jlbprof (760036) writes "When I was a young programmer (back in Apple II days). I had a much older programmer as a mentor. He once told me something that I have not seen anywhere written yet it is an absolute truth.
A Control Character's value can be calculated by bitwise anding the character with 0x1F.
Example: Carriage Return is a 0x0D or a control M.
M is 0x4D & 0x1F = 0x0D Voila!
Did you know that?"