The Joystick / Games Interface.
The Joystick interface was originally unveiled as part of the original IBM PC computer specification, and defines an analogue interface for connecting 2 analogue joysticks to a PC. Most interface cards supporting PC joysticks have only offered 1 joystick port however.
In order to keep with the original specification of as low a cost as possible for the joystick interface, the joystick interface consisted of 4 monostable multivibrators used for simple timer circuits to output a pulse of a width which was directly proportional to the resistance value from the joystick. The joystick interface also contained basic bus interface electronics.
Joystick/Games Port Pinouts and functions.
| Pin Number | Abbreviation | Function |
| 1 | +5V | +5VDC |
| 2 | Button 1 | |
| 3 | X0 | Position 0 (X coord) |
| 4 | GND | Ground |
| 5 | GND | Ground |
| 6 | Y1 | Position 1 (Y coord) |
| 7 | Button 2 | |
| 8 | +5V | +5VDC |
| 9 | +5V | +5VDC |
| 10 | Button 3 | |
| 11 | X2 | Position 2 (X coord) |
| 12 | GND | Ground |
| 13 | Y3 | Position 3 (Y coord) |
| 14 | Button 4 | |
| 15 | +5V | +5VDC |
See also:
RS-232 Serial, Parallel Port, PS/2, VGA, RJ-45 Network Port, USB, Firewire,