data segment
DATA ENDS
CODE SEGMENT
	Assume	cs:code,ds:data
start:mov dx,data
      mov ds,dx
      mov al,00010001b
      mov dx,283h
      out dx,al  
      mov al,5
      mov dx,280h
      out dx,al
      hlt
      mov   ah,4ch
      int   21h
      code	ends
end   start