A course in microcomputer interfacing for science majors is described. The emphasis is on attaching devices to the computer rather than interconnecting the components of the computer itself. Lab exercises use an 8‐bit microcomputer, the Rockwell AIM 65 (now marketed by Dynatem, Inc., 22600‐D Lambert Street, El Toro, CA 92630), but they are not computer specific. Topics covered include handshaking, polling, interrupts, A/D and D/A conversion, and stepping motor control. Assembly language is introduced and used throughout the course.

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