Interfacing stepper motor with Microcontroller 8051 full working and programming in Hindi

MOV P1, #00H
START:MOV DPTR, #9000H
            MOV R0, 04H
     UP: MOVX A, @DPTR
            MOV P1, A
            LCALL DELAY
            INC DPTR
            DCR R0
            JNZ UP
            LJMP START