32768   2 to the 15
16384	2 to the 14
 8192	2 to the 13
 4096	2 to the 12
 2048	2 to the 11
 1024	2 to the 10
  512	2 to the  9
  256	2 to the  8
  128	2 to the  7
   64   2 to the  6
   32	2 to the  5
   16	2 to the  4
    8	2 to the  3
    4	2 to the  2
    2	2 to the  1
    1	2 to the  0
-----
65535	=	range of 16 bit values

+ 32767

0

- 32767