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Re: [Qemu-devel] qemu static elf boot / VGA emulation

From: Herbert Pötzl
Subject: Re: [Qemu-devel] qemu static elf boot / VGA emulation
Date: Mon, 28 Jul 2003 04:04:57 +0200
User-agent: Mutt/1.3.28i

On Mon, Jul 28, 2003 at 12:27:50AM +0200, Fabrice Bellard wrote:
> Nicolas Ollinger wrote:
> >Hi,
> >
> >On Thu, 24 Jul 2003, Nicolas Ollinger wrote:
> >
> >
> >>I put a small disk image, kernels, and some files and instructions to use
> >>them under bochs (for comparison purpose) at the following URL:
> >>
> >>http://www.ens-lyon.fr/~nollinge/netbsd_bochs/
> >
> >
> >I just updated the content of the above webpage, it now contains a
> >bootable NetBSD/i386 filesystem which runs just (slowly) fine under bochs.
> >
> >The kernel inside the filesystem is now relocated at 0x90000000 in order
> >to allow qemu boot. So with Fabrice's recent addition of real mode support
> >in qemu, vl is now able to charge the kernel into memory using the usual
> >bootloader. Unfortunately, for some reason, the kernel do not boot at all.
> >No abortion, no fatal error, just... void.
> Try with my latest fix. I think now the problem is that a proper VGA 
> emulation is needed. I plan to add it soon by using an SDL wrapper.
> My only problem is to choose the right SVGA board to emulate (plain VGA 
> is not suffisant to get proper graphical display). I have the following 
> choices:
> - Bochs VBE (easy but limited to 8bpp)
> - VMware virtual SVGA (easy but potential driver license problem)
> - Intel i810 (there are good docs but the acceleration is complicated)
> - Another SVGA card ????

hmm, you want something compatible, then IMHO go for VBE,
but do not limit yourself to the 8bpp modes of bochs,
VBE does define many more ...

on the other hand, it would be beneficial to define
something like VMware SVGA/XGA yourself, drivers can
be easily adapted to such a definition ...


> I am interested by any opinion on that matter!
> Fabrice.
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