Index for Section 7

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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 hardware 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 condition 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),
  communications 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
  /dev/console
      console terminal

  /dev/tty00
      local terminal

  /dev/tty01
      local terminal

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

Index for Section 7

Alphabetical listing for S

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