... LinuxBIOS is much more clean because the 32-bit mode it uses is thoroughly defined in Intel's Manual, no confusion about how to enter the processor operating mode. ...
... Pay attention to the chipset datasheet as you read through (and/or disassembly) the BIOS code.
--Darmawan
Yes. Find yourself Intel's processor manual and any of the northbridge chipset datasheet. I think they will help a lot.