[SeaBIOS] [PATCH] Support more than one vga card

Kevin O'Connor kevin at koconnor.net
Wed May 4 02:51:24 CEST 2011

On Tue, May 03, 2011 at 09:41:48PM -0300, Glauber Costa wrote:
> On Tue, 2011-05-03 at 19:58 -0400, Kevin O'Connor wrote:
> > My understanding is that in a machine with multiple VGA devices only
> > one vga device is setup to forward the legacy VGA IO ranges over PCI,
> > and only that device should have its option ROM executed.
> > 
> > My understanding is that running the vga option roms for all vga
> > devices would be incorrect and could cause a real machine to not boot
> > properly.
> how's that different in pci vs vgaroms/ ?
> "Could cause a real machine to not boot" is true regardless.

I don't understand your question.  For regular PCI devices every
option rom should be run, regardles of how many devices are in the
system.  VGA option roms are special though - my understanding is
exactly one VGA device should have its option rom executed.


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