[coreboot] ASRock E350M1 video option ROM?

[marcin kowalski]

Regarding ATI cards, (and i assume this board has such card), you can grab
the bios from /proc under linux. That worked for R300/R500 radeon video
cards, maybe it still works on more recent ones :

as root:
cd /sys/bus/pci/devices/<pci bus id>/
echo 1 > rom
cat rom > /tmp/vbios.rom
echo 0 > rom

Keep in mind, i am not sure it's 100% complete ram bios, but that's what
xorg ati devs suggested as steps to dump the bios when identifying some
bugs with radeon hardware on linux.

2012/3/12 Andrew Goodbody <ajg4tadpole at gmail.com>

> On 11/03/12 05:04, Scott Duplichan wrote:
>
>> I know of two ways to extract the legacy video option rom:
>>
>> a) Download the image from the manufacture's web site:
>>    1. ftp://174.142.97.10/bios/CPU/**E350M1(1.50)ROM.zip<ftp://174.142.97.10/bios/CPU/E350M1%281.50%29ROM.zip>
>>    2. Extract the 4MB UEFI image (E350M11.50)
>>    3. Use 7-zip (version 9.21 beta) to decompress.
>>    4. Hex edit this file: E350M1(1.50)ROM\2\CSMCORE\1.**raw
>>    5. Find the start of the video option rom. It starts with
>>       55 AA and contains text "AMD Fusion Wrestler generic VBIOS"
>>    6. The length is the byte after 55 AA (71) * 200h = E200h.
>>    7. Extract E200 bytes starting at 55 AA.
>>
>> b) When the board arrives...
>>    1) Boot MSDOS and start DOS debug
>>    2) At the - prompt, enter these commands:
>>       -n vga.bin
>>       -rbx
>>       -1
>>       -w
>>    3) The option rom is vga.bin in the current directory.
>>
>> Thanks,
>> Scott
>>
>
> a) is good.
> b) is just going to get you 64KB of unintialised data. There is nothing in
> those instructions to access the video BIOS AFAICT.
>
> Andrew
>
>
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>
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