Hi Nathan,
there was some discussion on the coreboot mailing list, and it seems that the SGABIOS binary doesn't have a checksum calculated for it, which means that some BIOSes refuse to initialize it.
The SeaBIOS project maintained by Kevin has a utility for calculating checksums, available at:
http://git.linuxtogo.org/?p=kevin/seabios.git;a=blob;f=tools/checksum.py;h=8...
Kevin, I can't find that buildrom.py script in seabios.git?
//Peter
----- Forwarded message from Kevin O'Connor kevin@koconnor.net -----
From: Kevin O'Connor kevin@koconnor.net To: coreboot@coreboot.org Subject: Re: [coreboot] SeaBIOS, serial output, and grub Date: Thu, 14 May 2009 09:19:33 -0400
On Wed, May 13, 2009 at 11:23:52PM -0400, Ward Vandewege wrote:
which is correct (the last two digits are 00).
Huh:
$ v ../payloads/sgabios.bin -rwxr-xr-x 1 root src 3169 2009-04-29 13:56 ../payloads/sgabios.bin* $ tools/checksum.py <../payloads/sgabios.bin sum=50b76
Heh - sgabios isn't properly checksumming. It was just dumb luck that my binary summed to zero.
This is a hack, but you can use seabios' rom building tool to make it work:
tools/buildrom.py ../payloads/sgabios.bin sgabios-cksum.bin
Someone should follow up with google on this..
-Kevin