[coreboot] Seabios configuration

Kevin O'Connor kevin at koconnor.net
Tue Mar 17 17:51:00 CET 2009

On Tue, Mar 17, 2009 at 09:23:32PM +0800, Wang, Qingpei wrote:
> Hi all,
>     I just followed the instruction of http://www.coreboot.org/SeaBIOS
> concern about #define CONFIG_OPTIONROMS_DEPLOYED 0 , 
> But It can not show the video output correct. Maybe something wrong with
> it.

If you have a built-in VGA device that requires an option rom from
flash, then you also need to set something like:

#define OPTIONROM_BDF_1 pci_to_bdf(0x01, 0x00, 0)
#define OPTIONROM_MEM_1 0xfffc0000

in src/config.h.  Adjust the BDA and memory location to correspond to
the rom location and the Bus/Dev/Fn for the vga card as reported by
lspci (eg, the above would correspond with "01:00.0" with the option
rom at the start of a 256KiB flash).


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