SCC(3) Library Functions Manual SCC(3)
scc, duart, uart - serial communication control
bind -a #t /dev
The serial line devices serve a one-level directory, giving access to
the serial ports. There are several devices serving the same files;
the particular one used depends on the machine involved. Eia0 is a
stream data file. It can be read and written to use that port. Reads
will block until at least one character is available. Eia0ctl is a
stream control file associated with the port. Eia1 and eia1ctl are
similar, but for a second serial line.
The ctl file can be used to push stream modules onto the port. One can
also write one of the following textual commands to a ctl file:
bn Set the baud rate to n.
dn Set DTR if n is non-zero; else clear it.
kn Send a break lasting n milliseconds.
rn Set RTS if n is non-zero; else clear it.
mn Obey modem CTS signal if n is non-zero; else clear it.
pc Set parity to odd if c is o, to even if c is e; else set no par-
sn Set number of stop bits to n. Legal values are 1 or 2.
ln Set number of bits per byte to n. Legal values are 5, 6, 7, or