This document presents a case study on interfacing a stepper motor with an 8086 microprocessor. It includes the following: 1) An overview of stepper motors, their windings, and protection of the windings. 2) A design to control a 4-phase stepper motor with clockwise and anticlockwise rotations using an 8086 program and hardware circuit. 3) The program uses assembly language instructions to output step signals to the motor in the proper sequence to rotate the shaft.