J4 - 19 pin

1  - COIN 1
2  - COIN 2
3  - PLAYER 1 START
4  - PLAYER 2 START
5  - ?
6  - TILT
7  - SERVICE
8  - TEST
9  - COMMON (3,4,10,11,12,13,15,8)
10 - ? LEFT
11 - ? RIGHT
12 - ? UP
13 - ? DOWN
14 - 
15 - ? TAP
16 -
17 -
18 -
19 - COMMON (1,2,6,7)


J2 - 9 pin (MONITOR)

Video
1 - RED
2 - GND
3 - GREEN
4 - GND
5 - BLUE
6 - GND
7 - KEY
8 - /HBLNK
9 - /VBLNK

Power
2  - +5v
3  - +5v
4  - +5v
5  - +5v
6  - GND
7  - GND
10 - GND
14 - GND
15 - KEY
16 - V.BATT
17 - RESET
18 - +12v
20 - A.GND