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                               POLE POSITION II
                          ==========================
                     by: Some Guy I Don't Remember His Name

Video board, 30 pins, 15 per side, numbered side is back of board, letters
are on component side.  Items in parenthesis aren't listed on schematic:

	 1  Ground				A  Ground
	 2  +5 volts				B  +5 volts
	 3  (ground)				C  (ground)
				(keyway)
	 4  (ground)				D  (ground)
	 5  (ground)				E  (ground)
	 6  (ground)				F  (ground)
	 7  (ground)				H  (ground)
	 8  (ground)				J  (ground)
	 9  Red					K  (ground)
	10  Green				L  (ground)
	11  Composite sync (inverted)		M  (ground)
	12  Blue				N  (ground)
	13  Video return			P  (ground)
	14  + sense				R  (+5 volts)  
	15  - sense				S  (ground)

CPU board, 44 pins, 22 per side, numbered side is back of board, letters
are on component side.  Items in parenthesis aren't listed on schematic:

 1  Ground					A  Ground
 2  +5 volts					B  +5 volts
 3  (ground)					C  (ground)
				(keyway)
 4  Ground for shifter				D  Ground (coin door 1)
 5  Ground for brake				E  Ground (utility panel 4)
 6  Brake					F  Gas pedal wiper
 7  Start 0					H  Steering 2 (steering pin 1)
 8  Steering 1 (steering pin 4)			J  Right coin counter 2 (utility panel 6)
 9  Left coin counter 1 (utility panel 7)	K  Test switch (utility panel 5)
10  Service switch (utility panel 9)		L  Coin 2 (coin door 2)
11  Coin 1 (coin door 3)			M  Start 1
12  Shifter					N  (ground)
13  (vol. gnd)					P  vol. gnd for gas
14  (vol. vcc)					R  vol. vcc for gas
15  Sound 2+  					S  (ground)
16  Sound 4+					T  Sound 1+
17  (ground)					U  Audio ground for channels 1 & 3
18  Sound 3+					V  Audio ground for channels 2 & 4
19  Sound 1-					W  Sound 4-
20  Sound 3-					X  Sound 2-
21  + sense					Y  +5 for steering (steering pin 2)
22  - sense					Z  Gnd for steering (steering pin 3)

For upright game, connect the following on the CPU board:

	18 to T and 19 to 20 to strap sound outputs 1 and 3 together
	15 to 16 and X to W to strap sound outputs 2 and 4 together
	7 to M for automatic game start (a start switch could go here)
	5 to 6 to account for lack of brake pedal

Audio outputs need to go to an amplifier (won't drive a speaker directly).
Gas pedal is a 5K pot.

I've never tried doing this before and don't know if you also need
power/audio board hookups or not.  If you are using a switching power
supply instead (REAL good idea) you will need another way to drive the
speakers.  It is also assumed you are trying for an upright cabinet and
not a sitdown.  For all I know, you might be trying to make the worlds first
COCKTAIL Pole Position---if so, mount a couple fans!!

 


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