4-2.asm

这是用proteus和keil两个平台一起完成的

           ORG 30H
START:     MOV DPTR,#TABLE
LOOP:      CLR A
		   MOVC A,@A+DPTR
		   CJNE A,#0FFH,LOOP1
		   JMP START
LOOP1:     MOV P2,A
           CALL DELAY
		   INC DPTR
		   JMP LOOP
DELAY:     MOV R3,#20
D1:        MOV R4,#20
D2:        MOV R5,#248
           DJNZ R5,$
		   DJNZ R4,D2
		   DJNZ R3,D1
		   RET
TABLE:     DB 01H,02H,04H,08H,10H,20H,40H,80H
           DB 80H,40H,20H,10H,08H,04H,02H,01H
		   DB 03H,06H,0CH,18H,30H,60H,0C0H
		   DB 0C0H,60H,30H,18H,0CH,06H,03H
		   DB 0FFH
		   END