Hi, > I started converting the VGA bios from the "lgpl vga bios" project ( > http://savannah.nongnu.org/projects/vgabios/ ) a couple of years ago. > I converted the base code, but did not have time to convert the "VBE" > or the "cirrus" code.
qemu uses the lgpl vga bios too, slightly modified version, git tree is at git://git.qemu.org/vgabios.git >> I am currently working on a emulated graphic adapter for Xen and I >> would like to implement a VBE driver for it. This VGA BIOS seems to be >> a good base for that kind of work. Would that be possible ? > > It should work. Ideally, someone would complete the port of the "lgpl > vgabios". This involves translating the remaining 16bit assembler to > C code and then doing lots of testing on the result. Just curious: What kind of graphic adapter do you plan to create? The vgabios+qemu have two different ways to handle VBE support: One is the cirrus emulation, where the vgabios programms the cirrus like real hardware. The other one is the bochs vbe support. That is basically a side channel which allows the bios to program video modes in a very simple way using special I/O ports. All non-cirrus vga cards emulated by qemu (std, vmware, qxl) support that. Supporting the bochs vbe interface for one more model is just a matter of adding a few lines with the PCI IDs to the vgabios.git Makefile. If you don't want or don't can go this route it is most likely easier to go with the C version in the seabios.git tree than touching the vgabios.git assembly code. HTH, Gerd _______________________________________________ SeaBIOS mailing list SeaBIOS@seabios.org http://www.seabios.org/mailman/listinfo/seabios