ibook touchpad and ADB interfacing

i have a few old ibooks that were being dumped by my school (like 10+) and i wanted to try and workout the communications to the touchpad (synaptics t1004 chip) i have located 5 volt, gnd, data, and what appears to be pwron (for adb) i am nearly certain that this is ADB and not PS2 communications http://en.wikipedia.org/wiki/Apple_Desktop_Bus my goal is to at minimum be able to get X,Y data and the like THANKS