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Connector - 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 oldgame and plug in the new. Unfortunately games have evolved, and the Jammastandard is no longer up to the job as it can`t handle more than 4 buttons ortwo players. Also replacing a board from a different manufacturer meantreadjusting the picture on the monitor as it would not be centred in the sameposition.

28 PIN UNKNOWN CONNECTOR on the arcade machine

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.

Source: HW-Book 2001-06-08
Last modified: 2007-06-27 14:22:50.0
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File last modified 2024-02-15 23:07:43