Xref: utzoo unix-pc.general:1571 comp.sys.att:4611
Path: utzoo!utgpu!water!watmath!clyde!att!rutgers!labrea!decwrl!sun!pitstop!sundc!seismo!uunet!portal!cup.portal.com!thad
From: thad@cup.portal.com (Thad P Floryan)
Newsgroups: unix-pc.general,comp.sys.att
Subject: Re: Could a 68881 Math co-processor go fast?; HwNote07
Message-ID: <10516@cup.portal.com>
Date: 26 Oct 88 09:18:34 GMT
References: <372@uncle.UUCP> <5087@cbmvax.UUCP>
Organization: The Portal System (TM)
Lines: 16

Mike Ditto suggested trying one of the CSA 68020/68881 boards in the UNIXpc.

I just happen to have one here (when I replaced the 020/881 in one of my
Amigas with an 030), so I'll plug it into one of the "extra" UNIXpcs here
and see what happens!

Only see two problems:

1) the CSA daughterboard is tall, so will have to run with the UNIXpc's
   hood open, and

2a) HOW can I issue the MOVEC to enable the 020's cache? (since it's a
    privileged instruction)
2b) HOW to handle the stack frame differences upon interrupts?

Thad Floryan [thad@cup.portal.com (OR) ...!sun!portal!cup.portal.com!thad]