3.asm

此程序是微机与接口技术的课程设计源程序

;3.ASM
EXTRN INFO1:BYTE,INFO2:BYTE,BUFA:BYTE,BUFB:BYTE
PUBLIC CHANGE2
CODE 	SEGMENT
  		ASSUME CS:CODE
HIGHTOLOW PROC NEAR
     	CMP AL,'A'
     	JB  STOP
     	CMP AL,'Z'
     	JA STOP
     	ADD AL,20H
STOP:	RET
HIGHTOLOW ENDP
CHANGE2 PROC FAR
     	LEA DX,INFO1
     	MOV AH,9
     	INT 21H
     	LEA DX,BUFA
     	MOV AH,10
     	INT 21H
     	LEA SI,BUFA+1
     	LEA DI,BUFB
     	MOV CH,0
     	MOV CL,[SI]
     	INC SI
NEXT:	MOV AL,[SI]
     	CALL HIGHTOLOW
     	MOV [DI],AL
     	INC SI
     	INC DI
     	LOOP NEXT
     	MOV BYTE PTR [DI] ,'$'
     	LEA DX,INFO2
     	MOV AH,9
     	INT 21H
     	LEA DX,BUFB
     	MOV AH,9
     	INT 21H
     	RET
CHANGE2 ENDP
CODE 	ENDS
  		END