[coreboot] Modular BIOS Interface

Joseph Smith joe at settoplinux.org
Tue Oct 7 13:44:11 CEST 2008

> I'll be doing similar work in next few months, my goal is to get
> displayfrom coreboot-like environment, and I'm not planning to use
intel's vbios,
> my experience tells me vbios is not an absolute necessecity, so the BMP
> or MBI stuff won't be bothered either. The idea is not verified, but I
> think it's worth a try.

Your right. My experiance tells me Intel's vbios is not necessary also. It
is possible to get the vga and any sub-chips running without the vbios, but
the problem with that is Linux (or other OS's) do not play well. You have
to set them up to use the Intel frame buffer instead of the the normal
"intel" X driver. It's alot of work, on both the coreboot end and the Linux

My theory is to use a normal vbios, after coreboot initializes vga setup
the i2c lines, and then program the sub-chip (tv, LVD, etc).

Joseph Smith

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