This guide will show you how to install the switchboard for Cybdyn Systems PSIO flash cartridge in to a Sony PlayStation.
The guides here have a number of improvements over the official PSIO install guides by reducing the required steps for some of the console revisions such as less trace cuts, less solder mask removal, and alternative and improved solder points.
Please note, the original PSIO switchboard uses VDD for the positive power supply, hence why this guide uses VDD. Other switchboards that omit the protection diode may use a different name. For the sake of clarity, VDD, VCC, and 3V3 can all be considered the same for an install. They all reference the positive power supply of 3.3V. Similarly, VSS and GND relate to ground and 0.0v. If you can’t work this out, put down your soldering iron.
SCPH-100X / PU-8 Solder Map
2 trace cuts, 1 resistor removal, 0 via mask removal, 0 via solder points, 0 port pin solder points.
SCPH-550X / PU-18 Solder Map
3 trace cuts, 2 via solder mask removal, 2 via solder points, 0 port pin solder points.
SCPH-700X / PU-20 Solder Map
Three trace cuts, 4 via solder mask removal, 4 via soldering points, 5 port pin soldering points.
SCPH-750X / PU-22 Solder Map
3 trace cuts, 4 via solder mask removal, 4 via soldering points, 4 port pin soldering points.
