TOP GUNNER
  COMP                               CKT
  ----                               ---
  1 GND                               A +12V
  2 GND                               B SP+
  3                                   C 
  4 1 RIGHT                           D +5V
  5 COIN                              E 2 RIGHT
  6 2 LEFT                            F COIN
  7 2 DOWN                            H 1 LEFT
  8 1 START                           J 1 DOWN
  9 2 UP                              K COIN
 10 1 BOMB                            L 1 UP
 11 SYNC                              M 2 BOMB
 12 2 FIRE                            N 2 START
 13                                   P 1 FIRE
 14 VID RED                           R
 15 VID BL                            S VID GN
 16 GND                               T +5V
 17 GND                               U +5V
 18 GND                               V +5V