Midway 4-Player 25" Dedicated Video Game manual Function Wire Color SIO Bd, P3

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.

Wiring 5-3