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Date: Fri, 29 Mar 1996 13:46:57 +1100
From: Mark Hannon <epamha@epa.ericsson.se>
Organization: Ericsson Australia
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Cc: Mark Hannon <mark@seeware.DIALix.oz.au>
Subject: DOS hang causes FreeBSD boot 
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Hi all,

You may remember a couple of earlier messages I sent on this
list two weeks ago re: strange hangs, reboots, SIGBUS etc after
upgrading to a PCI, AMD4/120 Hippo15 motherboard, Tseng ET4000/W32
video, Western Digital 1.6GB EIDE hard disk.

Well, things have settled down now - this has been the upgrade
from hell.  Everything went wrong!   One of my old hard-disks
started playing up and acting flaky and has been removed, this was at 
least one of the problems.  

The new harddisk I purchased had problems (soft & hard errors 
reading) and has now been replaced.	

My old 30 pin SIMMs (via 30->72 pin converters) have been replaced
with new 72 pin SIMMs.

Finally the BIOS settings have been changed to run the PCI
bus at 20 MHz instead of 40 Mhz.

Now I have a system which runs FreeBSD reliably.  I have tried 
to push the machine over (heavy compilation under X with lots
of network traffic) and it seems to be running fine.

BUT if I run DOS and use it to play games (why else?) I have
seen some strange things.  IndycarII runs pretty well but
occasionaly it crashes with a 'Page Fault'.  

Upon rebooting to FreeBSD I usually get a hung system when
the 'routed' daemon starts up, occasionally the system waits
until 'Clearing /tmp' before hanging, and once or twice it has
booted, started X and then crashed after about 30 seconds.
The kernel panic in this case was a page fault.

This is repeatable, a cold-start doesn't help either.  The
only thing that seems to help is to leave the machine powered
down for several minutes before making a cold start.

Any ideas?  What kind of problem could live through a cold-start?

Regards/mark