# File lib/image_formats/A2Dsk.rb, line 33
def get_sector(track,sector)
  return nil if self.class.interleave.nil?
  return nil unless sector.between?(0,0x0F)
  physical_sector=self.class.interleave[sector]
  start_byte=track*16*256+physical_sector*256
  file_bytes[start_byte,256]
end