Re: Subject: Re: [Qemu-devel] VGA BIOS source code

[Bartosz Fabianowski <bartosz@fabianowski.de>]

> Is there a reasons for the a c b ordering?

No ;)

> I think you are probably a little harsh on this code.  It may be far from 
> perfect, but it does (mostly) work.

Yes, it does work. Maybe I was a bit harsh in my wording after wasting a 
day on it, sorry.

> Getting something in place that pretends to be a known chipset and that can 
> act like a dumb framebuffer would probably help.  That seems to be the 
> direction that Fabrice and Co. are going.  

That seems like a good idea. Though if you are pretending to be some 
particular chip set, you should be prepared to emulate the most weird 
register settings that drivers could set for that chip set. So if the 
goal is to reach close to 100% compatibility, I fear a substantial 
subset of the entire spec for the chosen subset will have to be implemented.

Since my main interest is in running Windows inside QEMU, I could also 
envision adding another driver later, similar to what is done in VMWare. 
It would be a windows driver that acts as a dumb stub and forwards every 
request to the dumb side. Since it would be designed from the ground up 
only for QEMU, it could be limited in its functionality to really only 
being a frame buffer and nothing else. This would probably accelerate 
the emulation quite a bit.

- Bartosz