Document Title: [Red Alert Tech.html (html file)]
Solder Side Parts Side
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Gnd | A | 1 | Gnd
+5V | B | 2 | +5V
+5V | C | 3 | +5V
Coin | D | 4 | Service Switch
N/U | E | 5 | N/U
N/U | F | 6 | N/U
N/U | H | 7 | Blue
Red | J | 8 | Green
N/U | K | 9 | N/U
Spkr+ | L | 10| Spkr-
+12V | M | 11| +12V
+12V | N | 12| +12V
H Sync | P | 13| N/U
N/U | R | 14| V Sync
P2 Start | S | 15| P1 Start
P2 Fire | T | 16| P1 Fire
P2 Right | U | 17| P1 Right
P2 Left | V | 18| P1 Left
N/U | W | 19| Coin Meter
-5V | X | 20| -5V
GND | Y | 21| GND
GND | Z | 22| GND
Note that this pinout is very close to KungFu Master. I believe
the colors on this or the KungFu Master pinout are labeled
incorrectly. The only differences I can see between this and
KungFu Master are: 1) Green & Red reversed, 2) KungFu Master has
composite sync on pin P whereas Red Alert has separate syncs, and
3) Red Alert has -5V on pins X and 20.
The pins may need to be reversed or flipped vertically so that pin
22 is pin 1, pin 21 is pin 2, adn so on.