This is compatible with all models of the original Playstation 1, the slim version isn't compatible.
With this simple mod, you can reset your console with your controller using a button combination.
This is the perfect solution for PSIO and XStation as these don't have an In Game Reset feature.
This will allow easy swapping of games without getting up out of the comfort of your chair :)
You can use this with or without any drive emulators to still bring an awesome feature to the console.
Pressing L2 + R2 + SELECT + START gives a short reset pulse.
(xStation = Reset the current game being played)
Pressing L2 + R2 + SELECT + CROSS gives a long reset pulse.
(xStation = Reset the system and return to game list)
Installation Guide: Here