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Path: utzoo!watmath!clyde!burl!ulysses!bellcore!decvax!hplabs!hp-pcd!john
From: john@hp-pcd.UUCP (john)
Newsgroups: net.micro.pc
Subject: Re: Re: MS Mouse, V-20 w/8087, Edge Ques
Message-ID: <13600006@hpcvla.UUCP>
Date: Fri, 18-Apr-86 21:42:00 EST
Article-I.D.: hpcvla.13600006
Posted: Fri Apr 18 21:42:00 1986
Date-Received: Mon, 21-Apr-86 04:26:50 EST
References: <440@mips.UUCP>
Organization: Hewlett-Packard - Corvallis, OR
Lines: 20
Nf-ID: #R:mips:-44000:hpcvla:13600006:000:635
Nf-From: hpcvla!john    Apr 18 18:42:00 1986

<<<<<
<
<
> Has anyone with a V-20 processor used an 8087 with it? Do they work  
> together without contention? What kind of speed advantage did you 
> find?  I have become addicted to an 8 Mhz 8088/8087 but like the
> idea of CP/M native code with the new patch programs.  How well do
> THEY work?
<

One potential problem when running a V20 in 8080 mode is that the 8087
is still watching the instruction stream to see if any floating point
instructions are being executed. I haven't checked the opcodes but I think
you could probably find some 8080 opcodes that will send an 8087 out to 
lunch. 



John Eaton
!hplabs!hp-pcd!john