Re: qemu oddness with isolinux vesamenu.c32

["H. Peter Anvin" <hpa@zytor.com>]

H. Peter Anvin wrote:
> 
> Yes, although simulating the memory "pre-shadowed" works just as well; 
> then it should be marked readonly by the BIOS immediately prior to 
> running INT 19h.
> 

On top of this, getting proper DDIM support and PCI expansion ROM into 
the BIOS would be a good thing.  A PCI expansion ROM is attached to a 
PCI device as a BAR and mapped into high memory, it is then copied to 
shadowed RAM by the BIOS and its initialization stub is run.  This is 
done one device at a time, so that the initialization code can be 
discarded, per the DDIM spec.

	-hpa