Mega Drive Joystick
From HwB
Available at the Sega Mega Drive console.
[edit] Pinout
9 PIN D-SUB MALE at the Console.
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.