exp_9_1.asm

单片机硬件实验代码

          ORG      0000H                             
          LJMP     START
          ORG      0030H
   START: MOV      30H,#40H
          MOV      31H,#50H
          MOV      32H,#02H
          
          MOV      R0,30H
          MOV      R1,31H
          MOV      R7,32H
          
   LOOP:  ACALL    DBADD
          MOV      R6,#04H       ;加完可能进位几次
     _A:  JNC      NOCARRY       ;有没有溢出
          INC      R1
          MOV      A,#00H
          ADDC     A,@R1
          DA       A
          MOV      @R1,A
          DJNZ     R6,_A
 NOCARRY: MOV      R1,31H
          DJNZ     R7,LOOP
          SJMP     $       
               
   DBADD:  MOV       R6,#02H
           CLR       C
    LOOP1: MOV       A,@R0
           ADDC      A,@R1
          ;二进制/BCD码选择
           DA        A
           MOV       @R1,A
           INC       R0
           INC       R1
           DJNZ      R6,LOOP1
           DEC       R1
           RET
           
           END