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Date:      Thu, 23 Nov 1995 01:35:34 +0000 ()
From:      Michael Smith <msmith@atrad.adelaide.edu.au>
To:        pol@leissner.se (Peter Olsson)
Cc:        msmith@atrad.adelaide.edu.au, questions@freebsd.org
Subject:   Re: FreeBSD-boot crashes ICL-machines, anyone else had this?
Message-ID:  <199511230135.BAA27349@genesis.atrad.adelaide.edu.au>
In-Reply-To:  <9511221927.aa24851@lda.leissner.se> from "Peter Olsson" at Nov 22, 95 07:27:12 pm

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Peter Olsson stands accused of saying:
> >Do the crashing machines have S3-based video hardware?
> 
> The P100 has mac64, I don't know about the P75. Doesn't seem like this is
> the problem (?)

The problem is that a number of video cards (many S3-based, for starters)
occupy the same port addresses as the fourth serial port.  In order to 
successfully probe the second serial port in a four port system, it is
necessary to write to the fourth port, which can upset some video adapters,
possibly causing the system to crash.

> A technician at Swedish ICL has exactly the same symptoms. He thougt it was
> due to the P75 having only one serial port, so he tried setting in another,
> but it didn't help. Then they wouldn't investigate any further, they instead
> recommended a change to their supported unix-systems :(

Morons.  If it was a commercial system, they'd be sitting still twiddling
their thumbs waiting for a patch.  There are plenty of people who'd be
more than happy to help them out fixing either their hardware or FreeBSD 8(

> Peter Olsson                   Email: pol@leissner.se

-- 
]] Mike Smith, Software Engineer        msmith@atrad.adelaide.edu.au    [[
]] Genesis Software                     genesis@atrad.adelaide.edu.au   [[
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