[coreboot] SeaBIOS not running vga rom
Kevin O'Connor
kevin at koconnor.net
Wed May 13 05:13:54 CEST 2009
On Tue, May 12, 2009 at 09:58:11PM -0400, Joseph Smith wrote:
> Well it would be hard to fit 2 years of research into this email but in a
> nut shell I am going to be doing some direct framebuffer manipulation to
> get the tv-out working. I need to do this AFTER the VGA ROM runs and sets
> up the initial graphics. Therefore the current ROM emulators in coreboot
> will let me achieve this because they return to coreboot thus allowing me
> to run code directly manipulating the framebuffer.
Random ideas:
- hack the tvout stuff into seabios instead of coreboot
- place the tvout stuff in an elf, and have seabios run it like a
payload
- place the tvout stuff into an option rom and tell seabios to run it
- teach seabios to return to coreboot
- run the vga bios from both coreboot and seabios and hope it doesn't
reset your registers
- initialize the vga card without a vgabios; replace factory vgabios
with the open source vga bios
-Kevin
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