docs: def install_metaboard(
      replace_existing=False,
  ):
      """install metaboard.
  
      http://metalab.at/wiki/Metaboard
  
      """
      metaboard = AutoBunch()
      metaboard.name = 'Metaboard'
  
      metaboard.upload.protocol = 'usbasp'
      metaboard.upload.maximum_size = '14336'
      metaboard.upload.speed = '19200'
  
      metaboard.build.mcu = 'atmega168'
      metaboard.build.f_cpu = '16000000L'
      metaboard.build.core = 'arduino'
  
      metaboard.upload.disable_flushing = 'true'
  
      board_id = 'metaboard'
  
      install_board(board_id, metaboard, replace_existing=replace_existing)