name: HT82K19 function: Multimedia Keyboard Encoder package: DIP40,40 manufacturer: Holtek +--()--+ PB5(R5) | 1 40| PC6(R6) PB4(R4) | 2 39| PB7(R7) PA3(C3) | 3 38| PA4(C4) PA2(C2) | 4 37| PA5(C5) PA1(C1) | 5 36| PA6(C6) PA0(C0) | 6 35| PA7(C7) PB3(R3) | 7 34| OSC2 PB2(R2) | 8 33| OSC1 PB1(R1) | 9 32| VDD PB0(R0) |10 31| RESB PD7(R15) |11 30| TMR1(LED6) PD6(R14) |12 29| PD3(R11) PD5(R13) |13 28| PD2(R10) PD4((R12) |14 27| PD1(R9) VSS |15 26| PD0(R8) INTB |16 25| PC7(R17) TMR0(LED5) |17 24| PC6(R16) PC0(DATA) |18 23| PC5(LED4) PC1(CLK) |19 22| PC4(LED3) PC2(LED1) |20 21| PC3(LED2) +------+ This pinout came from the Chipdir: http://www.chipdir.org/