ORG 0000H
      LJMP MAIN
      ORG 0030H
MAIN: CLR P1.0
      MOV R1,#01H
      MOV R7,#20
      MOV DPTR,#TAB

LOOP: MOV A,R1
      MOVC A,@A+DPTA
      MOV TL0,A
      INC R1
      MOV A,R1
      MOVC A,@A+DPTA
      MOV TH0,A
      INC R1
      SETB TR0
LOOP1:JBC TF0,NEXT
      SJMP LOOP1
NEXT: CPL P1.0
      DJNZ R7,LOOP
      END