4.asm

此程序是微机与接口技术的课程设计源程序

;4.ASM
EXTRN 	BUF:BYTE,INFO3:BYTE
PUBLIC CHANGE3
CODE 	SEGMENT
CHANGE3 PROC FAR
       	ASSUME CS:CODE
       	SUB AX,AX
       	MOV CH,4
       	MOV CL,4
       	MOV BX,4A8FH
ROTATE: 
ROL BX,CL
        MOV AL,BL
        AND AL,0FH
        ADD AL,30H
        CMP AL,3AH
        JL PRINTIT
        ADD AL,7H
PRINTIT: 
MOV DL,AL
MOV AH,2
   		INT 21H
      	DEC CH
      	JNZ ROTATE
     	MOV DL,'H'
      	MOV AH,2
      	INT 21H
      	RET
CHANGE3  ENDP
CODE 	ENDS
     	END