title: Counting Hex in Assembly
body: <p>Im wondering, how does the hex system work in assembly?</p>
  
  <p>Lets say I have:
  0xFF,
  0xAB,
  0x10C,
  0XA,
  0XFC.
  I have an example where 4 + 0xFC = 0xFF
  Can someone explain for me what each letter and number means and how it is calculated? </p>