dc(7)dc(7)NAMEdc - 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 communi‐
cations 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 communica‐
tions 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 (DECsta‐
tion 5100 only)
SEE ALSOconsole(7), devio(7), tty(7), MAKEDEV(8)dc(7)