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    SubjectRe: APIC and some timers stuff

    On Thu, 24 Feb 2000, Artur Skawina wrote:

    > > same. But the local APIC can be disabled on RESET in Pentium chips and by
    > > software means on P6 CPUs. Once disabled it cannot be enabled till the
    > > next RESET.
    >
    > p6_enable_apic()
    > {
    > unsigned rl, rh;
    >
    > rdmsr( 27, rl, rh );
    > wrmsr( 27, rl^(1<<11), rh );
    > }

    does this always work? I believe there is some pin that disables the APIC
    permanently - is this really the case?

    anyway, in 2.5 we can explore this stuff - right now we already have
    IO-APIC on UP, and a trivial patch enables compiling APIC support but no
    IO-APIC.

    -- mingo


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