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Here is the Playstation interface schematic. All diodes are standard signal (1N914) diodes. The interface is shown looking into the pad's connector.

PlayStation Interface

To hook up the second controller duplicate all connections except DB25-10 and DB25-12. For pad 2, replace the DB25-10 connection with a connection to DB25-13, and the DB25-12 with DB25-15. Note that the parallel port may not be able to supply enough power to run a second controller, and you may only be able to run one at a time without using an external power supply.

The optional line is only necessary if you are running a Dual-Shock pad, and want to use force feedback. If you're not running a dual-shock pad, or don't want to use force feedback, don't hook anything up to the optional (pad pin 3) pin/line.

This interface has been built and tested by different folks on several analog, digital, racing, Sony(tm) and clone pads. If you're having troubles, and have already double-checked the wiring and diode orientation, try using the Advanced tab in the control panel and increasing the PSX scan delay.

If your controller doesn't power up (many racing controllers need more power than the parallel port can supply, for example) you may want to try adding an external 5V power supply:

  • Remove the diodes from the DB25 connector
  • Replace with the +5V lead
  • Wire the supply ground line to the DB25-18/19 line.

Be aware that this interface is different from SnesKey's interface.

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Last updated April 19, 1999. Comments welcomed.
This site and all information contained within is Copyright 1999 Earle F. Philhower, III. Iomega, Syquest, SparQ, Jaz, Zip, and other names are trademarks or property of their respective owners.