164.asm

数字电路的基础器件很有用的

     DIN BIT P2.1
     CLK BIT P2.0
     ORG 0
     LJMP MAIN
     ORG 0100H
MAIN:MOV DPTR,#TAB
AAA: MOV R1,#00H
AAA1:MOV A,R1
     MOVC A,@A+DPTR
     CALL DISP
     CALL DELAY
     INC R1
     CJNE R1,#0AH,AAA1
     LJMP AAA

DISP:MOV R0,#08H
DISP1:RLC A
     MOV DIN,C
     CLR CLK
     SETB CLK
     DJNZ R0,DISP1
     RET

DELAY:MOV   R4,  #07H
BB:   MOV   R5,  #0FFH
BB1:  MOV   R6,  #0FFH
BB2:  DJNZ  R6,  BB2
      DJNZ  R5,  BB1
      DJNZ  R4,  BB
      RET


TAB: DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H ;0123456789

     END