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Date: Mon, 11 Dec 2000 13:22:18 -0600
From: Timur Tabi <ttabi@interactivesi.com>
To: linux-kernel@vger.kernel.org
In-Reply-To: <F394unQVK110xQGocT0000136aa@hotmail.com>
Subject: Re: fatal lockup, BIOS/CMOS reset?
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** Reply to message from "Jonathan Brugge" <jonathan_brugge@hotmail.com> on
Sun, 10 Dec 2000 22:49:05 +0100


> I got a message about a bad CMOS and when I looked in my 
> BIOS-settings I saw they were totally reset... No HD's, date was 1/1/2000, 
> etc.

The BIOS will do this at boot time if it detects that the checksum bytes in the
CMOS are incorrect.  That's probably what happened - somehow, one or more bytes
in your CMOS got altered, and during the reboot the BIOS detected this and reset
all CMOS bytes.

The CMOS can be programmed using I/O ports 70h and 71h.  Just a couple of bad
I/O operations to those ports, and your CMOS is toast.


-- 
Timur Tabi - ttabi@interactivesi.com
Interactive Silicon - http://www.interactivesi.com

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