The pin numbering for the PSX connector presented here is reversed from the numbering in
the linux joystick-parport.txt document.
The original linux interface does not include +7v required for force feedback operation.
The interface wil function properly without the +7v supply but no force feedback will be possible.
See the Powering PSX pads page for details on how to provide the +3.5v
and +7.6v required by the PSX pads.
This interface is the same as the PSX interface for SNESkey