Amiga 4 joysticks adapter

pinout

This adapter will make it possible to connect 2 extra joysticks to the Amiga. This requires that the game is aware of this Multi-Joystick Extender in order to use it. The adapter is connected to the parallelport of the Amiga

9 pin D-SUB male connector  to the joysticks

Parport Joy 1 Joy 2 Up 1 2 1   Down 1 3 2   Left 1 4 3   Right 1 5 4   Up 2 6   1 Down 2 7   2 Left 2 8   3 Right 2 9   4 Fire 2 11   6 Fire 1 13 6   Ground 2 18   8 Ground 1 19 8

25 pin D-SUB male connector  to the cable

Source:www.pinouts.ru