masm2015 疑似09h的问题，就解决

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masm汇编语言问题 将字符串小写变成大写字母，虽然变成功了，但是在结果后为什么有大片乱码？ DATAS SEGMENT VAR DB 'This is assembly language' VAR1 DB 50 DUP(?) DATAS ENDS STACKS SEGMENT DB 128 DUP(?) STACKS ENDS CODES SEGMENT ASSUME CS:CODES,DS:DATAS,SS:STACKS START: MOV AX,DATAS MOV DS,AX MOV CX,25 XOR DX,DX LEA SI,VAR LEA DI,VAR1 MOV AL,[SI] L1: MOV AL,[SI] CMP AL,61h JAE L2 MOV [DI],AL INC SI INC DI LOOP L1 L2: MOV AL,[SI] CMP AL,7ah JB L3 MOV [DI],AL INC SI INC DI LOOP L1 L3: SUB AL,20H INC SI MOV [DI],AL INC DI LOOP L1 LEA DX,VAR1 MOV AH,09H INT 21H MOV AH,4CH INT 21H CODES ENDS END START

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没有人看看我吗感觉不难的