MUX (MULTIPLEXING) FUNCTION
This function multiplexes the integers. It is used to route on the output either the value of the CHANNEL A input when the CONTROL input is set to OFF or the value of the CHANNEL B input when the CONTROL input is set to ON.
When it is not connected, the COMMAND input is set to OFF.
When they are not connected, CHANNEL A and CHANNEL B are set to zero.