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  Function 08H (decimal 8) waits for input, does not echo, and breaks on a
  Ctrl-C. It is identical to function 01H, except it does not echo the input
  to the display screen (or standard output device).

  See the discussion under function 01H for a description of this function.
  Compare this function with functions 01H, 06H, and 07H. If you want to
  use this function but don't want to wait when input is not ready, see
  function 0BH, which reports whether or not input is ready. See function
  0CH for a variation of this function.