if 0 {I've come across skepticism about [Tcl]'s facility for bit manipulation one too many times.
While [RS]'s usual ''tour de forces'' such as "[Playing with bitstrings]" and "[Big bitstring operations]"
show how '''good''' Tcl can be at bit manipulation, this page has a far more limited ambition:
simply to help hardware- or [C]-oriented developers to feel comfortable working on low-level
data in a higher-level language.}

      # Let's experiment:  one model for "low-level data" is a byte array, or
      # byte sequence.  A sequence of eight-bit values is often the manifestation
      # of information received from a physical device through a serial port, or
      # from a remote host through a network connection.  Start, then, with
      # sample data:
  set sample "\