Question

利用汇编语言程序上机操作方法,求1-20的所有偶数的和

Answer 1

        CODE  SEGMENT
              ASSUME    CS:CODE
      START:  MOV       AX,0
              MOV       CX,0AH
              MOV       BX,2
         @1:
              ADD       AX,BX
              INC       BX
              INC       BX
              LOOP      @1
              CALL      DSPAX
              MOV       AH,4CH
              INT       21H

;=============================== 
       DSPAX  PROC      NEAR
              PUSH      AX
              PUSH      BX
              PUSH      CX
              PUSH      DX
              PUSHF
              XOR       CX,CX
              MOV       BX,10
    @DSPAX1:
              XOR       DX,DX
              DIV       BX
              INC       CX
              OR        DX,30H
              PUSH      DX
              CMP       AX,0
              JNE       @DSPAX1
              MOV       AH,2
   @DISPAX2:
              POP       DX
              INT       21H
              LOOP      @DISPAX2
              MOV       DL,32
              INT       21H
              POPF
              POP       DX
              POP       CX
              POP       BX
              POP       AX
              RET
       DSPAX  ENDP
;==================================
        CODE  ENDS
              END       START