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Mega Drive Joystick

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9 PIN D-SUB MALE at the Console.

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9 PIN D-SUB FEMALE at the joystick cable.

Pin Dir Select=L Select=H
1 <-- Up
2 <-- Down
3 <-- Ground Left
4 <-- Ground Right
5 --> +5VDC
6 <-- Button A Button B
7 --> Select
8 --- Ground
9 <-- Start Button C

Note: Direction is Computer relative Joystick.

Usually signals are multiplexed using a 74HC157. The console sets pin 7 (Select) to Low (GND) or High (+5VDC) to choose what the controller should return on pins 3, 4, 6 & 9.

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