google?? not to be rude... but a lot of threads requesting things are here solely because the guy who made it cant do a google search..
I don't know about alps, but synaptics use a standard PS2 interface. I havea keyboard with a touchpad instead of a numpad. I just put a PS2 controller in the keyboard, and use the original USB cableto the computer.
thanx really i know how to make an ps2 interfacing but i want to make a serial interfacing and i search alot in google and i did not find any thig