Games: Choplifter, My hero, Pitfall, Regulus, Wonderboy.
PCB Pinout Parts Side/Solder Side
-------------------------------------------------------------
Ground | 1 | A | Ground
------------------------------------------------------------
Ground | 2 | B | Ground
-------------------------------------------------------------
+5 Volts | 3 | C | +5 Volts
-------------------------------------------------------------
+5 Volts | 4 | D | +5 Volts
-------------------------------------------------------------
Coin Meter 1 | 5 | E | Coin Meter 2
-------------------------------------------------------------
+12 Volts | 6 | F | +12 Volts
-------------------------------------------------------------
| 7 | H |
-------------------------------------------------------------
1P Button B | 8 | J | 2P Button B
-------------------------------------------------------------
1P Button A | 9 | K | 1P Button A
-------------------------------------------------------------
| 10 | L |
-------------------------------------------------------------
1P Down | 11 | M | 2P Down
-------------------------------------------------------------
1P Up | 12 | N | 2P Up
-------------------------------------------------------------
1P Right | 13 | P | 2P Right
-------------------------------------------------------------
1P Left | 14 | R | 2P Left
-------------------------------------------------------------
Coin 1 | 15 | S | 1P Start
-------------------------------------------------------------
Coin 2 | 16 | T | 2P Start
-------------------------------------------------------------
Test | 17 | U |
-------------------------------------------------------------
Service | 18 | V |
-------------------------------------------------------------
Speaker + | 19 | W | Speaker _
-------------------------------------------------------------
TV Red | 20 | X | TV Green
-------------------------------------------------------------
TV Blue | 21 | Y | TV Sync
-------------------------------------------------------------
TV Ground | 22 | Z | Ground
-------------------------------------------------------------
|