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Re: Subject: Re: [Qemu-devel] VGA BIOS source code
From: |
Kyle Hayes |
Subject: |
Re: Subject: Re: [Qemu-devel] VGA BIOS source code |
Date: |
Mon, 31 May 2004 21:14:08 -0700 |
User-agent: |
KMail/1.5.4 |
On Monday 31 May 2004 13:17, Bartosz Fabianowski wrote:
> Alright, after digging into QEMU's graphics card emulation and into the
> VGA BIOS source, I came to a few conclusions:
>
> a) SDD 6.53 is doing something utterly wrong. [snip]
>
> c) [snip] The entire VESA VBE
> implementation is rather broken, shaky and incomplete.
>
> b) The way the graphics card is emulated by QEMU (and Bochs and plex86
> for that matter) is totally inefficient, error-prone and overly
> complicated. [snip]
Is there a reasons for the a c b ordering?
I think you are probably a little harsh on this code. It may be far from
perfect, but it does (mostly) work.
> d) Finally, as a conclusion from a) to c), I believe it would be best to
> ditch the entire VGA BIOS and implement all functions of the graphics
> card in C, natively, inside QEMU. This will be more efficient and less
> error prone. Now, I haven't seen the patches mentioned by Fabrice that
> emulate a CLGD54xx. But I certainly hope it is all native and not a
> half-native half-emulated solution like the current one.
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.
The Cirrus Logic chipset sounds like a good one for this.
Best,
Kyle
- Re: Subject: Re: [Qemu-devel] VGA BIOS source code,
Kyle Hayes <=
- Re: Subject: Re: [Qemu-devel] VGA BIOS source code, Bartosz Fabianowski, 2004/06/01
- Re: Subject: Re: [Qemu-devel] VGA BIOS source code, Fabrice Bellard, 2004/06/01
- Re: Subject: Re: [Qemu-devel] VGA BIOS source code, Derek Fawcus, 2004/06/01
- Re: Subject: Re: [Qemu-devel] VGA BIOS source code, Hetz Ben Hamo, 2004/06/01
- Re: Subject: Re: [Qemu-devel] VGA BIOS source code, Jan Fabianowski, 2004/06/01
- Re: Subject: Re: [Qemu-devel] VGA BIOS source code, Johannes Schindelin, 2004/06/02
- Re: Subject: Re: [Qemu-devel] VGA BIOS source code, Bartosz Fabianowski, 2004/06/02