Path: utzoo!mnetor!uunet!husc6!uwvax!oddjob!gargoyle!ihnp4!cbosgd!gwspc!cbcsta!n8emr!uncle!jbm
From: jbm@uncle.UUCP (John B. Milton)
Newsgroups: comp.sys.att
Subject: Re: opening a 3B1, 68881 FPU
Message-ID: <201@uncle.UUCP>
Date: 11 Dec 87 04:47:20 GMT
References: <1836@cup.portal.com>
Reply-To: jbm@uncle.UUCP (John B. Milton)
Organization: Just me and my computer, Columbus Ohio
Lines: 31

In article <1836@cup.portal.com> thad@cup.portal.com writes:
>Anyone know the "secret" to opening up a 3B1?

There are three little rachet hooks, just pry the case out from the front
a little at each of the three liitle hooks.

>Also, the parts and documentation lists that accompany the system
>strongly suggest a 68881 can be plugged into the system.

I talked with the UNIXpc developement group at AT&T. They said the board
WAS actually made. However, the 68881 was designed to be a co-processor
for the 68020, not the 68010 in the UNIXpc. As a result it had to be used
as a 16 bit I/O device with an emulated co-processor interface. This hurt
performance so much they decided NOT to produce the board. My personal
thinking is that someone goofed somewhere.

>     405176785        Expansion Unit

You can put anything except memory boards in this. Plug in memory INSIDE
the UNIXpc already gets one extra wait state over the mother board.

>Anyone know if there's a SCSI adapter card for the 3B1 too?

You may have heard the rumor that everyone else has. I hope it's true as
multiple disk expansion is doomed otherwise.

John

-- 
John Bly Milton IV, jbm@uncle.UUCP, {ihnp4|cbosgd}!n8emr!uncle!jbm
home: (614) 294-4823, work: (614) 424-7677, FLAME via email :)