Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!att!cbnewsd!jps
From: jps@cbnewsd.ATT.COM (j.p.schoonover)
Newsgroups: comp.arch
Subject: Re: AT&T 3B20D
Summary: some answers
Keywords: 3B20D
Message-ID: <226@cbnewsd.ATT.COM>
Date: 16 Jun 89 14:48:38 GMT
References: <486@ntvax.UUCP>
Distribution: na
Organization: AT&T Bell Laboratories
Lines: 20

In article <486@ntvax.UUCP>, yang1@ntvax.UUCP (cqyang class) writes:
> 
> 
>    I understood that the 3B20D also could be used as a general purpose 
> minicomputer, and there are not many machines I know of (execpt Tandems)
> that would allow board replacements while the machine is running. I was
> also interested if anyone had made use of the writtable instruction set.

I don't know that AT&T has tried to sell the 3B20D as a general purpose
mini, but I wouldn't recommend using it that way.  It's too old a machine.

A project using the 3B20D called TSPS did use the ability to write
micro-code for this machine to emulate the 1A processor.


					J. P. Schoonover
					(312) 979-7907
					iwtds!jps

(A 3B20D field support kind of guy)