CPU BOARD         
J1 - Power Input (12 pins, .156")
      1 - GND
      2 - GND
      3 - +5V
      4 - +5V
      5 - Key
      6 - Reset Out (unused)
      7 - GND
      8 - +12V (unused - see note on J6)
      9 - +5V
     10 - +5V
     11 - GND
     12 - GND
J2 - Inputs IP00 through IP17 (19 pins, .100")
      1 - P1 coin
      2 - P2 coin
      3 - N/C
      4 - N/C
      5 - Tilt
      6 - Test
      7 - Service
      8 - N/C
      9 - GND
     10 - P1 Up
     11 - P1 Right
     12 - P1 Down
     13 - P1 Left
     14 - Key
     15 - P1 Punch
     16 - P1 Jump/Start
     17 - N/C
     18 - N/C
     19 - GND
J3 - Inputs IP20-IP27, Outputs OP60-OP67, Coin Meter (23 pins, .100")
      1 - P2 Up
      2 - P2 Right
      3 - P2 Down
      4 - P2 Left
      5 - P2 Punch
      6 - P2 Jump/Start
      7 - N/C
      8 - N/C
      9 - GND
     10 - Strobe/SIRQ (to SOUNDS GOOD, J1, pin 2)
     11 - Sound 0 (to SOUNDS GOOD, J1, pin 4)
     12 - Sound 1 (to SOUNDS GOOD, J1, pin 3)
     13 - Sound 2 (to SOUNDS GOOD, J1, pin 9)
     14 - Sound 3 (to SOUNDS GOOD, J1, pin 8)
     15 - Sound Reset (to SOUNDS GOOD, J2, pin 9)
     16 - N/C
     17 - N/C
     18 - GND
     19 - Key
     20 - Meter Return (to GND on power supply)
     21 - Coin Meter
     22 - GND
     23 - GND
J4 - Inputs IP40-IP47, Outputs OP51-OP57 (16 pin, .100")
      1 - P3 Up
      2 - P3 Right
      3 - P3 Down
      4 - P3 Left
      5 - P3 Punch
      6 - P3 Jump/Start
      7 - N/C
      8 - Key
      9 - Stat 0 (to SOUNDS GOOD, J1, pin 6)
     10 - GND
     11 - N/C
     12 - N/C
     13 - N/C
     14 - N/C
     15 - N/C
     16 - N/C
J5 - Video outputs (9 pins, .100")
      1 - Red
      2 - GND
      3 - Green
      4 - GND
      5 - Blue
      6 - GND
      7 - Key
      8 - Horizontal sync
      9 - Vertical sync
J6 - Aux Power Input (11 pins, .100")
      1 - GND
      2 - GND
      3 - +5V
      4 - +12V
      5 - Key
      6 - Reset Out (unused)
      7 - Reset Out (unused)
      8 - +12V
      9 - +5V
     10 - GND
     11 - GND
SOUNDS GOOD BOARD
J1 - Sound Selection/Status (9 pins, .100")
      1 - Spare (unused)
      2 - Strobe/SIRQ (from CPU, J3, pin 10)
      3 - Sound 1 (from CPU, J3, pin 12)
      4 - Sound 0 (from CPU, J3, pin 11)
      5 - STAT1 (unused)
      6 - STAT0 (from CPU, J4, pin 9)
      7 - Key
      8 - Sound 3 (from CPU, J3, pin 14)
      9 - Sound 2 (from CPU, J3, pin 13)
J2 - Power Input (12 pins, .156")
      1 - A GND
      2 - A GND
      3 - +5V
      4 - +5V
      5 - +12V
      6 - +12V
      7 - E GND (unused)
      8 - Key
      9 - Sound Reset (from CPU, J3, pin 15)
     10 - Sound Reset
     11 - L GND
     12 - L GND
J3 - Audio Output (12 pins, .100")
   - Volume pot "A" and "B" signals go to the two "sides" of the pot.
     The "wiper" goes in the "middle".
      1 - Volume pot wiper (to POT)
      2 - Left audio out (to DUAL POWER AMP, J1, pin 2)
      3 - Right audio out (to DUAL POWER AMP, J1, pin 3)
      4 - A GND (to DUAL POWER AMP, J1, pin 3)
      5 - A GND
      6 - Audio out (unused)
      7 - Audio out (unused)
      8 - A GND
      9 - Key
     10 - Volume pot A (to POT)
     11 - A GND
     12 - Volume pot B (to POT)
J1 - Audio Input (8 pins, .100")
      1 - N/C
      2 - Left audio
      3 - Left shield (from SOUNDS GOOD, J3, pin 4)
      4 - Key
      5 - GND
      6 - Right audio
      7 - Right shield (unused)
      8 - +12V
J2 - Speaker Output (6 pins, .100")
      1 - Right speaker +ve
      2 - Right speaker -ve
      3 - Key
      4 - Left speaker +ve
      5 - N/C
      6 - Left speaker -ve
DUAL POWER AMP WITH MIXER
J1 - Audio Input (11 pins, .100")
      1 - L2 shield (unused)
      2 - L2 audio (corresponds to DUAL POWER AMP, J1, pin 2)
      3 - L1 audio (unused)
      4 - L1 shield (corresponds to DUAL POWER AMP, J1, pin 3)
      5 - Key
      6 - GND
      7 - R2 shield (unused)
      8 - R2 audio (corresponds to DUAL POWER AMP, J1, pin 6)
      9 - R1 audio (unused)
     10 - R1 shield (unused)
     11 - +12V

J2 - Speaker Output (6 pins, .100")
      1 - Right speaker +ve
      2 - Right speaker -ve
      3 - Key
      4 - Left speaker +ve
      5 - N/C
      6 - Left speaker -ve