[Xorg-driver-geode] Geode LX video testing results

[Bart Trojanowski]

* Bart Trojanowski <bart at jukie.net> [071222 15:47]:
> I think that the x86emu needs to have a black list of ports that it
> should never ever touch even if the BIOS code it's executing requests
> it.  It would seem that port 20 is one of them... but there ought to be
> others.  Like port 0 for example; I don't know if this is a mistake or a real
> port.  What's at port 0?

To answer my own question... port 0 is used to control the first DMA
channel.

Again, I don't think it's a safe thing for the emulator to allow.  I
don't think there is a way to know that no one else is using the first
DMA channel.  Maybe the emulator could fake a DMA transaction.

-Bart

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