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SubjectRe: That horrible hack from hell called A20


On Wed, 6 Dec 2000, Kai Germaschewski wrote:

>
> On Tue, 5 Dec 2000, H. Peter Anvin wrote:
>
> > If you have had A20M# problems with any kernel -- recent or not --
> > *please* try this patch, against 2.4.0-test12-pre5:
>
> Just a datapoint: This patch doesn't fix the problem here (Sony
> PCG-Z600NE). Still the spontaneous reboot exactly the moment I expect to
> get my console back from resumeing.

Can you test whether it's the "and 0xfe" or the "or $2" that does it for
you?

Right now we know that the Olivetti M4 has problems with the "or $2". I'd
like to know if this is the same bit #1, or whether it's #0.

[ And I agree with Peter - if somebody knows BIOS programming and how to
use "int 15" to enter protected mode, then that migth well be the
easiest solution. The only real reason the linux setup code does it by
hand is that the original code was written that way - and it was written
that way because I had never used the BIOS in my life before, _and_ I
wanted to learn the i386. Both of which were valid reasons back in 1991.
Neither of which is probably a very good reason ten years later ;]

Linus

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