; VIET CT HIEN THI SO TRONG R0 LEN LED0 BANG CACH GOI CT CON DISPLAYLED0 ORG 2000H MAIN: MOV R0,#9H ACALL DISPLAYLED0 SJMP MAIN DISPLAYLED0: MOV A,#0E0H; 111'0' 0000: 'SANG LED0' ADD A,R0 ; A= 1110 1001 : LED0 SANG GIA TRI MOV DPTR,#0000H MOVX @DPTR,A RET END