Nihon Perfect Billiards

  CKT SIDE                                  PARTS SIDE
-----                                     -----
 A1  GND                                   B1  GND
 A2  GND                                   B2  GND
 A3  +5                                    B3  +5V
 A4  +5                                    B4  +5V
 A5  +12V                                  B5  +12V
 A6  Speaker +                             B6  Speaker -
 A7  Counter 1                             B7  Counter 2
 A8  1P Coin                               B8  2P Coin
 A9  1P Start                              B9  2P Start
A10  1P Up                                B10  2P Up
A11  1P Down                              B11  2P Down
A12  1P Left                              B12  2P Left
A13  1P Right                             B13  2P Right
A14  1P Shoot                             B14  2P Shoot
A15                                       B15  
A16  Red                                  B16  Blue
A17  Green                                B17  Sync
A18  GND                                  B18  GND