Installation of the 12c508/9 "Stealth v2a" Mod
for a PU-18 PlayStation


This document is applicable to the stealth mod chip available from PS-Mod Solutions after 99.3.28. It is not guaranteed to work on chips currently available from any other vendor.


Removal of the PSX cover

Removal of the laser housing

Removal of the controller/memory card housing

Removal of the heavy metal bracket

Removal of the circuit board

Mounting the chip

Making the connections between the chip and the PSX PC board

Relevant pins of the 8-pin 12c508/9 chip

With the chip right-side up and the notch at the top, pin numbers are read counting down the left side from 1 to 4, and up the right side counting from 5 to 8. Pin 8 is located directly across the chip from pin 1.

	      1 - Vdd
              2 - memory card select (located on top of mainboard)
              4 - reset switch
	      5 - gate
              6 - data
              7 - door switch
              8 - Ground

Top of Mainboard

Bottom of Mainboard

That's all there is to it. Be sure to insulate the chip from the metal plate on the bottom of the PSX. Now, just reverse everything you did to take this thing apart, and you're done. Fire it up and play your imports without having to swap ever again.