Understanding the JAMMA PCB and Edge Connector Pinout
To begin with, here is a little history behind the significance of the abbreviation, JAMMA.
Back in obscurity times of the Golden Era of arcade computer games (1984 and prior), game producers worked in select little spaces where they planned game segments such that best served their own advantages.
Thusly, they each had their own restrictive circuit sheets, power supplies, and wiring bridles. There was basically no compatibility of segments between one producer’s down bureau and a game bureau made by another person.
On account of the Japanese, around 1985, the entirety of that restrictiveness was adequately let go. The Japan Amusement Machinery Manufacturers Association (JAMMA) made some industry guidelines, especially for the plan of game printed circuit sheets ChinaPCBcopy.com (PCBs). Also, things everlastingly changed.
The most significant and persuasive of these new principles was the PCB standard pinout. Any game PCB conforming to that pinout standard is the thing that we presently call a JAMMA board. You can see the JAMMA logo stepped near the pinout segment of a JAMMA board. Practically all JAMMA sheets sport that logo.
The wiring that interfaces the game’s parts – screen, power supply, control board, speaker, and so on – to the PCB is known as a JAMMA wiring outfit. The wiring outfit 56-pin edge connector seats onto the PCB’s pinout fingers.
There are numerous JAMMA expressions that we have come to hear and utilize habitually – JAMMA board, JAMMA outfit, JAMMA edge connector, JAMMA bureau, etc. At the base of their significance is simply the idea of PCB compatibility between cupboards of various producers.
Also, it is the JAMMA standard PCB pinout (outlined underneath) that has made it all conceivable.
The accompanying JAMMA pinout outline is essentially a guide of the JAMMA wiring outfit 56-pin edge connector. When appropriately situated onto the PCB, the connectors of the edge connector will line up with the pinout fingers of the PCB, and your game will play.
At the point when you tire of a game, you can fitting and-play the JAMMA PCB for your next most loved game. Attachment and-play just intends to unplug the edge connector from one PCB, and fitting it onto another PCB.
Furthermore, that cycle of attachment and-play can proceed endlessly, in light of the fact that there are currently 1,000’s of JAMMA game PCBs that you can play in your JAMMA bureau. Much obliged to you, Japan.
JAMMA PINOUT CHART
Bind Side – Alpha Characters – 28 Pins – A-Z, a-f
The weld side is the base side of the PCB. It is where the welded associations of parts are presented to see. Hardly any, parts are situated on the weld side. The bind side pinout is related to alpha characters.
Parts Side – Numeric Characters – 28 Pins – 1-28
The parts side is the top side of the PCB. It is where the parts are found. The parts side pinout is related to numeric characters.
Ordinarily, the PCB is printed and the edge connector is embellished 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 – K
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
Administration 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 association.
Key Slot – A keyed space which lines up with a forget about in the pinout part of the PCB.
This security include is given to guarantee that the Power Section seats at the right finish of the pinout segment. On the off chance that the edge connector is switched, and the Power Section is situated at the inverse or mistaken end, hopeless harmed can happen to the PCB.
On the off chance that the key has been eliminated from the edge connector, at that point mark the connector regarding the “Parts Side” to help guarantee right seating.
Force Section – Pins A-F, 1-6, e, f, 27, 28
Video Section – Pins N, P, 13-15
Coin Section – Pins J, K, T, 8, 9, 16
Regulator (Joystick) Section – Pins V-Y, 18-21
Pushbutton Switch Section – Pins Z-B, 22-24