wondering is this a Math
   Co-Processor??  I have heard of the 8087's but this one is not one that I have
   heard of.

   Any info on this chip would be a great help.
   Thanks
   Steven Zerbe   KA4YND

As far as I know, the chip you mentioned is an NEC V20 chip.  The V20
is a 8088 compatible processor that NEC claims to be about 10-15%
faster.  If you have one of these in your machine, I wonder why you
still have a 8088 in there.  Don't think it's a math chip since NEC
doesn't make any 8088 compaticle math processors.