shadowing video

[Martijn van Oosterhout]

On Wed, Oct 30, 2002 at 07:57:58PM -0800, Gary Woodman wrote:
> Thinking back, I've never heard of a protected-mode BIOS for
> Intel-based PCs, except the late (un)lamented ABIOS for IBM's MCA
> family, so NT/2000/XP (not to mention OS/2, Netware, *BSD, BeOS) can't
> benefit from BIOS shadowing either.

Well, I seem to remember that the VESA BIOS (video card) could provide a
protected mode entry point to allow one to call certain functions while in
protected mode. Mostly the bank switching and mode switching.

Also, APM on laptops requires support from the BIOS, though I don't know
whether that's in protected mode or not.
-- 
Martijn van Oosterhout   <kleptog at svana.org>   http://svana.org/kleptog/
> There are 10 kinds of people in the world, those that can do binary
> arithmetic and those that can't.
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