INT 16 - HUNTER 16 - CONTROL SCREEN DUMP AREA                                   
	AH = 27h
	AL = what to dump
	    00h whole (virtual) window
	    01h LCD(Liquid Crystal Display) window only
Return: AL = 00h
Desc:	control whether printscren dumps the whole 80x25 screen or only the
	  part displayed in the LCD(Liquid Crystal Display) window
Note:	the Hunter 16 has a 240x64 LCD(Liquid Crystal Display) display which serves as a window into
	  a 640x200 virtual screen