I hate to say it, but you are going to probably have to give up on that chipset absent docs. I have the "DOCS" as intel ships them from developer.intel.com, and, unlike what you could get in 1999, the current set of docs are totally worthless for writing a BIOS. I am told this is intentional. I have had it put to me that this policy simplifies EFI lockin -- no competition.
Sorry
ron