DATAS SEGMENT    '輸入數(shù)據(jù)段代碼'
     
    MESSAGE DB 'PLEASE INPUT A NUMBER TO RING$'   
DATAS ENDS       '數(shù)據(jù)段結(jié)束'

STACKS SEGMENT 
    STACKS ENDS 

CODES SEGMENT 
    ASSUME CS:CODES,DS:DATAS,SS:STACKS 
START: 
    MOV AX,DATAS                           '賦給數(shù)據(jù)段地址'
    MOV DS,AX 
    PRINT:  MOV AL,9 
        LEA DX,MESSAGE '把MESSAGE存到DX'
        INT 21                             '中斷指令 '
         
        MOV AH,01H   
        INT 21H                            '中斷指令 '
         
        CMP AL,3AH                         '比較(兩操作數(shù)作減法,僅修改標(biāo)志位,不回送結(jié)果)'
        JGE PRINT                          '大于轉(zhuǎn)移'
          
        CMP AL,30H                         '比較(兩操作數(shù)作減法,僅修改標(biāo)志位,不回送結(jié)果)'
        JL PRINT                           '小于轉(zhuǎn)移'
         
        MOV CX,0000H 
        AND AX,00FFH 
        MOV CL,AL 
        SUB CX,30H 
        MOV DL,01H 
AGAIN:  MOV AH,02H 
        INT 21H                            '中斷指令 '
        LOOP AGAIN                         '再次循環(huán)'
     
     
    MOV AH,4CH 
    INT 21H                                '中斷指令 '
CODES ENDS                                 '代碼段結(jié)束'
    END START                              '匯編結(jié)束'