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.\" $OpenBSD: hme.4,v 1.2 2003/02/12 20:42:59 miod Exp $
.\"
.\" Copyright (c) 1998 Jason L. Wright (jason@thought.net)
.\" 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. All advertising materials mentioning features or use of this software
.\" must display the following acknowledgement:
.\" This product includes software developed by Jason L. Wright
.\" 4. 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 October 5, 2001
.Dt HME 4
.Os
.Sh NAME
.Nm hme
.Nd Sun Happy Meal Ethernet
.Sh SYNOPSIS
.Cd "hme* at pci? dev ? function ?"
.Cd "hme* at sbus? slot ? offset ?"
.Cd "nsphy* at mii? phy ?"
.Cd "qsphy* at mii? phy ?"
.Sh DESCRIPTION
The
.Nm
interface provides access to the 10Mb/s and 100Mb/s Ethernet networks via the
.Tn National
DP83840
Ethernet 10/100 Mb/s Physical Layer
or the
.Tn Quality
QS6612
Ethernet MII Transceiver for Category 5 Twisted Pair Cable
chip sets.
The
.Nm
is found on the SunSwift and Sun QuadFastEthernet boards.
.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.
.Pp
When a
.Nm
interface is brought up, by default, it will attempt to auto-negotiate the
link speed and duplex.
The speeds, in order of attempt, are:
100Mb/s Full Duplex, 100Mb/s Half Duplex, 10 Mb/s Full Duplex, and
10 Mb/s Half Duplex.
.Pp
The
.Nm
supports several media types, which are selected via the
.Xr ifconfig 8
command.
The supported media types are:
.Bl -tag -width "media autoselect" -offset indent
.It media autoselect
Attempt to autoselect the media type (default)
.It media 100baseTX mediaopt full-duplex
Use 100baseTX, full duplex
.It media 100baseTX Op mediaopt half-duplex
Use 100baseTX, half duplex
.It media 10baseT mediaopt full-duplex
Use 10baseT, full duplex
.It media 10baseT Op mediaopt half-duplex
Use 10baseT, half duplex
.El
.Sh SEE ALSO
.Xr arp 4 ,
.Xr be 4 ,
.Xr ie 4 ,
.Xr ifmedia 4 ,
.Xr inet 4 ,
.Xr intro 4 ,
.Xr le 4 ,
.Xr netintro 4 ,
.Xr qe 4 ,
.Xr sbus 4 ,
.Xr hostname.if 5 ,
.Xr ifconfig 8
.Sh HISTORY
.Ox
support for the
.Nm
first appeared in
.Ox 2.4 .
.Sh CAVEATS
The
.Nm
sbus cards will not function in a sun4c class machine,
due to PROM limitations.
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