Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.1 6/24/83; site moncol.UUCP
Path: utzoo!watmath!clyde!cbosgd!ihnp4!mhuxn!mhuxr!mhuxt!houxm!vax135!petsd!moncol!john
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
Phone:		(201) 222-6600 x366
UUCP:		...!vax135!petsd!moncol!john	...!princeton!moncol!john
						   ...!pesnta!moncol!john
Disclaimer:
	Monmouth College is a mecca for diverse opinions. It is, therefore,
	highly unlikely that the above opinions are those of anyone but me.

	"Are we gonna be starcrossed lovers or just good friends?"


Brought to you by Super Global Mega Corp .com