new_contents: #!/usr/bin/env python
  """
  A little helper script to upload a binary file.
  
  Usage:
      upload_helper.py <file>
  
  Writes hex representation of file 16 bytes per line pausing between lines.
  """
  
  from __future__ import print_function
  
  import sys
  import time
  
  def main():
      with open(sys.argv[1], 'rb') as f:
          n = 0
          while True:
              bs = f.read(48)
              if len(bs) == 0:
                  break
              n += len(bs)
  
              print(bs.encode('hex'))
              sys.stdout.flush()
              while sys.stdin.read(1) != ':':
                  # spin
                  pass
  
              sys.stderr.write('{0:04X} '.format(n))
              sys.stderr.flush()
      print('')
  
  if __name__ == '__main__':
      main()
  
subject: add helper program for uploading ROM