ORG 0 LOOP: MOV A,#0FEH MOV R2,#8 OUTPUT: MOV P1,A RL A ACALL DELAY DJNZ R2,OUTPUT LJMP LOOP DELAY: MOV R6,#0 MOV R7,#0 DELAYLOOP: ; DJNZ R6,DELAYLOOP DJNZ R7,DELAYLOOP RET END