title: How to calculate excess-256 and excess-128?
body: <p>I have the number -37 in decimal. Could you please tell me what its representation is in excess-256 and excess-128?</p>
  
  <p>Its normal binary representation is -100101 and in 8 bits 1010 0101. How exactly do I then get the excess-N representation for it? Am I allowed to have a number larger than 8 bits when writing excess-N? Would I thus have: </p>
  
  <p>01010 0000 (first digit) + 10000 0000 and 00101 + 10000 00000?</p>