Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!seismo!mimsy!cvl!umd5!brl-adm!adm!tanj@ucscc.UCSC.EDU
From: tanj@ucscc.UCSC.EDU (Michael Berman)
Newsgroups: comp.unix.questions
Subject: Re: Unix/Xenix on the 386
Message-ID: <7223@brl-adm.ARPA>
Date: Sun, 3-May-87 17:09:06 EDT
Article-I.D.: brl-adm.7223
Posted: Sun May  3 17:09:06 1987
Date-Received: Sun, 3-May-87 22:04:34 EDT
Sender: news@brl-adm.ARPA
Lines: 22

> From: Michael Jensen <jensen@gpu.utcs.toronto.EDU>
> Subject: Unix/Xenix on the 386
> Date: 30 Apr 87 18:45:07 GMT
> To:       info-unix@brl-sem.arpa
> 
> Perhaps I have missed the discussion but I'm hearing a number of rumours about
> bugs in the Intel 80386 when running under Unix/Xenix. Apparently the chips
> can be returned for new ones even. Has anyone ever run SCO Xenix on the 386?
> -- Mike Jensen
> -----------------------------

Certain Intel 386 chips come up with the wrong answer when doing a 32 bit
add.  There is a fairly simple program available from Intel which tests
for this bug.  The current release of SCO Xenix is not effected by this bug
because it is running 286 code--not 386.  The new 386 OS release will/has
this test program incorporated in it as part of the install procedure.
Since the addition bug will adversely effect the OS, if the test program
detects an error in the CPU the install will fail and notify the user
that they should replace their CPU.


				Michael Berman