The 5 bit data frame proved useful in the lab at uni where one of our tasks were to build a routable network over serial. :) Split each byte in 4-bit nibbles a

The 5 bit data frame proved useful in the lab at uni where one of our tasks were to build a routable network over serial. :) Split each byte in 4-bit nibbles and used the remaining data bit for not-quite-in-band-signalling.