7.9
DATA SEGMENT PARA  AT 0000H
	ORG 20H	
	BUF DB 4 DUP(?)
DATA ENDS
CODE SEGMENT
	ASSUME	CS:CODE
START: MOV AX,DATA
       MOV DS,AX
       MOV AX,40H
       MOV BX,0020H
       MOV [BX],AX
       MOV AX,20H
       MOV BX,22H
       MOV [BX],AX
       MOV AH,4CH
       INT 21H
CODE ENDS
      END START
