I am not aware of a definitive list that explains all of the BIOS features and what they do and I wish that I could find one.
Most of the time, I tend to use Google and Wikipedia in my efforts to discover answers but I have to say that I am not always successful.
Maybe, you could list the specific items in BIOS that you want answers to. Some may already be known but the more heads looking into it the better and I am sure that others could contribute, benefit and offer answers.