scc man page on OSF1

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scc(7)									scc(7)

NAME
       scc - Serial keyboard/mouse/communications interface

SYNOPSIS
       controller   scc0   at tc0   slot 3   vector sccintr

DESCRIPTION
       Two  base  board	 Zilog scc dual UARTS provide DEC 3000 series personal
       systems with keyboard, mouse,  and  serial  communications  interfaces.
       The serial communications interfaces can operate at baud rates from B50
       to B57600 (see tty(7)).

       The driver for the scc interface supports hardware flow	control	 using
       the  Request to Send (RTS) and Clear to Send (CTS) signals.  When hard‐
       ware flow control is enabled, the flow of input data is	controlled  by
       the  RTS	 signal	 and  the flow of output data is controlled by the CTS
       signal.	If the CTS signal is off, the driver will  suspend  output  to
       that  line until the CTS lead is reasserted.  Likewise, the driver will
       turn off the RTS lead to tell the device connected to the line to  stop
       sending data as a result of congestion on the host side.	 When the con‐
       dition clears, the driver will turn on the RTS lead to tell the	device
       to resume sending data.

       In alternate console configurations (that is, no graphics head), commu‐
       nications port 2 (/dev/tty01) becomes the system	 console.  The	serial
       system console port always operates at 9600 BPS, 8-bits, no parity.  No
       modem or hardware flow control is supported.

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

       Only communications port 1 (/dev/tty00) includes full modem control.

FILES
       console terminal local terminal local terminal

SEE ALSO
       console(7), devio(7), modem(7), tty(7), MAKEDEV(8)

									scc(7)
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