SMOC system (Stepper Motor Controller) has been designed to control a stepper motor using a microcomputer. 7he system consists of Automatic Control Mode, Position Control Mode, Keyboard Control Mode, Timer Control Mode and other facilities like DOS System, Help Menu and Data Files. 7his package is menu oriented and developed using Turbo basic languagefor IBM PCIA Tcomputer. IBM PCIA T'S parallel printer port has been used to interface with the motor's power driver circuit which is specially designedfor this project. Controlled data such as the motor's speed, the direction of rotation, the current step number, the total steps number, the status of the motor as well as the speed indicator and the motor stepping simulation will be displayed on the screen. Sistem kawalan mikrokomputer ke atas motor pelangkah, SMOC (Stepper Motor Controller), telah direkabentuk. Sistem mi mempunyai mod kawalan automatik, mod kawalan kedudukan, mod kawalan papan kunci, mod kawalan bertempoh dan kemudahan lain seperti sistem DOS, menu bantuan dan fail data kawalan. Pakej sistem SMOC telah diorakkan dalam bahasa Turbo Basic yang berorientasikan menu dan dilarikan pada sebuah mikrokomputer IBM PC AT. Pengkalan Pencetak Selari komputer tersebut telah digunakan untuk mengantaramuka komputer dan litar pemacu motor yang telah direkabentuk khas. Data-data kawalan seperti laju motor, arah putaran, bilangan langkah, status motor, penunjuk laju dan simulasi pelangkahan motor dipaparkan pada layar.