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4 X C
MAC stands for Multi-functional Advanced Computer. You can play games, make music, calculate numbers and write programs. It has 3 chips, 4K ROM and 512 bytes RAM. It also has 2 displays: a 4x4 LED matrix and a 8-digit VFD numerical display. The overlays are used to read the 16 LED display output. The programming part allows you to input a maximum of 55 codes to control the LED display and the musical output.