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Date:      Wed, 8 Mar 2000 22:48:36 -0500
From:      Coleman Kane <cokane@one.net>
To:        Mike Smith <msmith@freebsd.org>
Cc:        Coleman Kane <cokane@one.net>, Roman Shterenzon <roman@ksl.co.il>, green@freebsd.org, stable@freebsd.org
Subject:   Re: K6-MTRRs
Message-ID:  <20000308224836.A37351@evil.2y.net>
In-Reply-To: <200003081800.KAA03550@mass.cdrom.com>; from msmith@freebsd.org on Wed, Mar 08, 2000 at 01:02:08PM -0500
References:  <20000308123838.C20193@evil.2y.net> <200003081800.KAA03550@mass.cdrom.com>

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Mike Smith had the audacity to say:
> > That's the impression I was under. I have gotten no information from AM=
D to say
> > that the MTRRs on their K6-2 line don't work. The only things I know of=
 is that
> > the first-gen chips didn't have them, and the code checks for that. Are=
 you sure
> > that it isn't some interpretation problem with the tech docs?=20
>=20
> If the original K6's don't have memory range registers, how could we have=
=20
> tested them and discovered they didn't work? =20
>=20
> At any rate, you're encouraged to talk to the author/maintainer of the=20
> code, Brian Feldman (copied).  If you can make it work, wonderful.
>=20

Maybe that's it, the original K6 had them but they were "disabled" or at le=
ast
ignored. I believe that the new K6-2 cores with CXT core have working MTRRs
because I remember that being a big thing as well as the cache pipelining.

Maybe I should get in touch with AMD on the matter as well.
--cokane

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