The Busch 2090 Microtronic Computer System was a 4 bit microprocessor trainer from the early 1980s, similar in spirit to the KIM 1, Microprofessor, and likewise CPU trainers of that time. It was made by the company Busch Modellbau GmbH located in Viernheim, Germany.
This Arduino-based Microtronic emulator has some features not found in the original Microtronic, such as SDCard-based program storage, an LCD display for programm debugging and CPU status display, as well as Emic 2-based speech synthesis.
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