JAMMA (Japan Amusement Machine and Marketing Association) is the standard 56-pin edge connector used in nearly all arcade game PCBs from 1985 to present. It carries power, video, audio, and player controls between the game board and cabinet.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | GND | Ground | GND |
| 2 | GND | Ground | GND |
| 3 | +5V | 5V power | PWR |
| 4 | +5V | 5V power | PWR |
| 5 | -5V | Negative 5V | PWR |
| 6 | +12V | 12V power | PWR |
| 7 | Key | No pin key | I/O |
| 8 | Coin Ctr 2 | Coin counter 2 | I/O |
| 9 | Coin Ctr 1 | Coin counter 1 | I/O |
| 10 | Coin Lockout 2 | Coin lockout 2 | I/O |
| 11 | Coin Lockout 1 | Coin lockout 1 | I/O |
| 12 | Speaker+ | Speaker positive audio | ADC |
| 13 | Speaker- | Speaker negative | ADC |
| 14 | NC | Not connected | I/O |
| 15 | Video Green | Green video 0.7V | ADC |
| 16 | Video Blue | Blue video 0.7V | ADC |
| 17 | Video Red | Red video 0.7V | ADC |
| 18 | Video Sync | Composite sync | BUS |
| 19 | Service Sw | Service switch | I/O |
| 20 | Tilt | Tilt sensor input | I/O |
| 21 | Coin Sw 2 | Coin switch 2 | I/O |
| 22 | Coin Sw 1 | Coin switch 1 | I/O |
| 23 | P2 Start | Player 2 start button | I/O |
| 24 | P1 Start | Player 1 start button | I/O |
| 25 | P1 Up | Player 1 joystick up | I/O |
| 26 | P1 Down | Player 1 joystick down | I/O |
| 27 | P1 Left | Player 1 joystick left | I/O |
| 28 | GND | Ground | GND |
JAMMA (Japan Amusement Machine and Marketing Association) is the standard 56-pin edge connector used in nearly all arcade game PCBs from 1985 to present. It carries power, video, audio, and player controls between the game board and cabinet.