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[Qemu-devel] Re: Seabios dislikes -M isapc


From: Jan Kiszka
Subject: [Qemu-devel] Re: Seabios dislikes -M isapc
Date: Mon, 08 Feb 2010 20:09:17 +0100
User-agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666

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

-- 
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux




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