# File lib/NADOLFile.rb, line 18
  def  NADOLFile.catalog_filename(filename)
    s=""
    for i in 0..0X0B
      c=(filename[i])
      if c.nil? then
        c=0xA0        
        else 
        c=(c|0x80)
      end
      s+=c.chr
    end
    s
  end