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From: "Rusty Lynch" <rusty@linux.co.intel.com>
To: "Alan Cox" <alan@lxorguk.ukuu.org.uk>,
       "Benoit GRANGE" <Benoit.GRANGE@fr.tiscali.com>
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References: <8B5E8461FFB6B44F85E3504A81AF3D9117616C@frparex01.fr.tiscali.com> <1038354638.2534.76.camel@irongate.swansea.linux.org.uk>
Subject: =?iso-8859-1?Q?Re:_RE=C2=A0:_Clock_is_suddently_ticking_too_fast_!_=5BKer?=
	=?iso-8859-1?Q?nel2.4.19-pre10-ac2=2C_Intel=5D?=
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> On Tue, 2002-11-26 at 20:22, Benoit GRANGE wrote:
> > Alan Said:
> > > Does this stop if you boot with "noapic"
> > I will try, but the clock frenzy happens only once every full moon...
> > it won't be easy to tell.
> > By the way, can you refer me to some nice documents explaining what is
apic ?
> > Regards,
> > Benoit Grange
>

There is also the "Multiprocessor Specification" that talks about APIC.
You can get to the document from:
http://www.intel.com/design/pentium/datashts/242016.htm

> Old IBM PC has PIC (peripheral interrupt controller) - does the 16 IRQ
> lines and attaches them to the CPU
>
> Modern PC also as APIC (advanced peripheral interrupt controller) which
> is in two parts - locsl apic is on the CPU, and talks over a link to one
> or more io-apics that attach to the devices on the bus
>
> "noapic" says to run the box like an old IBM PC
>
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