Interface: RS232 V.24 FIFO buffer: 16C550 with 16bytes I/O addresses and interrupt: are assigned by the operating system. Data bits: 7 and 8 / Stop bits: 1, 1.5, 2 / Parity: none, even, odd, space, mark Signals RS232: TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND