The JAMMA Connector! Copied from the old page

This is a standard in the arcade industry. Starting sometime in the late eighties, the Japanese Amusement Machine Manufacturers Association set about making a standardized game interface. This would alleviate the silliness of rewiring a cab for every new game was installed. Most games required the same inputs: one or two 4-way joysticks, 1-4 buttons for each player, coin inputs, start button, etc.

With the JAMMA connector almost every game produced that didn't involve a deluxe cabinet (ie AfterBurner or Virtua Racing) any JAMMA game can be shoved into a cabinet which previously held any other JAMMA game. There are caveats - a lot of games deviated from the specification, and sometimes things like stereo sound, analogue controls and other features were added, or inputs moved around. As a rule though, power and video were locked in place so you'll rarely, if ever, damage one JAMMA board by plugging it in where another was used.

Roughly speaking there are only five things to connect to the game board through the wiring harness: player 1 & 2 controls, the monitor output, sound, power input and the coin-door's switches. These signals are usually grouped together. The diagram below shows the most common JAMMA pinout, and how these connections are made to the game board.

PARTS SIDE SOLDER SIDE
GND 1 A GND
GND 2 B GND
+5V 3 C +5V
-5V 4 D +5V
-5V 5 E -5V
+12V 6 F +12V
KEY 7 H KEY
COUNTER 1 8 J COUNTER 2
COIN LOCKOUT 1 9 K COIN LOCKOUT 2
SPEAKER + 10 L SPEAKER -
N/C 11 M N/C
RED 12 N GREEN
BLUE 13 P SYNC
GND 14 R SERVICE SW
TEST SW 15 S SLAM SW
COIN 1 16 T COIN 2
1P START 17 U 2P START
1P UP 18 V 2P UP
1P DOWN 19 W 2P DOWN
1P LEFT 20 X 2P LEFT
1P RIGHT 21 Y 2P RIGHT
1P FIRE 1 22 Z 2P FIRE 1
1P FIRE 2 23 z 2P FIRE 2
1P FIRE 3 24 b 2P FIRE 3
(Fire 4) N/C 25 c N/C (Fire 4)
N/C 26 d N/C
GND 27 e GND
GND 28 f GND

POWER
Video output
Coin door signals
Player 1 controls
Player 2 controls

 
 arcade/arcade_jammacon.txt · Last modified: 2019/08/27 20:45 (external edit)
 
Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Noncommercial-Share Alike 4.0 International
Recent changes RSS feed Driven by DokuWiki