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Date:      Fri, 28 Jun 1996 18:31:33 -0700 (PDT)
From:      Howard Lew <hlew@sequence.Stanford.EDU>
To:        Jeffrey Wheat <jeff@tad.cetlink.net>
Cc:        Eduardo Costa <costa@supra.pt>, freebsd-questions@FreeBSD.ORG
Subject:   Re: Cyrix Processors
Message-ID:  <Pine.OSF.3.91.960628181727.18140B-100000@aeffle.Stanford.EDU>
In-Reply-To: <199606281559.LAA05374@tad.cetlink.net>

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On Fri, 28 Jun 1996, Jeffrey Wheat wrote:

> I have upgraded 2 of my servers to the P166+ (Cyrix) and FIC PA-2002 mainboards.
> I have had some problems with this. For starters, a kernel compiled with only
> the I586_CPU will not boot. When compiled with both the I486_CPU and I586_CPU
> options, the kernel will boot, but the cpu is identified as a 486 cpu. Next, 
> X will not start using xinit. I have to start X with xdm to get things to go.
> WHen I was using an AMD DX4-100 CPU, X would start and the system would then
> perform well. I have tried to compare the performance of the AMD and the Cyrix
> chips, as well as with a P100 machine (all identical OS and periphials) and the
> P100 outperforms both. I am also interested in other peoples results as I can
> not justify upgrading anymore machines at this time. Lastly, the Cyrix machine
> will randomly crash without any logs or warnings. This is unpredictable.
> 
> Regards,
> Jeff
> > 
> 

Although the PA-2002 board has jumper settings for 166+, it may not
officially support the P166+ chip.  Last time I checked Cyrix's web site,
the fastest I saw was the 6x86 P150+.  However, it does support the 
Pentium 133 & 166.

You might want to flash the bios to the latest version.  If that doesn't
work you might want to drop the speed to P150+ and see if the problems go
away.


----

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