I'm building an arcade cabinet using my old Dimension 8100.   I'd really like to be able to power on and off the computer with one button push, most preferably on the outside of the arcade cabinet.  Many people have accomplished this by removing the power button from the front of the computer and rewiring it to an arcade pushbutton with a microswitch, which then acts as the power button.  This allows the arcade pushbutton to be mounted somewhere else on the arcade cabinet.

 

I opened my 8100 case, and instead of a single set of wires running to the power button, there is a 16 pin ribbon cable that runs to a controller card, which then contains switches for the power button, reset button and LEDs.  Since the computer will be in the cabinet, I dont think I need any of these other than the power button.  I've searched for the pinout for the controller card, with no luck.  Does anyone know which pins on the motherboard are used for the power switch so I can wire this thing up and play some Donkey Kong?

 

Thanks