Mega Drive Joystick
From HwB
Available at the Sega Mega Drive console.
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.