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9903e566 | 1 | .\" Copyright (c) 1990, 1991 The Regents of the University of California. |
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2 | .\" All rights reserved. |
3 | .\" | |
4 | .\" This code is derived from software contributed to Berkeley by | |
5 | .\" the Systems Programming Group of the University of Utah Computer | |
6 | .\" Science Department. | |
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7 | .\" Redistribution and use in source and binary forms, with or without |
8 | .\" modification, are permitted provided that the following conditions | |
9 | .\" are met: | |
10 | .\" 1. Redistributions of source code must retain the above copyright | |
11 | .\" notice, this list of conditions and the following disclaimer. | |
12 | .\" 2. Redistributions in binary form must reproduce the above copyright | |
13 | .\" notice, this list of conditions and the following disclaimer in the | |
14 | .\" documentation and/or other materials provided with the distribution. | |
15 | .\" 3. All advertising materials mentioning features or use of this software | |
16 | .\" must display the following acknowledgement: | |
17 | .\" This product includes software developed by the University of | |
18 | .\" California, Berkeley and its contributors. | |
19 | .\" 4. Neither the name of the University nor the names of its contributors | |
20 | .\" may be used to endorse or promote products derived from this software | |
21 | .\" without specific prior written permission. | |
22 | .\" | |
23 | .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
24 | .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
25 | .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
26 | .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
27 | .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
28 | .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
29 | .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
30 | .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
31 | .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
32 | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
33 | .\" SUCH DAMAGE. | |
f4a65166 | 34 | .\" |
af359dea | 35 | .\" @(#)dca.4 5.2 (Berkeley) 3/27/91 |
f4a65166 | 36 | .\" |
af359dea | 37 | .Dd March 27, 1991 |
9903e566 CL |
38 | .Dt DCA 4 hp300 |
39 | .Os | |
40 | .Sh NAME | |
41 | .Nm dca | |
42 | .Nd | |
43 | .Tn HP 98644A | |
44 | communications interface | |
45 | .Sh SYNOPSIS | |
46 | .Cd "device dca0 at scode9 flags 0x1" | |
47 | .Sh DESCRIPTION | |
48 | The | |
49 | .Tn 98644A | |
50 | is a single port | |
51 | .Tn EIA | |
52 | .Tn RS-232C | |
53 | .Pf ( Tn CCITT | |
54 | .Tn V.28 ) | |
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55 | communications interface with a single character buffer. |
56 | Such an interface is built-in to all series 300 machines. | |
9903e566 | 57 | .Pp |
f4a65166 | 58 | Input and output for each line may set to one of following baud rates; |
9903e566 CL |
59 | 50, 75, 110, 134.5, 150, 300, 600, 1200, 1800, 2400, 4800, 9600 or |
60 | 19200. | |
61 | .Pp | |
62 | An optional argument | |
63 | .Ar flags | |
64 | may be set to 1 if the line should be treated as hard-wired | |
f4a65166 | 65 | with carrier always present or 0 if modem control is desired. |
9903e566 CL |
66 | .Sh FILES |
67 | .Bl -tag -width Pa | |
68 | .It Pa /dev/tty0 | |
69 | .El | |
70 | .Sh DIAGNOSTICS | |
71 | .Bl -diag | |
72 | .It dca%d: silo overflow. | |
73 | The single-character input | |
74 | .Dq silo | |
f4a65166 | 75 | has overflowed and incoming data has been lost. |
9903e566 CL |
76 | .El |
77 | .Sh SEE ALSO | |
78 | .Xr tty 4 | |
79 | .Sh HISTORY | |
80 | The | |
81 | .Nm | |
82 | driver | |
83 | .Ud | |
84 | .Sh BUGS | |
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85 | Data loss is possible on busy systems with baud rates greater than 300. |
86 | The | |
9903e566 | 87 | .Nm dca |
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88 | has never been tested with modem control enabled or on anything but the |
89 | built-in interface. |