GBCCAT – Gameboy Color Emulator by Nathalis based on GNUBOY, still in development, used hardware is ESP32 WROVER chip, ST7789 1.3″ LCD 240*240px, loading games from microSD card, emulator has been controlled by PS2 (USB) keyboard, source and schematic is avaliable on Github: https://github.com/nathalis/GBCCAT