ms-dos2.asm

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DSEG          SEGMENT   
MESS          DB        'HELLO WORLD' ,0DH,0AH,'$'
DSEG          ENDS
                                  
CSEG          SEGMENT   
              ASSUME    CS:CSEG,DS:DSEG
START:        MOV       AX,DSEG 
              MOV       DS,AX
              MOV       DX,OFFSET MESS  ;寄存器DX是作显示之用。
              MOV       AH,9H
              INT       21H
              MOV       AH,4CH
              INT       21H
             
CSEG          ENDS    
              END       START