title: Signed vs Unsigned Binary numbers interpertaion
body: <p>I am just curious to know, what does make a machine to know whether its a -1 or 129 ?</p>
  <p><code>Unsigned uint8 0b10000001 (0x81 in hex) = 129 in decimal</code></p>
  <p><code>Signed uint8 0b10000001 (0x81 in hex) = -1 in decimal</code></p>