Th99 has been well known for donkeys years. Uh19 link is in my sig. (Only motherboards at the moment)
Th99 is a very good source of information, I have a local copy and an abridged copy of Microhouse Technical Library which it is derived from. I've used th99 for over 20 years. BUT there are 1000s or errors on it. We are building off of it and when you know it well you see all the cracks. Over time we are revising just about everything. We now have solid chipset and cpu compatibility identification. There are still errors from th99 but we are fixing them every day.