A normal (non-TMS) 2716 versus a TMS2716 pins out like this: <----- normal 2716 -----><---- TMS2716 pin redefinitions ----> +-----+ +-----+ A7 |1 +--+ 24| VCC <--- Vcc/PE (PE is Program Enable) A6 |2 23| A8 A5 |3 22| A9 A4 |4 21| VPP <--- Vbb (-5 volts) A3 |5 20| /OE <--- A10 A2 |6 19| A10 <--- Vdd (+12 volts) A1 |7 2716 18| /CE <--- S/PGM (chip select/program) A0 |8 17| D7 D0 |9 16| D6 D1 |10 15| D5 D2 |11 14| D4 GND |12 13| D3 +--------------+