*BSD News Article 45270


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Newsgroups: comp.unix.bsd.freebsd.misc
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From: mikel@netcom.com (Mikel Lechner)
Subject: Re: 2.0.5A on P90 with 96Mbytes
Message-ID: <mikelD9LzIz.FH1@netcom.com>
Organization: NETCOM On-line Communication Services (408 261-4700 guest)
References: <3ql2uf$sdr@bambam.soi.city.ac.uk>
Date: Sat, 3 Jun 1995 18:04:11 GMT
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Sender: mikel@netcom9.netcom.com

tim@sarc.city.ac.uk (Tim Wilkinson) writes:

>I tried the 2.0.5 Alpha release of FreeBSD on our systems here today
>(after building them from the source).  On our 16M P66 machines they work
>just fine, but on our 96M P90 system it blows up as soon as it begins to
>fsck the disks (usually with a divide by zero error in the kernel although
>occasionally I've seen a 'page not present' fault).

This sounds very similar to a problem I'm having with a DELL 66Mhz/486 system.
I've found that if I use the BIOS to set the CPU speed to "Compatible"
(8MHz ?), then the system runs fine, albeit much slower.  Of course this
isn't very pratical, but it does indicate to me that the problem may be
the timing on the I/O bus.  I was planning to try putting delays into
the I/O functions in "cpufuncs.h", but haven't tried it yet.  Perhaps
someone else has some other ideas.



-- 
Mikel Lechner
Unix Software Contractor