NEO GEO (2,4, AND 6 SLOT)
FM: Kevin_Eshbach@bigfoot.com

Pinouts
---------------------------------------------------------------
         SOLDER SIDE           |          PARTS SIDE
_______________________________|_______________________________
          Ground           | A | 1 |        Ground
---------------------------|---|---|---------------------------
          Ground           | B | 2 |        Ground
---------------------------|---|---|---------------------------
           +5V             | C | 3 |          +5V
---------------------------|---|---|---------------------------
           +5V             | D | 4 |          +5V
---------------------------|---|---|---------------------------
           -5V (Not Used)  | E | 5 |          -5V (Not Used)
---------------------------|---|---|---------------------------
           +12V            | F | 6 |          +12V
---------------------------|---|---|---------------------------
           KEY             | H | 7 |          KEY
---------------------------|---|---|---------------------------
        Coin Meter 2       | J | 8 |       Coin Meter 1
---------------------------|---|---|---------------------------
         Lockout 2         | K | 9 |        Lockout 1
---------------------------|---|---|---------------------------
       Speaker(+) Left *   | L | 10|     Speaker(+) Right *
---------------------------|---|---|---------------------------
         Test Switch       | M | 11|       Audio Line Out **
---------------------------|---|---|---------------------------
        Video Green        | N | 12|        Video Red
---------------------------|---|---|---------------------------
        Video Sync         | P | 13|        Video Blue
---------------------------|---|---|---------------------------
      Service Switch       | R | 14|       Video Ground
---------------------------|---|---|---------------------------
         Coin 4            | S | 15|         Coin 3
---------------------------|---|---|---------------------------
         Coin 2            | T | 16|         Coin 1
---------------------------|---|---|---------------------------
      2 Player Start       | U | 17|      1 Player Start
---------------------------|---|---|---------------------------
       Player 2 Up         | V | 18|        Player 1 Up
---------------------------|---|---|---------------------------
      Player 2 Down        | W | 19|       Player 1 Down
---------------------------|---|---|---------------------------
      Player 2 Left        | X | 20|       Player 1 Left
---------------------------|---|---|---------------------------
     Player 2 Right        | Y | 21|      Player 1 Right
---------------------------|---|---|---------------------------
    Player 2 Button A      | Z | 22|     Player 1 Button A
---------------------------|---|---|---------------------------
    Player 2 Button B      | a | 23|     Player 1 Button B
---------------------------|---|---|---------------------------
    Player 2 Button C      | b | 24|     Player 1 Button C
---------------------------|---|---|---------------------------
    Player 2 Button D      | c | 25|     Player 1 Button D
---------------------------|---|---|---------------------------
       Select Down         | d | 26|         Select Up
---------------------------|---|---|---------------------------
        Ground             | e | 27|           Ground
---------------------------|---|---|---------------------------
        Ground             | f | 28|           Ground
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* Connect Speaker (-) to one of the ground pins to complete the circuit.
** Is this used for anything?