RED ALERT (GDI, licensed from Irem)

  COMP SIDE                           CKT SIDE
  1   GND                             2   GND
  3   GND                             4   GND
  5   -5V                             6   -5V
  7   CTR                             8
  9   SHOOTER LEFT                    10  SHOOTER LEFT
  11  SHOOTER RIGHT                   12  SHOOTER RIGHT
  13  FIRE                            14  FIRE
  15  2 START                         16  1 START
  17  V SYNC                          18  COMP SYNC
  19                                  20  H SYNC
  21  +12V                            22  +12V
  23  +12V                            24  +12V
  25  SP                              26  SP
  27                                  28
  29  VID RED                         30  VID GN
  31  VID BL                          32
  33                                  34
  35                                  36
  37  COIN SVC                        38  COIN
  39  +5V                             40  +5V
  41  +5V                             42  +5V
  43  GND                             44  GND