Plan 9 - man page for scc (plan9 section 3)
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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
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 parity.
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 8.
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