Kevin,
Attached is the new option rom mapping patch. I was hunting around for an existing SeaBIOS ftn that would convert ascii strings to a binary value (i.e. sscanf) but couldn't find one. If there's already one in the code I can replace the text_to_binary() with it.
I tested this on a AMD family14 platform. The vendev-map file I added to CBFS looks like this...
10029803-10029802 10029804-10029802 10029805-10029802 10029806-10029802 10029807-10029802 10029808-10029802 10029809-10029802
Each line ends with a NEWLINE character (0x0A).
On my test platform the actual graphics ID of the part is 10029804. The vgabios gets added to CBFS with the name "pci1002,9802.rom".
Thanks, Dave