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DATA SEGMENT
BUFFER DB 1,6,2,5,4,7,3,8,9,8,"$" ;去掉一个,
DATA ENDS
CODE SEGMENT ;SEGNENT -->SEGMENT
ASSUME CS:CODE, DS:DATA
START: MOV AX,DATA
MOV DS,AX
LEA SI,BUFFER
LOP: MOV AL,[SI]
CMP AL,"$"
JE NEXT
OR AL,30H
MOV [SI],AL
INC SI
JMP LOP
NEXT: MOV AH,9
LEA DX,BUFFER
INT 21H
MOV AH,4CH
INT 21H ;21 -->21H
CODE ENDS
END START