Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!utcs!mnetor!seismo!ll-xn!cit-vax!mangler
From: mangler@cit-vax.UUCP
Newsgroups: net.unix,net.unix-wizards
Subject: Re: Console hangs on Vax 780 4.2BSD
Message-ID: <808@cit-vax.Caltech.Edu>
Date: Wed, 16-Jul-86 03:37:55 EDT
Article-I.D.: cit-vax.808
Posted: Wed Jul 16 03:37:55 1986
Date-Received: Wed, 16-Jul-86 09:04:31 EDT
References: <2879@sdcrdcf.UUCP>
Organization: California Institute of Technology
Lines: 15
Xref: utcs net.unix:8605 net.unix-wizards:18184
Summary: LSI-11's can BREAK

In article <2879@sdcrdcf.UUCP>, davem@sdcrdcf.UUCP (David Melman) writes:
> Sometimes this 'hung-console' problem results in a crash with the following
> message on the console:
>
> ?UNEXPECTED TRAP

This happened to our 780 a while back.	The console LSI-11 would
take a trap, and need to be rebooted.  Of course rebooting the LSI-11
also reboots the KA780 that it controls.

The problem is that your LSI-11 is BROKEN.  I think in our case DEC
replaced the LSI-11's cpu board, but I'm not sure.  Call your friendly
field circus rep.

Don Speck	speck@vlsi.caltech.edu	seismo!cit-vax!speck