Copyright (c) 1990 The Regents of the University of California.
All rights reserved.

This code is derived from software contributed to Berkeley by
the Systems Programming Group of the University of Utah Computer
Science Department.

%sccs.include.redist.man%

@(#)dca.4 5.1 (Berkeley) 06/29/90

C 7 dca - HP 98644A communications interface "device dca0 at scode9 flags 0x1" The 98644A is a single port EIA RS-232C (CCITT V.28) communications interface with a single character buffer. Such an interface is built-in to all series 300 machines.

Each 98644A line behaves as described in tty (4). Input and output for each line may set to one of following baud rates; 50, 75, 110, 134.5, 150, 300, 600, 1200, 1800, 2400, 4800, 9600, 19200. See tty (4) for the encoding.

Flags should be set to 1 if the line should be treated as hard-wired with carrier always present or 0 if modem control is desired.

/dev/tty0 tty(4) dca%d: silo overflow. The single-character input ``silo'' has overflowed and incoming data has been lost. Data loss is possible on busy systems with baud rates greater than 300. The dca has never been tested with modem control enabled or on anything but the built-in interface.