Midway 4-Player 25" Dedicated Video Game User Manual
Page 91
Wiring 5-3
Wires That Aren’t Part of Main JAMMA Harness
Function
Wire*
Aux Adptr, P1-
Function
Wire*
SIO Bd, P23-
Digital Ground
Blk
1
Digital Ground
Blk
1
Output Bit 0
Orn-Gry
2
Coin 3
Blk- Orn
2
Output Bit 1
Yel- Gry
3
+5 Volts
Red
3
Output Bit 2
Blu- Gry
4
+12 Volts
Orn
4
Output Bit 3
Vio- Gry
5
Unused
Key
5
Unused
NC
6
Coin 4
Blk-Yel
6
Unused
NC
7
Dollar Bill
Blk-Wht
7
Unused
NC
8
Volume Down
Orn-Red
8
Unused
NC
9
Volume Up
Orn-Grn
9
Unused
NC
10
Unused
NC
10
Unused
NC
11
Unused
NC
11
Unused
NC
12
Function
Wire Color*
SIO Bd, P3-
Unused
NC
13
+12 Volts
Orn
1
Unused
NC
14
Digital Ground
Blk
2
Digital Ground
Blk
15
Digital Ground
Blk
3
--
--
--
+5 Volts
Red
4
*Abbreviations: Bd = Board; NC = Not Connected; Blk = Black; Brn = Brown; Orn = Orange;
Yel = Yellow; Grn = Green; Blu = Blue; Vio = Violet; Gry = Gray; Wht = White.
D.C. Power Source Voltage Limits
Function
Range Limits
ID
Function
Range Limits
ID
Digital Circuits
+4.90V to +5.10V
+5V
Audio, Lights
-4.75V to -5.25V
-5V
Audio, DBV
+11.5V to +12.5V
+12V
NOTE: +5V is adjustable at the Power Supply
Harness Connector Prefixes
Prefix
Connector Location
Example
1
CPU Board
1P1
2
--
--
3
Sound / Interface (SIO) Board
3P1
4
Fluorescent Lamp
4P1
5
Power Supply
5P1
6
Video Monitor
6P1
7
Video Board
7P1
8
Coin Door Area
8P1
9
I40 Joystick Multiplexer Board
9P1
10
Auxiliary Output Adapter Bd
10P1
11
Cabinet
11P1
12
Hard Drive
12P1
13
Fans
13P1
14
Joysticks
14P1
15
Speakers
15P1
16
--
16P1
17
--
17P1
NOTICE: Look for the connector prefix on wiring diagrams. The prefix shows you
where you’ll find the connector.