88 lines
3.1 KiB
Groff
88 lines
3.1 KiB
Groff
.\" $NetBSD: dca.4,v 1.4 1997/10/19 12:56:24 mrg Exp $
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.\"
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.\" Copyright (c) 1990, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" the Systems Programming Group of the University of Utah Computer
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.\" Science Department.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" from: @(#)dca.4 8.1 (Berkeley) 6/9/93
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.\"
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.Dd June 9, 1993
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.Dt DCA 4 hp300
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.Os
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.Sh NAME
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.Nm dca
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.Nd
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.Tn HP 98644A
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communications interface
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.Sh SYNOPSIS
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.Cd "device dca0 at scode9 flags 0x1"
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.Sh DESCRIPTION
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The
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.Tn 98644A
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is a single port
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.Tn EIA
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.Tn RS-232C
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.Pf ( Tn CCITT
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.Tn V.28 )
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communications interface with a single character buffer.
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Such an interface is built-in to all series 300 machines.
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.Pp
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Input and output for each line may set to one of following baud rates;
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50, 75, 110, 134.5, 150, 300, 600, 1200, 1800, 2400, 4800, 9600 or
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19200.
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.Pp
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An optional argument
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.Ar flags
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may be set to 1 if the line should be treated as hard-wired
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with carrier always present or 0 if modem control is desired.
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.Sh FILES
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.Bl -tag -width Pa
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.It Pa /dev/tty0
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.El
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.Sh DIAGNOSTICS
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.Bl -diag
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.It dca%d: silo overflow.
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The single-character input
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.Dq silo
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has overflowed and incoming data has been lost.
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.El
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.Sh SEE ALSO
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.Xr tty 4
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.Sh BUGS
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Data loss is possible on busy systems with baud rates greater than 300.
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The
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.Nm dca
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has never been tested with modem control enabled or on anything but the
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built-in interface.
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