Hi Lester,
You'll probably be surprised by the function of most of the contacts since they do nothing more than communicate the min and max apertures of the lens, but it's pretty well spelled out this page:
http://www.robertstech.com/matrix.htm
B Dimitrov has the same info on his site, but it's hard to find the page -- I stumbled upon it once, and cannot find it again. . .
What you have to do to allow Focus Trap (CIF) with AF lenses is to short the "Data" pin with conductive material -- most use Aluminum foil, but some use metal tape. The Data pin is only used by AF lenses, so shorting it tells the camera body that there is no pin there, and that must indicate a MF lens. This obviously not harmful to the camera since a K, M or A series lens would have bare metal of the mount there, which shorts the pin.
Scott