[OpenBIOS] Video (particularly 440GX)

[Chong Chee Yong]

On Mon, 21 Feb 2000, Ronald G. Minnich wrote:

> the second device on the bridge is in essence a dedicated pci bus for the
> graphics hardware. 

so, i gather that this dedicated pci bus connects to the graphics chipset.
and since it appears as another pci device, it must implement the pci
configuration space, and thus it has an expansion ROM base address
register which we can determine if a BIOS exist or not. If it has one,
then it is likely that the initialization of the graphics chip is done by
the this BIOS instead of the system BIOS.

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