print unpack 'B16', pack 'v', 1263;;
1110111100000100

print unpack 'B16', pack 'n', 1263;;
0000010011101111

print unpack 'b16', pack 'v', 1263;;
1111011100100000

print unpack 'b16', pack 'n', 1263;;
0010000011110111