SNK                          A.S.O
-----------------------------------------------------------
                        +5V | A | 1 | +5V
                       Coin | B | 2 |
                       Coin | C | 3 |
                   1P Start | D | 4 | 2P Start
                   1P Up    | E | 5 | 1P Down
                   1P Left  | F | 6 | 1P Right
                            | H | 7 | 1P Fire
                   1P Bomb  | J | 8 |
                   2P Up    | K | 9 | 2P Down 
                   2P Left  | L | 10| 2P Right
                            | M | 11| 2P Fire 
                   2P Bomb  | N | 12|
                        GND | P | 13| GND
                        GND | R | 14| GND
                        -5V | S | 15| -5V
                            | T | 16|
                      Csync | U | 17| Blue
                      Green | V | 18| Red
                    Speaker | W | 19|
                       +12V | X | 20| +12V 
                        GND | Y | 21| GND
                        GND | Z | 22| GND

Regards, John.

* John Keay                               ! TMS320C80 design       *
* work: keay@tiuk.ti.com                  ! Texas Instruments Ltd. *
* home: john@keay.demon.co.uk             ! Northampton, U.K.      *
* Disclaimer:  All opinions expressed herein are personal. etc etc *