44 Pin Wiring List for P20:
COMPONENT SIDE | SOLDER SIDE
--------------------------------|-----------------------------------
+ 5 V Return | A | 1 | + 5 V Return
----------------------------|---|---|-------------------------------
+ 5 V | B | 2 | + 5 V
----------------------------|---|---|-------------------------------
1P Tball Horiz. Clock | C | 3 | + 22 V DC (Note 1)
----------------------------|---|---|-------------------------------
1P Tball Vert. Clock | D | 4 | - 22 V DC (Note 1)
----------------------------|---|---|-------------------------------
+10.3 V DC (Note 1) | E | 5 | 1P Tball Horiz. Dir.
----------------------------|---|---|-------------------------------
2P Tball Horiz. Clock | F | 6 | 1P Tball Vert. Dir.
----------------------------|---|---|-------------------------------
2P Tball Vert. Clock | H | 7 | 2P Tball Vert. Dir.
----------------------------|---|---|-------------------------------
2P DOWN (Note 2) | J | 8 | 2P Tball Horiz. Dir.
----------------------------|---|---|-------------------------------
2P RIGHT (Note 2) | K | 9 | 1P LEFT (Note 2)
----------------------------|---|---|-------------------------------
2P LEFT (Note 2) | L | 10| 1P RIGHT (Note 2)
----------------------------|---|---|-------------------------------
1P DOWN (Note 2) | M | 11| 1P UP (Note 2)
----------------------------|---|---|-------------------------------
1P Fire Button | N | 12| 2P UP (Note 2)
----------------------------|---|---|-------------------------------
2P Start | P | 13| 2P FIRE (Note 2)
----------------------------|---|---|-------------------------------
Tilt Switch | R | 14| 1P Start
----------------------------|---|---|-------------------------------
Coin Aux. | S | 15| N.C.
----------------------------|---|---|-------------------------------
Left Coin Slot | T | 16| Cocktail (Note 3)
----------------------------|---|---|-------------------------------
Right Coin Slot | U | 17| Self Test
----------------------------|---|---|-------------------------------
RESET | V | 18| +10.3 V DC (Note 1)
----------------------------|---|---|-------------------------------
-22 V DC (Note 1) | W | 19| N.C.
----------------------------|---|---|-------------------------------
+22 V DC (Note 1) | X | 20| N.C.
----------------------------|---|---|-------------------------------
+ 5 V | Y | 21| 5V Sense
----------------------------|---|---|-------------------------------
GND | Z | 22| 5V Sense RET
--------------------------------------------------------------------
Notes:
1 - This input voltage is unregulated.
2 - Joystick inputs for alternate player control.
3 - Ground for Cocktail type cabinet, unused in Upright games.
24 Pin Wiring List for P19:
COMPONENT SIDE | SOLDER SIDED
--------------------------------|-----------------------------------
Right Coin Counter | A | 1 | Audio 2 Out (Note 4)
----------------------------|---|---|-------------------------------
Audio Ground | B | 2 | Audio 1 Out (Note 4)
----------------------------|---|---|-------------------------------
Left Coin Counter | C | 3 | 1P Start LED (Note 5)
----------------------------|---|---|-------------------------------
N.C. | D | 4 | 2P Start LED (Note5)
----------------------------|---|---|-------------------------------
N.C. | E | 5 | N.C.
----------------------------|---|---|-------------------------------
N.C. | F | 6 | Horiz Sync(+)
----------------------------|---|---|-------------------------------
Video Return | H | 7 | Composite Sync (Inverted)
----------------------------|---|---|-------------------------------
N.C. | J | 8 | Vert Sync(+)
----------------------------|---|---|-------------------------------
GND | K | 9 | N.C.
----------------------------|---|---|-------------------------------
GND | L | 10| Video Blue
----------------------------|---|---|-------------------------------
GND | M | 11| Video Green
----------------------------|---|---|-------------------------------
Ground (Coin Door) | N | 12| Video Red
--------------------------------------------------------------------
Notes:
4 - Both Audio Outputs are only used with original Atari
Audio/Regulator II boards. Use only one output for use
with a single external audio amplifier.
5 - Connect to Cathode of Start Button LEDs, Anodes to +5
Volts through a 330-ohm current limiting resistor.