[LinuxBIOS] VGA (Tyan s2881)
yinghai.lu at amd.com
Fri May 12 22:36:41 CEST 2006
It should be 36k...
From: linuxbios-bounces at linuxbios.org
[mailto:linuxbios-bounces at linuxbios.org] On Behalf Of Ward Vandewege
Sent: Friday, May 12, 2006 1:19 PM
To: linuxbios at linuxbios.org
Subject: [LinuxBIOS] VGA (Tyan s2881)
(forgot attachment, sorry)
I'm trying to get VGA working on the Tyan s2881.
I've extracted a 32KB VGA rom image while running under the proprietary
It looks all right: it starts with 55 AA, has ATI strings in it, and it
just before the next option rom starts with 55 AA.
I've modified the ROM_SIZE in targets/tyan/s2881/Config.lb:
option ROM_SIZE = 491520
I've appended the linuxbios rom to the vgabios, and burned that image.
It boots fine, but no VGA output.
I've verified the contents of the video memory after booting:
dd if=/dev/mem of=vga.bios bs=1 count=32768 skip=786432
The memory area is identical to the vga bios image I extracted.
I've attached the boot log. It sees the VGA device, and it says it
ROM image to 0xc0000, all 0x8000 bytes of it.
I wonder about this halt_sys line:
copying VGA ROM Image from 0xfff80000 to 0xc0000, 0x8000 bytes
PCI: 01:04.0 init
I feel like I'm missing something pretty obvious here. Suggestions?
I also wonder why it's _always_ booting the fallback image. I have the
payload for primary and fallback for now. Is this because there is
Ward Vandewege <ward at fsf.org>
Free Software Foundation - Senior System Administrator
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