Solder Side | Parts Side
________________________________|___________________________________
1P Up | A | 1 | 1P Down
----------------------------|---|---|-------------------------------
1P Left | B | 2 | 1P Right
----------------------------|---|---|-------------------------------
1P Button 1 | C | 3 | 1P Button 2
----------------------------|---|---|-------------------------------
2P Up | D | 4 | 2P Down
----------------------------|---|---|-------------------------------
2P Left | E | 5 | 2P Right
----------------------------|---|---|-------------------------------
2P Button 1 | F | 6 | 2P Button 2
----------------------------|---|---|-------------------------------
Coin Switch # 1 | H | 7 | Coin Switch # 2
----------------------------|---|---|-------------------------------
GND | J | 8 | GND
----------------------------|---|---|-------------------------------
GND | K | 9 | GND
----------------------------|---|---|-------------------------------
+5 | L | 10| +5
----------------------------|---|---|-------------------------------
+12 | M | 11| --
----------------------------|---|---|-------------------------------
-- | N | 12| +12
----------------------------|---|---|-------------------------------
+5 | P | 13| +5
----------------------------|---|---|-------------------------------
GND | R | 14| GND
----------------------------|---|---|-------------------------------
GND | S | 15| GND
----------------------------|---|---|-------------------------------
1P Start | T | 16| 2P Start
----------------------------|---|---|-------------------------------
Test Switch | U | 17| Service Switch
----------------------------|---|---|-------------------------------
Coin Counter # 1 | V | 18| Coin Counter # 2
----------------------------|---|---|-------------------------------
Speaker (+) | W | 19| Speaker (-)
----------------------------|---|---|-------------------------------
-- | X | 20| Video Red
----------------------------|---|---|-------------------------------
Video Green | Y | 21| Video Blue
----------------------------|---|---|-------------------------------
Video GND | Z | 22| Video Sync
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