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Date: Mon, 08 Feb 2010 20:09:17 +0100
From: Jan Kiszka <jan.kiszka@siemens.com>
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Subject: [Qemu-devel] Re: Seabios dislikes -M isapc
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To: Sebastian Herbszt <herbszt@gmx.de>
Cc: Kevin O'Connor <kevin@koconnor.net>, qemu-devel <qemu-devel@nongnu.org>

Sebastian Herbszt wrote:
> Jan Kiszka wrote:
>> Hi,
>>
>> Seabios seems to have some assumptions built in that break when -M isapc
>> is selected. Is this supposed to work or is isapc about to die?
> 
> SeaBIOS doesn't POST if the F-segment is not writeable [1]. A possible, but IMO
> wrong fix was posted on the list [2].
> 
> [1] http://lists.gnu.org/archive/html/qemu-devel/2009-11/msg01188.html
> [2] http://lists.gnu.org/archive/html/qemu-devel/2009-12/msg00445.html
> 

Indeed, [2] makes it work again.

But taking away IO_MEM_ROM really looks like a lazy workaround. I don't
know how much Seabios needs to write - can't it use normal RAM for this?

Jan

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