System Fairchild cartridge pinout
1 GND 2 GND 3 D0 4 D1 5 /INTREQ 6 ROMC0 7 ROMC1 8 ROMC2 9 D2 10 ROMC3 11 D3 12 ROMC4 13 PHI 14 D4 15 WRITE 16 D5 17 D6 18 D7 19 +5V 20 +5V 21 Not Connected 22 +12V