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    SubjectRe: KERNEL BUG: console not working in linux
    Date
    Followup to:  <20001128041409.A9525@veritas.com>
    By author: Andries Brouwer <aeb@veritas.com>
    In newsgroup: linux.dev.kernel
    >
    > On Mon, Nov 27, 2000 at 05:40:58PM -0800, H. Peter Anvin wrote:
    >
    > > > What about adding an additional
    > > >
    > > > andb $0xfe, %al
    > > >
    > > > in front of the outb?
    >
    > > Already in test12-pre1.
    >
    > Ach, I see I am too slow - had not even seen -pre1 and now Linus
    > already announces -pre2.
    >
    > Anyway, I considered that this A20 stuff belonged to my docs on
    > the keyboard controller, so added a page
    >
    > http://www.win.tue.nl/~aeb/linux/kbd/A20.html
    >
    > (written half an hour ago). Comments are welcome.
    >

    One thing... the "thwarted by cache" comment probably isn't very
    useful. As far as I know the only machines which have the cache
    problem are i386 boxen, but the i386 doesn't have WBINVD. The i486
    has a pin on the CPU for A20, which takes effect inside the L1 cache,
    and so it shouldn't have any A20 cache issues.

    -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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