[src/uebayasi-xip]: src/share/man/man4/man4.vax Fix time travel. (See previou...

[reed <reed%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/cd9e2f724117
branches:  uebayasi-xip
changeset: 751643:cd9e2f724117
user:      reed <reed%NetBSD.org@localhost>
date:      Tue Apr 06 02:30:41 2010 +0000

description:
Fix time travel. (See previous line and previous revision.)

diffstat:

 share/man/man4/man4.vax/dhu.4 |  110 ++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 110 insertions(+), 0 deletions(-)

diffs (114 lines):

diff -r 6613fd02d225 -r cd9e2f724117 share/man/man4/man4.vax/dhu.4
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/share/man/man4/man4.vax/dhu.4     Tue Apr 06 02:30:41 2010 +0000
@@ -0,0 +1,110 @@
+.\"    $NetBSD: dhu.4,v 1.14.2.2 2010/04/06 02:30:41 reed Exp $
+.\"
+.\" Copyright (c) 1985, 1991, 1993
+.\"    The Regents of the University of California.  All rights reserved.
+.\"
+.\" 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. 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: @(#)dhu.4        8.1 (Berkeley) 6/5/93
+.\"
+.Dd June 5, 1993
+.Dt DHU 4 vax
+.Os
+.Sh NAME
+.Nm dhu
+.Nd
+.Tn DHU-11/DHV-11
+serial communications multiplexer
+.Sh SYNOPSIS
+.Cd "dhu0 at uba0 csr 0160440"
+.Sh DESCRIPTION
+A
+.Tn DHU-11
+provides 16 communication lines.
+.Pp
+Normal I/O
+control parameters for individual lines are managed by
+.Xr ioctl 2
+calls.
+Individual
+.Tn DHU-11
+lines may be configured to run at any of 13 speeds
+(50, 200 and 38400 baud are not available);
+the speed may be set via
+.Xr getty 8
+or
+.Xr stty 1
+or may be communicated by other programs which
+use
+.Xr ioctl 2
+such as
+.Xr ifconfig 8 ,
+see
+.Xr tty 4 .
+.Pp
+The
+.Tn DHU-11
+driver normally uses input silos
+and delays receiver interrupts by 20 milliseconds
+rather than taking an interrupt on each input character.
+.Sh FILES
+.Bl -tag -width /dev/tty[S-Z][0-9a-f]xx -compact
+.It Pa /dev/tty[S-Z][0-9a-f]
+.El
+.Sh NOTES
+The driver currently does not make full use of the hardware
+capabilities of the
+.Tn DHU-11 ,
+for dealing with
+.Tn XON/XOFF
+flow-control or hard-wired
+lines for example.
+.Pp
+Although the devices are not the same, a
+.Tn DHU-11
+can convince the
+.Tn DH-11
+autoconfiguration code that it is a
+.Tn DH-11 .
+.Pp
+The 4 40-way cables are a pain.
+.Sh SEE ALSO
+.Xr tty 4
+.Sh HISTORY
+The
+.Nm
+driver appeared in
+.Bx 4.3 .
+.Pp
+A new
+.Nm
+driver showed up in
+.Nx 1.2 .
+.Sh BUGS
+Even if the
+.Nm
+hardware supports
+.Tn DMA ,
+the driver cannot make use of this capability.