name: HT82K28A function: Win98 Keyboard Encoder package: DIP40,40 manufacturer: Holtek +--()--+ OSC1 | 1 40| C1 VSS | 2 39| C0 VDD | 3 38| DATA VSS | 4 37| CLOCK IO0 | 5 36| R18 IO1 | 6 35| R17 C2 | 7 34| NC C3 | 8 33| R16 C4 | 9 32| CAP C5 |10 31| NUM C6 |11 30| SCRL C7 |12 29| R9 R10 |13 28| R8 R11 |14 27| R15 R12 |15 26| R14 R0 |16 25| NC R1 |17 24| R13 R2 |18 23| R7 R3 |19 22| R6 R4 |20 21| R5 +------+ This pinout came from the Chipdir: http://www.chipdir.org/