60 FPS gaming on an E Ink display? That doesn’t seem right… But that’s exactly what Wenting Zhang’s PaperBoy Game Boy emulator project does, using the M5Stack PaperS3 devkit, pairing an ESP32-S3 wireless microcontroller with a 4.7-inch E Ink display with 960 x 540 resolution.One of the tricks here is that the bottom part of the ePaper touchscreen display is used for control buttons and doesn’t need to be refreshed, while the active part only requires 160 x 144 resolution, scaled three times to represent various shades of grey.Contrary to most small Eink devkits, the PaperS3 features a screen with a raw row/column driver interface, which enabled him to drive the display while bypassing the normal waveform method, and deliver a higher refresh rate up to 60 FPS. Wenting didn’t reinvent the wheel for the Game Boy emulation part, and after testing three different emulators, he went with the CrankBoy project, delivering better performance at 30-60 FPS for most games. Tetris appears to be the most demanding game, while Super Mario Land offers the highest frame rate.The audio implementation was also a challenge, mostly because the PaperS3 devkit only comes with a buzzer that can handle a single tone at a time. He solved the issue by using square waves for audio output. User input was easier with the touch screen, and Bluetooth LE joypad support was also added to the project.PaperBoy S3 with Bluetooth controller