Write an assembly program for DC motor speed control. You program should work as

follows:

 When it is started, the motor spins at the speed of 20 rps (rounds per second).

 Every time when key 1 on the keypad is pressed, the motor speed is increased

by 10 rps. What is the maximal speed you can achieve?

 Every time when key 2 on the keypad is pressed, the motor speed is decreased

by 10 rps. What is the minimum speed you can achieve?

 When key 3 is pressed, the motor stops.

 When key 4 is pressed, the motor starts spinning at the speed of 20 rps.

-Write an assembly program for DC motor speed control. You program should work as

follows:

　When it is started, the motor spins at the speed of 20 rps (rounds per second).

　Every time when key 1 on the keypad is pressed, the motor speed is increased

by 10 rps. What is the maximal speed you can achieve?

　Every time when key 2 on the keypad is pressed, the motor speed is decreased

by 10 rps. What is the minimum speed you can achieve?

　When key 3 is pressed, the motor stops.

　When key 4 is pressed, the motor starts spinning at the speed of 20 rps.