name: HT82M39A function: 3D PS/2 Mouse Controller package: DIP16,16 manufacturer: Holtek +--()--+ Z1 | 1 16| Y2 Z2 | 2 15| Y1 VDD | 3 14| X2 NC | 4 13| X1 VSS | 5 12| TEST OSCI | 6 11| LB CLK | 7 10| R0 DATA | 8 9| RB +------+ This pinout came from the Chipdir: http://www.chipdir.org/