JAMMA connector pinout

#Computer#Buses and Slots

JAMMA=Japanese Arcade Machine Manufacturers Association

56 pin JAMMA special connector pin-out & layout56 pin JAMMA special connector  at the arcade gameAn 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.

Sold side

PinDescription
AGround
BGround
C+5V
D+5V
E-5V
F+12V
HKey (no connection)
JMeter 2
KLockout 2
LSpeaker -
MAudio Ground
NVideo Green
PVideo Sync
RService Switch
STilt Switch "Pinball Slam"
TCoin 2
U2 Player start
VPlayer 2 Up
WPlayer 2 Down
XPlayer 2 Left
YPlayer 2 Right
ZPlayer 2 Button 1
AaPlayer 2 Button 2
AbPlayer 2 Button 3
Ac(Player 2 Button 4)
AdNot used
AeGround
AfGround

Component side

PinDescription
1Ground
2Ground
3+5V
4+5V
5-5V
6+12V
7Key (no connection)
8Meter 1
9Lockout 1
10Speaker +
11Audio +
12Video Red
13Video Blue
14Video Ground
15Test Switch
16Coin 1
171 Player start
18Player 1 Up
19Player 1 Down
20Player 1 Left
21Player 1 Right
22Player 1 Button 1
23Player 1 Button 2
24Player 1 Button 3
25(Player 1 Button 4)
26Not used
27Ground
28Ground
Note: All signals are active low.

ISA bus pinout

MCA 16 bit bus pinout