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
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