scc(3) [plan9 man page]

SCC(3)							     Library Functions Manual							    SCC(3)

NAME

       scc, duart, uart - serial communication control

SYNOPSIS

       bind -a #t /dev

       /dev/eia0
       /dev/eia0ctl
       /dev/eia1
       /dev/eia1ctl

DESCRIPTION

       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 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.

SOURCE

       /sys/src/9/port/devscc.c
       /sys/src/9/*/devduart.c
       /sys/src/9/*/devuart.c

																	    SCC(3)

dc(7)							 Miscellaneous Information Manual						     dc(7)

NAME

       dc - serial line/mouse/keyboard

SYNOPSIS

       controller   dc0   at ibus0   slot 0   vector dcintr

DESCRIPTION

       The  dc	serial	line controller provides DECstation 2100, DECstation 3100, DECstation 5000, and DECstation 5100 computer systems with key-
       board, mouse, and serial communications interfaces. The serial communications interfaces on the DECstation 2100 and DECstation 3100 provide
       partial	modem  control.  The  serial communications interfaces on the DECstation 5000 provide full modem control.  The device special file
       /dev/tty01 on a DECstation 5100 provides full modem control, while the remaining ports provide no modem control at all.	All serial  commu-
       nications interfaces operate at baud rates from B50 to B9600, excluding B200.

       The  dc	ports  are  used as follows: Usage Graphics device keyboard at 4800 BPS Mouse or tablet at 4800 BPS Communications port 1 (w/modem
       control)/local terminal Communications port 2 (w/modem control)/local terminal

       On all systems except the DECstation 5100, serial port 2 is used for the system console port in server (that is,  non-graphics)	configura-
       tions.  On DECstation 5100s, the serial port labeled 3 on the back of the system is always the system console port.  The serial system con-
       sole port always operates at 9600 BPS, 8-bits, no parity; modem control is not supported.

RESTRICTIONS

       Data communications equipment attached to the console serial port in server configurations must be set to 9600 BPS, 8-bits, no parity.  The
       scc driver enforces this restriction.

FILES

       console terminal local terminal local terminal local terminal (DECstation 5100 only)

RELATED INFORMATION

       console(7), devio(7), tty(7), MAKEDEV(8) delim off

																	     dc(7)