Notes on Installing PSIO in PlayStation One

Introduction

• Discussion on installing a PSIO unit in a PlayStation One.
• PSIO allows playing backups off an SD card.
• Installation requires soldering several wires to the motherboard.

Preparation

• The PlayStation is already taken apart for modification.
• A mod chip and BIOS are previously installed which allows Game ID to be sent to a memory card (M Pro 2).
  • This feature enables easier game switching, as it automatically selects the new game slot.

Cleaning the Board

• The back of the motherboard is dirty and needs cleaning before installation.
• Flux residue should be cleaned off before proceeding with soldering.

Installing the PSIO Board

Diagram Reference

• A diagram is used to follow the installation steps.
• The PSIO board is mounted in a specific location on the motherboard.

Cutting Traces

• Important to cut specific traces on the motherboard to install the PSIO properly:
  1. Cut a trace three spots across from a specified point.
  2. Second cut is near the ground point.
  3. Final cut is above the ground holes.
• Use a multimeter in continuity mode to ensure traces are cut properly.

Soldering Wires

Wire Preparation

• Nine wires need to be cut and prepared for soldering:
  • Use 30 AWG wire for connections.

Soldering Steps

• Soldering to the board involves the following connections:
  1. PE
  2. PI
  3. VDD
  4. Ground
  5. XI
  6. CI
  7. Ensure wires do not cover ground pads as they are used elsewhere in the console.

Finalizing Installation

• Once all wires are soldered:
  • Clean the board and ensure no shorts with the PSIO board.
  • Reassemble the PlayStation One.

Testing the Setup

• Upon reassembly, power the console to check functionality.
• The PlayStation intro plays successfully indicating the system is working.
• The SD card is checked for games; some games may need proper setup.

Conclusion

• The PSIO setup is successful, demonstrated with the loading of backup games.
• Future videos may cover flashing BIOS and using mod chips.
• Resources and guides are available for different motherboard types.

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