On Sat, 2004-05-22 at 15:38, Tom Brinkman wrote:
> On Saturday 22 May 2004 12:36 pm, Lyvim Xaphir wrote:
> > Would you do me a flavor?  In the interests of Science?  To
> > test this theory of mine, that this is perhaps germane to the
> > video card itself, would you turn on system bios shadowing, but
> > leave video shadowing off, and see if your system remains
> > stable.  I'm curious.
> >
> > If in fact you've already tried this, just let me know.
> >  Otherwise, I'm all ears.
> >
> > LX
> 
>     FWIW, video shadowing is generally OK. Enabling further bios 
> shadowing is NOT. 

Not really, Tom, it depends on the individual situation.  I've never had
a problem with bios shadowing under linux and I've been doing it for 12
years professionally in linux systems, both with my systems and with
customer's systems.  System boards that I have had experience with
involving this include Tyan, Asus, Abit, Shuttle, FIC, Young Micro(no
longer in business), MSI, and a bunch of others I can't remember right
now.  Most of the bioses I've encountered have been Award bioses.  I try
to shy away from Phoenix.

As I was saying, Matrox is a special case because it had a wierd bios
that didn't like shadowing.  This was a problem not just under Dos but
apparently also under Winblows and Linux too. I remember this situation
because at one time I was into 2d accelleration back in my Dos gaming
days, and I ran PC Bench alot.  Version 9.

The Matrox would crash the Dos machine when shadowing was enabled. 
Shadowing is always desirable over non-shadowing because accessing the
bios directly is extremely sloooowwwww.  The Matrox card was different
because it just wouldn't work any other way other than shutting down
shadowing.  ATI was the only other manufacturer that ever produced a
card that acted like that, and that was in the 1990's.

LX


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