131 lines
4.1 KiB
Groff
131 lines
4.1 KiB
Groff
.\" Copyright (c) 1990, 1991 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.
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by the University of
|
|
.\" California, Berkeley and its contributors.
|
|
.\" 4. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" from: @(#)dcl.4 5.2 (Berkeley) 3/27/91
|
|
.\" $Id: dcl.4,v 1.2 1993/08/01 07:56:35 mycroft Exp $
|
|
.\"
|
|
.Dd March 27, 1991
|
|
.Dt DCL 4 hp300
|
|
.Os
|
|
.Sh NAME
|
|
.Nm dcl
|
|
.Nd
|
|
.Tn HP
|
|
98628A communications link
|
|
.Sh SYNOPSIS
|
|
.Cd "device dcl0 at scode? flags 0x1"
|
|
.Sh DESCRIPTION
|
|
The 98628A is a buffered
|
|
.Tn EIA
|
|
.Tn RS-232C
|
|
.Pf ( Tn CCITT
|
|
.Tn V.28 )
|
|
communications interface.
|
|
It has one port with full modem control.
|
|
.Pp
|
|
Input and output for each line may set to one of following baud rates;
|
|
0, 50, 75, 110, 134.5, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
|
|
9600, 19200.
|
|
.Pp
|
|
An optional argument
|
|
.Ar flags
|
|
may be set to 1 if the line should be treated as hard-wired with
|
|
carrier always present, or to 0 if modem control is desired.
|
|
.Pp
|
|
Use
|
|
.Tn HP
|
|
cable "98626 & 98628 opts.002,
|
|
.Tn RS232-C
|
|
.Tn DCE CABLE ,
|
|
5061-4216" to attach non-modem devices.
|
|
Use
|
|
.Tn HP
|
|
cable "98626 & 98628 opts.001,
|
|
.Tn RS232-C
|
|
.Tn DTE CABLE ,
|
|
5061-4215" to attach modems.
|
|
.Pp
|
|
The 98628A has a 256 byte input silo and a 256 output silo. Input interrupts
|
|
happen on a per character basis.
|
|
.Pp
|
|
The high water and low water marks in the kernel tty routines are completely
|
|
inappropriate for a device like this with a large input buffer. Don't use
|
|
tandem mode if possible. A fast system can handle input at 19.2K baud without
|
|
receive overflow.
|
|
.Pp
|
|
For output to devices that make heavy use of
|
|
.Tn XON/XOFF
|
|
a write size of less
|
|
then 256 will improve performance marginally.
|
|
.Sh FILES
|
|
.Bl -tag -width /dev/ttyl[0-9] -compact
|
|
.It Pa /dev/ttyl[0-9]
|
|
.El
|
|
.Sh DIAGNOSTICS
|
|
.Bl -diag
|
|
.It dcl%d: error 0x%x RESET CARD.
|
|
Where the errors are encoded:
|
|
.Bd -unfilled -offset indent
|
|
0x06 card failure
|
|
0x0d uart receive overflow
|
|
0x0e receive overflow
|
|
0x0f missing external clock
|
|
0x10 cts false too long
|
|
0x11 lost carrier
|
|
0x12 activity timeout
|
|
0x13 connection not established
|
|
0x19 illegal databits/parity
|
|
0x1a register address out of range
|
|
0x1b register value out of range
|
|
0x-- unknown error
|
|
.Ed
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr tty 4
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
driver
|
|
.Ud
|
|
.Sh BUGS
|
|
Breaks received at a faster rate then 1 break every second will be
|
|
recognized as a single break.
|
|
.Pp
|
|
Console use is not supported.
|
|
.Pp
|
|
The
|
|
.Tn RS-422/423/499 ,
|
|
.Tn MTS-DSN/DL
|
|
modes of the card are not supported.
|