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JAMMA
JAMMA=Japanese Arcade Machine Manufacturers Association
An old group trying to set standards for board pinouts (at arcade machines).
This was designed to make board changes easy, just take out the old
game and plug in the new. Unfortunately games have evolved, and the Jamma
standard is no longer up to the job as it can`t handle more than 4 buttons or
two players. Also replacing a board from a different manufacturer meant
readjusting the picture on the monitor as it would not be centred in the same
position.
28 PIN UNKNOWN CONNECTOR on the arcade machine
Sold side
| Pin |
Description |
| A |
Ground |
| B |
Ground |
| C |
+5V |
| D |
+5V |
| E |
-5V |
| F |
+12V |
| H |
Key (no connection) |
| J |
Meter 2 |
| K |
Lockout 2 |
| L |
Speaker - |
| M |
Audio Ground |
| N |
Video Green |
| P |
Video Sync |
| R |
Service Switch |
| S |
Tilt Switch "Pinball Slam" |
| T |
Coin 2 |
| U |
2 Player start |
| V |
Player 2 Up |
| W |
Player 2 Down |
| X |
Player 2 Left |
| Y |
Player 2 Right |
| Z |
Player 2 Button 1 |
| Aa |
Player 2 Button 2 |
| Ab |
Player 2 Button 3 |
| Ac |
(Player 2 Button 4) |
| Ad |
Not used |
| Ae |
Ground |
| Af |
Ground |
Component side
| Pin |
Description |
| 1 |
Ground |
| 2 |
Ground |
| 3 |
+5V |
| 4 |
+5V |
| 5 |
-5V |
| 6 |
+12V |
| 7 |
Key (no connection) |
| 8 |
Meter 1 |
| 9 |
Lockout 1 |
| 10 |
Speaker + |
| 11 |
Audio + |
| 12 |
Video Red |
| 13 |
Video Blue |
| 14 |
Video Ground |
| 15 |
Test Switch |
| 16 |
Coin 1 |
| 17 |
1 Player start |
| 18 |
Player 1 Up |
| 19 |
Player 1 Down |
| 20 |
Player 1 Left |
| 21 |
Player 1 Right |
| 22 |
Player 1 Button 1 |
| 23 |
Player 1 Button 2 |
| 24 |
Player 1 Button 3 |
| 25 |
(Player 1 Button 4) |
| 26 |
Not used |
| 27 |
Ground |
| 28 |
Ground |
Note: All signals are active low.
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Идея проекта(C)Anton Morozov, Kiev, Ukraine, 1999-2018, security2001@mail.ru
