Abstract: A real-tims control scheme of full digitalization for rotation speed of D.C. motor is presented in this paper. The control software was written in BASIC. The variable states, such as starting, acceleration, deceleration,direction change, stopping,, etc,have been performed. The result shows .that the software can reliably , accurately and quickly carry out real-time and stepless control over the motor according to the ?instruction inputted on keyboard within tha limits of the specified rotation speed' of the motor

Key words: D, C, motor, microcomputer, real-time control