Donkey Kong, DKJr, DK3, Mario Bros, Popeye

A  - GND                1  - GND
B  - GND                2  - GND
C  - +5                 3  - +5
D  - +5                 4  - +5
E  - +12                5  - +12
F  - -5                 6  - -5
H  - COIN 1             7  - COIN 2
J  - 1P START           8  - 2P START
K  - 1P RIGHT           9  - 2P RIGHT
L  - 1P LEFT            10 - 2P LEFT
M  - 1P UP              11 - 2P UP
N  - 1P DOWN            12 - 2P DOWN
P  - 1P JUMP            13 - 2P JUMP
R  -                    14 -
S  - SERVICE            15 - COUNTER 2
T  -                    16 -
U  - RED (NEGATIVE)     17 - GREEN (NEGATIVE)
V  - BLUE (NEGATIVE)    18 - SYNC (NEGATIVE)
W  - AUDIO              19 -
X  - COUNTER 1          20 - +24 (just for the counter I think)
Y  - GND                21 - GND
Z  - GND                22 - GND