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SubjectRe: fatal lockup, BIOS/CMOS reset?
** Reply to message from "Jonathan Brugge" <> 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 -
Interactive Silicon -

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