My custom modded PS1 SCPH-5502 (1995) with PSIO, RePSX PSU and PS1Digital on a convention last weekend : r/psx
Sony PlayStation PSIO Switchboard Install Guide - Consoles Unleashed
RetroModzz - PSIO fully installed and tested for old skool PlayStation console, brilliant piece of hardware, no more laser burnout load everything straight from an SD card. #PSIO #SwitchBoard #Flash #Cart #SD #
PSIO - PS1 Flash Cartridge / MY LIFE IN GAMING - YouTube