Hi!

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        pushl   $0                                              # Kill any dangerous flags
        popfl

        movl    real_magic - wakeup_code, %eax
        cmpl    $0x12345678, %eax
        jne     bogus_real_magic

        testl   $1, video_flags - wakeup_code
        jz      1f
        lcall   $0xc000,$3

The call to 0xC000:0x0003 is the entry point to POST the card. However 
for PCI cards you need to make sure that AX is loaded with the bus, slot 
and function for the card that is being POST'ed. It will pass this value 
to the PCI BIOS Int 0x1A functions in order to find itself, so if this is 
not set many BIOS'es will not work.

Ok, this one is bad... ... In case of just one vga adapter, we
should be able to store its parameters in some well-known place.
For more than one adapter, we'll definitely need to run BIOS in
emulator. 

Yes. If you are running this in real mode you don't have any option but 
to use the BIOS emulator. If you are running in protected mode and using 
vm86() style service, the 0xC0000 memory is just memory and can be re-
written. For instance on Linux you can map 0xC0000 into your process 
address space as copy on write, which then allows you to re-write the 
BIOS image for a secondary controller and then restore it when you are 
done.

One more question: Does 0xc0000 POST method work even on notebooks? On
regular machines, PCI card must have normal bios and stuff is easy. On
notebooks there was talk about "integrated bios" where it really has
no video bios at all and system bios POSTs the card. Have you seen
that?
								Pavel
-- 
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