Understanding The JAMMA PCB And Edge Connector Pinout

First, here's a little historical past behind the which means of the acronym, JAMMA.

Again at the hours of darkness ages of the Golden Period of colonnade video video games (1984 and earlier), sport producers operated in unique little domains the place they designed

sport elements

in a approach that superlative served their very own pursuits.

Consequently, they every had their very own proprietary circuit boards, energy provides, and wiring harnesses. There was primarily no fungibility of elements between one producer's sport closet and a sport closet made by another person.

Because of the Japanese, round 1985, all of that exclusivity was good laid to relaxation. The Japan Amusement Equipment Producers Affiliation (JAMMA) created some business requirements, importantly for the design of sport written circuit boards (PCBs). And, issues evermore modified.

A very powerful and important of those new requirements was the PCB customary pinout. Any sport PCB complying thereupon pinout customary is what we now name a JAMMA board. You may see the JAMMA

emblem sealed

near the pinout part of a JAMMA board. Nearly all JAMMA boards sport that emblem.

The wiring that connects the sport's elements - monitor, energy provide, direction panel, speaker, so on. - to the PCB is named a JAMMA wiring harness. The wiring harness 56-pin edge connective seating area onto the PCB's pinout fingers.

There are lots of JAMMA phrases that we've come to listen to and use often - JAMMA board, JAMMA harness, JAMMA edge connective, JAMMA closet, so forth. On the root of their which means is nomatter greater than the idea of PCB fungibility between closets of totally different producers.

And, it's the JAMMA customary PCB pinout (charted under) that has made all of it doable.

The next JAMMA pinout chart is in the mai a map of the JAMMA wiring harness 56-pin edge connective. When aright sitting onto the PCB, the connectives of the sting connective will align with the pinout fingers of the PCB, and your sport will play.

Once you tire of a sport, you'll be able to plug-and-play the JAMMA PCB to your later favourite sport. Plug-and-play simply means to disconnect the sting connective from one PCB, and plug it onto one other PCB.

And, that scheme of plug-and-play can proceed on and on, as a result of there are actually 1,000's of JAMMA sport PCBs you could play in your JAMMA closet. Thanks, Japan.

JAMMA PINOUT CHART

Solder Aspect - Alpha Characters - 28 Pins - A-Z, a-f

The solder aspect is the bottom aspect of the PCB. It's the aspect the place the soldered connections of components are au naturel to view. Few, if any, components are attack the solder aspect. The solder aspect pinout is recognized with alpha characters.

Elements Aspect - Numeric Characters - 28 Pins - 1-28

The components aspect is the highest aspect of the PCB. It's the aspect the place the components are set. The components aspect pinout is recognized with numeric characters.

Often, the PCB is written and the sting connective is decorated with the alpha and numeric characters.

GROUND - A, 1

GROUND - B, 2

+5VDC - C, 3

+5VDC - D, 4

-5VDC - E, 5

+12VDC - F, 6

KEY SLOT - H, 7

COIN COUNTER #2 - J

COIN COUNTER #1 - 8

LOCK OUT COIL #2 - Okay

LOCK OUT COIL #1 - 9

SPEAKER (-) - L

SPEAKER (+) - 10

N/C - M

N/C - 11

VIDEO GREEN - N

VIDEO RED - 12

VIDEO SYNC - P

VIDEO BLUE - 13

SERVICE SWITCH - R

VIDEO GROUND - 14

TILT (SLAM) SWITCH - S

TEST SWITCH - 15

COIN SWITCH #2 - T

COIN SWITCH #1 - 16

PLAYER 2 - START - U

PLAYER 1 - START - 17

PLAYER 2 - UP - V

PLAYER 1 - UP - 18

PLAYER 2 - DOWN - W

PLAYER 1 - DOWN - 19

PLAYER 2 - LEFT - X

PLAYER 1 - LEFT - 20

PLAYER 2 - RIGHT - Y

PLAYER 1 - RIGHT - 21

PLAYER 2 - BUTTON 1 - Z

PLAYER 1 - BUTTON 1 - 22

PLAYER 2 - BUTTON 2 - a

PLAYER 1 - BUTTON 2 - 23

PLAYER 2 - BUTTON 3 - b

PLAYER 1 - BUTTON 3 - 24

N/C - c

N/C - 25

N/C - d

N/C - 26

GROUND - e

GROUND - 27

GROUND -f

GROUND - 28

Understanding the JAMMA Pinout Chart:

N/C

- No connection.

Key Slot

- A keyed slot which aligns with a leave-out inside the pinout part of the PCB.

This

security function

is supplied to guarantee that the Energy Part seating area on the right finish of the pinout part. If the sting connective is reversed, and the Energy Part is sitting on the reverse or mistaken finish, irreparable broken can happen to the PCB.

If the important matter has been faraway from the sting connective, then mark the connective as to the "Elements Aspect" to assist guarantee right seating.

Energy Part

- Pins A-F, 1-6, e, f, 27, 28

Video Part

- Pins N, P, 13-15

Coin Part

- Pins J, Okay, T, 8, 9, 16

Controller (Joystick) Part

- Pins V-Y, 18-21

Pushbutton Change Part

- Pins Z-B, 22-24