Teensy RTOS PsNee Open source stealth modchip for the Sony Playstation 1 based on freeRTOS running on Teensy 3.6; 4.0 and 4.1 boards. Tested with Teensy 4.0. Includes PSOne PAL BIOS Patch Dependencies FreeRTOS Port for Teensy 3.5, 3.6, 4.0, 4.1 Teensy: development platform for PlatformIO Hardware Teensy 3.6 Teensy 4.0 Teensy 4.1 Installation PsNee Installation Guide References PsNee PsNee ESP32