This repository contains a collection of Arduino-based emulators for the vintage Busch 2090 Microtronic Computer System, an educational 4-bit computer from Germany produced in the early 1980s. The project provides multiple implementation versions ranging from simple Arduino Uno R3 setups to more advanced "Next Generation" hardware featuring OLED displays and SD card storage. It includes comprehensive documentation on reverse-engineered protocols such as the 2095 Cassette Interface, machine code sound output techniques, and various built-in ROM programs for games like Lunar Lander and Nim.
