Function  09h   Print String 
      Outputs Characters in the Print String to the STDOUT 
entry   AH      09h 
	DS:DX   pointer to the Character String to be displayed 
return  none                                                        
note 1) The character string in memory must be terminated by a $ (24h) 
	The $ is not displayed. 
     2) Output to STDOUT is the same as function call 02h.