253     11111101000000000000000000000000        7
254     11111110000000000000000000000000        7
255     11111111000000000000000000000000        7
256     00000000000000010000000000000000        0

##</code><code>##

perl -le'print join "\t", $_, (unpack "B*", pack "N", $_), ($_ & 0xFF) >>5 for (0..256)'