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Re: [Qemu-devel] Re: POST failure (loop) with isapc and seabios

From: Kevin O'Connor
Subject: Re: [Qemu-devel] Re: POST failure (loop) with isapc and seabios
Date: Wed, 25 Nov 2009 10:31:16 -0500
User-agent: Mutt/1.5.19 (2009-01-05)

On Wed, Nov 25, 2009 at 02:20:39PM +0200, Gleb Natapov wrote:
> On Wed, Nov 25, 2009 at 06:09:51AM +0000, Jamie Lokier wrote:
> > But the BIOS must be reloaded from ROM, I'm guessing, if the keyboard
> > controller method is used and the word asking for a branch back to the
> > application has not been set.  Because that's how a modern OS (if not
> > using ACPI) asks for a system reset.
> > 
> > Do you think the above is (a) correct, and (b) what's implemented?
> > 
> Do different things during reset depending on CMOS values doesn't sound
> right to me. I don't know what is implemented right now. I thought that
> we reload BIOS on reset.

We could have qemu do a soft reset (not reload rom) on a triple fault
or keyboard controller reset, and then have SeaBIOS request a hard
reset (have qemu reload rom) if it detects a soft reset that is not a
"resume" request.

I'm also not sure what qemu does today.


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