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SeaBIOS (previously known as LegacyBIOS) is an open-source legacy BIOS implementation, which can also be used as coreboot payload.
Any software requiring 16-bit BIOS services benefits from SeaBIOS.
Windows XP has been booted on real hardware with coreboot and SeaBIOS. Some patches are required.
Windows Vista (64/32 bit) has been booted on real hardware with coreboot and SeaBIOS. Some patches are required.
Windows 7 Beta
Windows 7 Beta (?? bit) has been booted on real hardware with coreboot and SeaBIOS. Some patches are required.
GRUB works with coreboot and SeaBIOS on real hardware and boots Linux just fine.
You can download the latest version of SeaBIOS through a git repository:
$ git clone git://git.linuxtogo.org/home/kevin/seabios.git seabios $ cd seabios
Edit src/config.h and set the following values:
#define CONFIG_COREBOOT 1 #define CONFIG_DEBUG_SERIAL 1 #define CONFIG_PCIBIOS 0
$ make AVOIDCOMBINE=1
(the AVOIDCOMBINE=1 is not necessary with recent gcc versions, just use make)
The final SeaBIOS payload file is out/bios.bin.elf, which can be used with coreboot v2 or v3.
Finally, you have to build coreboot (v3 in this example) with SeaBIOS as payload:
$ cd .. $ svn co svn://coreboot.org/repository/coreboot-v3 $ cp seabios/out/bios.bin.elf coreboot-v3/payload.elf $ cd coreboot-v3 $ make menuconfig
Now enter the Payload menu and select Payload type and then An ELF executable payload file. Now exit the menu, save your settings, and build coreboot:
The file build/coreboot.rom (or build/bios.bin) is your final coreboot v3 image, which also contains the SeaBIOS payload.
Running SeaBIOS in QEMU
For running coreboot+SeaBIOS in QEMU, you need a patched version of vgabios-cirrus.bin in your build directory first:
$ cd build $ wget http://www.coreboot.org/images/0/0d/Vgabios-cirrus.zip $ unzip Vgabios-cirrus.zip $ cd ..
You can now run SeaBIOS in QEMU:
$ qemu -L build -hda /dev/zero -serial stdio
Ready-made SeaBIOS QEMU image
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