Date: Fri, 9 Jul 1999 05:32:40 -0400 (EDT) From: "Brian F. Feldman" <green@FreeBSD.org> To: Stephen Hocking-Senior Programmer PGS Tensor Perth <shocking@prth.pgs.com> Cc: current@FreeBSD.org Subject: Re: MTRR stuff Message-ID: <Pine.BSF.4.10.9907090530540.67474-100000@janus.syracuse.net> In-Reply-To: <199907090232.KAA04002@ariadne.tensor.pgs.com>
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On Fri, 9 Jul 1999, Stephen Hocking-Senior Programmer PGS Tensor Perth wrote:
> For some video cards (to wit, the voodoo stuff), the MTRRs should be set up as
> follows
>
> write-combining
> +----------------------------------------------------------+
> +-------+
> uncacheable
>
> i.e. the two regions have the same starting area, but the small chunk for the
> registers should be uncacheable. When I try to do this using memconf on my
> K6-2, it spits the dummy. Is there a work around for this?
Spits the dummy? And do you mean memcontrol?
I have no idea what you mean by that. However, the natural thing to do would
be this:
+-------+ write-combine uncacheable
+----------------------------------------------+ uncacheable
>
>
> Stephen
> --
> The views expressed above are not those of PGS Tensor.
>
> "We've heard that a million monkeys at a million keyboards could produce
> the Complete Works of Shakespeare; now, thanks to the Internet, we know
> this is not true." Robert Wilensky, University of California
>
>
>
>
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