4-player interface

The following file can be found on the net so I (krupkaj) assume it can be distributed here:

Here are two separate instruction sets to build the adaptor:

Method 1

Some games, such as Gauntlet II, allow four player to play at once. Here are the pin assignments for the cable. You need two female 9-pin plugs and one 25-pin plug (don't remember if it's male or female).

Joystick 3	Parallel Port
1	6
2	7
3	8
4	9
6	11
8	25

Joystick 4	Parallel Port
1	2
2	3
3	4
4	5
6	1
8	24

Parallel port pins 18-25 are all connected to ground.

Method 2

I missed a chunk of this thread so I don't know if someone posted thewiring diagram. If not then

Printer port           Joystick 1              Joystick 2
 1           ---------->    6
 2           ---------->    1
 3           ---------->    2
 4           ---------->    3
 5           ---------->    4
 6           ---------------------------------> 1
 7           ---------------------------------> 2
 8           ---------------------------------> 3
 9           ---------------------------------> 4
11           ---------------------------------> 6
24           ---------->    8
25           ---------------------------------> 8

Looking into the joystick socket

 1 2 3 4 5
  6 7 8 9

Looking into the printer plug

 1  2  3  4  5  6  7  8  9 10 11 12 13
  14 15 16 17 18 19 20 21 22 23 24 25

All info courtesy of ST format jan 1991 issue.