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Re: grub-dumpbios

From: Stefan Reinauer
Subject: Re: grub-dumpbios
Date: Mon, 04 May 2009 22:28:52 +0200
User-agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.1b3pre) Gecko/20090223 Thunderbird/3.0b2

On 04.05.2009 21:27 Uhr, Robert Millan wrote:
> Hi,
> Do we really need to ship a specific utility just to run two commands?
>   dd if=/dev/mem of=${output_dir}vbios.bin bs=65536 skip=12 count=1
>   dd if=/dev/mem of=${output_dir}int10.bin bs=4 skip=16 count=1
> Sounds like user will need to read some documentation in order to figure
> out what grub-dumpbios is good for, and what to do with those files, so
> why not just document the commands there instead?  (e.g. in the wiki or
> so)
As a side note: On many machines dumping the VGA option rom like that
does not produce good option rom images. Many option roms are
self-modifying and the above method only dumps the modified variants of
the ROMs that are normally not good for "POSTing" a graphics card
anymore. They're still good for other purposes though I guess.


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