I don't know what the problem is, I don't have an EPIA-M yet.
One thing you could do with a PCI analyzer is watch the ins and outs and look for a magic setting.
Are your sure the clock source for the superio or uart is the same for linuxbios and award?
disassembly is a bad idea.
The "emulator for VGA bios" will actually run anything that looks like a bios. I've run T23 bios on a T23 (and crashed the T23 that way). So that works.
ron