Crackdown, Hot Rod, Gain Ground, Shinobi, Altered Beast, Golden Axe, Alex Kidd, Alien Syndrome,


           

          SEGA 28 pin input/output assignments (SEGA System 24)
          *****************************************************

              Component Side   Pin #     Solder Side
          -----------------------------------------------
                         GND   1   A     GND
                         GND   2   B     GND
                 +5 Volts DC   3   C     +5 Volts DC
                 +5 Volts DC   4   D     +5 Volts DC
                +12 Volts DC   5   E     +12 Volts DC
                Coin Meter 1   6   F     Coin Meter 2
                               7   H             
          Player 1  Switch A   8   J     Player 2  Switch A
          Player 1  Switch B   9   K     Player 2  Switch B         
          Player 1  Switch C   10  L     Player 2  Switch C
                               11  M             
              Player 1  Down   12  N     Player 2  Down
                Player 1  Up   13  P     Player 2  Up
             Player 1  Right   14  R     Player 2  Right
              Player 1  Left   15  S     Player 2  Left
                               16  T             
                               17  U             
                               18  V             
                               19  W             
             Coin Switch  1    20  X     Player 1  Start Switch
             Coin Switch  2    21  Y     Player 2  Start Switch
                Test Switch    22  Z             
             Service Switch    23  a             
                Speaker (+)    24  b     Speaker (-)
                Monitor Red    25  c     Monitor Green
               Monitor Blue    26  d     Composite Sync
                        GND    27  e     GND
                        GND    28  f     GND