carrier : 1000 zero: 1100 one: 1110
states: byte 1: latC output byte 2 high quartet: nb transitions byte 2 low quartet: latA low quartet output
transitions: byte 1: b0=1: b7..b1 delay byte 1: b0=0: b7..b4 latB high quartet input b3..b2 latA,4 latA,5 b1=0 byte 2: target state offset
byte 2 high quartet: latbB high quartet output
send output vector: b7..b4 latB high quartet b3..b2 latA,4 latA,5 b1=0 b0=0 / 1 on error
byte 1: high quartet display on latC byte 2: low quartet display quartets swap on latB high / latA low
expand byte1 into quartets display in byte1 + byte 2 send 2 bytes automaton