In 1979, S.D. Systems and Micro Design Concepts released the Z80 Starter Kit as an SBC - single board computer. Able to run either 8080 or Z80 software, it was designed as the best value on the market for the hobbiest / experimenter / student who wants to learn about and work with microcomputers.The built-in ZBUG Monitor program is a 2,048 byte program written for the Z80 which allows the user to enter and debug machine-level Z80 programs. Input is accomplished via a hexadecimal keyboard plus 12 command keys. Output is the 6-digit 7-segment LED display.