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+.\" $NetBSD: qt.4,v 1.2 2003/08/31 16:40:33 wiz Exp $
+.\"
+.\" Copyright (c) 2003 Anders Magnusson (ragge@ludd.luth.se).
+.\" 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. The name of the author may not be used to endorse or promote products
+.\" derived from this software without specific prior written permission
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+.\"
+.Dd August 30, 2003
+.Dt QT 4 vax
+.Os
+.Sh NAME
+.Nm qt
+.Nd
+.Tn DEC DELQA-PLUS (DELQA-YM)
+.Tn Q-bus
+10 Mb/s Ethernet interface
+.Sh SYNOPSIS
+.Cd "qt0 at uba? csr 174440"
+.Cd "qt1 at uba? csr 174460"
+.Sh DESCRIPTION
+The
+.Nm
+interface provides access to a 10 Mb/s Ethernet network through a
+.Tn DEC DELQA-YM
+.Tn Q-bus
+controller.
+.Pp
+Each of the host's network addresses
+is specified at boot time with an
+.Dv SIOCSIFADDR
+.Xr ioctl 2 .
+The
+.Nm
+interface employs the address resolution protocol described in
+.Xr arp 4
+to dynamically map between Internet and Ethernet addresses on the local
+network.
+.Sh DIAGNOSTICS
+.Bl -diag
+.It qt%d: chained packet.
+A packet received from the network was longer than the allowed max length
+and is therefore discarded.
+This is usually because a host on the local network is behaving badly.
+.El
+.Sh SEE ALSO
+.Xr arp 4 ,
+.Xr inet 4 ,
+.Xr netintro 4
+.Sh HISTORY
+The
+.Nm
+driver first appeared in
+.Bx 2.11 .
+It was later ported to
+.Nx 2.0 .