title: Is it possible to use 9-bit serial communication in Linux?
body: <p>RS-232 communication sometimes uses 9-bit bytes. This can be used to communicate with multiple microcontrollers on a bus where 8 bits are data and the extra bit indicates an address byte (rather than data). Inactive controllers only generate an interrupt for address bytes.</p>
  
  <p>Can a Linux program send and receive 9-bit bytes over a serial device? How?</p>