Glauber Costa wrote:
On Wed, 2011-05-04 at 00:02 +0200, Sebastian Herbszt wrote:
Anthony Liguori wrote:
> On 05/03/2011 03:23 PM, Sebastian Herbszt wrote:
>> Glauber Costa wrote:
>>> It is theorectically possible for a system to have more than
>>> one pci vga card. In particular, I am interested in the use of SGAbios
>>> as a pci device, alongside of a normal vga bios in QEMU.
>>
>> Can't SGAbios be loaded as an option rom without this change?
>
> But then you're loading it as a legacy ROM which is fairly ugly and
> requires additional SeaBIOS hackery.
Why is this ugly and which additional hackery does it need?
SGAbios is a legacy ROM; the PNP header is disabled and there is no PCIR.
It is, but does not need to be (I've also patched sgabios to include a
PCIR). Since it is a device, it is nice to have it plugged it to a bus.
If for nothing else, for discovering capabilities - A guest using
sgabios this way is now aware that it has a double-head system.
I don't think "it is a device", more likely a functionality. SGAbios doesn't
add a new
device/hardware to the system.
Do you plan to add a new (emulated) PCI device and deploy SGAbios thru its BAR?
Do you plan to add support for "Google Memory Console"?
Also, let us not focus only in the specifics: Having two pci vga cards
is a real possibility, there's even a use case for that, as anthony
mentioned.
If you call the init function of two vga roms, will the last one win and hook
int 10h?
Sebastian
_______________________________________________
SeaBIOS mailing list
[email protected]
http://www.seabios.org/mailman/listinfo/seabios
