Messages in this thread | | | Date | Mon, 11 Dec 2000 13:22:18 -0600 | From | Timur Tabi <> | 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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