Frontline pinout: "G" "T" 1 GND A GND 1 GND A GND 2 VIDEO RED B VIDEO GND 18 +5 3 VIDEO GREEN C VIDEO BLUE REST ARE N/C 4 COMPOSITE SYNC D N/C 5 + AUDIO E AUDIO GND 6 N/C F N/C "H" 7 MRST H N/C 1 GND 8 COIN SW RIGHT J COIN SW LEFT 2 GND 9 TOP COIN COUNTER K BOTTOM COIN COUNTER 3 N/C 10 RIGHT COIN LOCKOUT L LEFT COIN LOCKOUT 4 N/C 11 SERVICE SW M SLAM 5 +5 12 1 PLAYER SELECT N 2 PLAYER SELECT 6 +5 13 JOY UP P N/C 7 N/C 14 JOY DOWN R N/C 8 N/C 15 JOY RIGHT S N/C 9 +12 16 JOY LEFT T N/C 10 KEY 17 GUN UP U N/C 11 +12 18 GUN DOWN V N/C 12 +12 19 GUN RIGHT W N/C 20 GUN LEFT X N/C 21 FIRE Y N/C 22 JUMP Z N/C