Pinout: C9 Games: 1942 PCB Pinout Solder Side/Parts Side ------------------------------------------------------------- Ground | A | 1 | Ground ------------------------------------------------------------ + 5 V | B | 2 | + 5 V ------------------------------------------------------------- + 1 2 V | C | 3 | + 1 2 V ------------------------------------------------------------- | D | 4 | ------------------------------------------------------------- Speaker - | E | 5 | Speaker - ------------------------------------------------------------- Speaker + | F | 6 | Speaker + ------------------------------------------------------------- Coin Counter - | H | 7 | Coin Counter + ------------------------------------------------------------- -----KEY----- | J | 8 | -----KEY------- ------------------------------------------------------------- P 1 shot | K | 9 | P 1 up ------------------------------------------------------------- P 1 down | L | 10 | P 1 left ------------------------------------------------------------- P 1 right | M | 11 | Ground ------------------------------------------------------------- P 2 shot | N | 12 | P 2 up ------------------------------------------------------------- P 2 down | P | 13 | P 2 left ------------------------------------------------------------- P 2 right | R | 14 | Ground ------------------------------------------------------------- P 2 start | S | 15 | ------------------------------------------------------------- P 1 start | T | 16 | ------------------------------------------------------------- Coin | U | 17 | ------------------------------------------------------------- Service | V | 18 | ------------------------------------------------------------- | W | 19 | P 1 loop 2 ------------------------------------------------------------- | X | 20 | P 2 loop 2 ------------------------------------------------------------- | Y | 21 | Ground ------------------------------------------------------------- Sync (CMP) | Z | 22 | Video RED ------------------------------------------------------------- Video GREEN | a | 23 | Video BLUE ------------------------------------------------------------- | b | 24 | ------------------------------------------------------------- | c | 25 | ------------------------------------------------------------- | d | 26 | ------------------------------------------------------------- + 5 V | e | 27 | + 5 V ------------------------------------------------------------- Ground | f | 28 | Ground -------------------------------------------------------------