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From: john@moncol.UUCP (John Ruschmeyer)
Newsgroups: net.micro,net.micro.pc
Subject: A NEC 8087 for the V20?
Message-ID: <505@moncol.UUCP>
Date: Tue, 17-Sep-85 14:04:24 EDT
Article-I.D.: moncol.505
Posted: Tue Sep 17 14:04:24 1985
Date-Received: Wed, 18-Sep-85 03:47:35 EDT
Organization: Monmouth College, West Long Branch, NJ 07764
Lines: 29
Xref: watmath net.micro:11997 net.micro.pc:5318

I was reading through the technical data for the V20 when I noticed the
following under the section on the Queue Status signals:

	The CPU uses these signals to allow external
	devices, such as the floating-point arithmetic
	processor chip, (uPD72091) to monitor the status
	of the internal CPU instruction queue.

I assume the uPD72091 is to a V20/V30 what an 8087 is to an 8088/8086, but
I had never heard it mentioned in any discussion of the V20.

Is this chip as compatable with an 8087 as the V20 is with the 8088 (i.e. a
direct replacement)? If so, does it offer any advantages over the Intel
chip? If both of the above are true, does anybody know of a supplier/cost?

Thanks in advance...


-- 
Name:		John Ruschmeyer
US Mail:	Monmouth College, W. Long Branch, NJ 07764
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Disclaimer:
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