# File lib/HGR.rb, line 69
        def HGR.can_be_hgr_screen?(buffer,memory_location=nil)
        
        #because only 120 out of every 128 bytes are shown, the last 8 bytes are not needed
                #in order to save a sector under dos 3.3 it was common to only store 8192=8184 (0x1FF8) bytes
                #sometimes an extra sector was included by mistake
                        if (buffer.length>=8184 && buffer.length<=8192) && ((memory_location.nil?) || (memory_location==0))
                                return true
                        end
      
      if (buffer.length>=8184) && ((memory_location==0x2000) || (memory_location==0x4000))
                                return true
                        end
                false
        end