DESCRIPTION
The nmdm driver provides two tty(4) devices connected by a virtual ""null modem"" cable. If either of the two tty devices have the CDSR_OFLOW bit (""sttydsrflow"") set in their line discipline, the nmdm device will emulate the speed configured in the termios(4) settings. The speed emulation works independently in the two directions, controlled by the slower ends termios settings ( c_ispeed, c_ospeed, CS5 ... CS8, CSTOPB and PARENB).
FILES