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From
SubjectRe: cpu reset on laptops and microcode update.
Date
Followup to:  <Pine.LNX.4.21.0009210946410.1060-100000@saturn.homenet>
By author: Tigran Aivazian <tigran@veritas.com>
In newsgroup: linux.dev.kernel
>
> A long time ago I noticed a curious feature on my Dell Latitude CPx
> H-450GT laptop - rebooting it via "shutdown -r now" (and therefore going
> through BIOS) does not discard the microcode applied to the CPU. But I
> would expect it to be discarded as prescribed by Intel manuals, on #RESET.
>
> Does it mean that rebooting a laptop does not actually ever reset the
> CPU? (this would imply that the BIOS is also a protected mode software?)
>

Most CPU's aren't... instead the system assert INIT.

-hpa
--
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt
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