Anyone else have dissected award BIOS source code ?

After disassembling my BIOS binary (dated 28 July 2000) and comparing it with the source code available to me (1997-1999), I found that the source code is some kind of a "certain mixture" of award BIOS 1998 and 1999 code. From this fact I'm quite sure there has to be a release of award BIOS "base code" in between this releases that "close enough" to my BIOS binary disassembly result. As a note, there are several routine that I can't found in those source code which resides inside the disassembly result. If another "BIOS hacker" here have found a better explanation on this, or if you have an award BIOS source code for VIA chipset based motherboard around early 1999, please let me now. Thx