.\"     $OpenBSD: epic.4,v 1.3 2005/07/27 23:27:35 brad Exp $
.\"
.\" Copyright (c) 1998 Jason L. Wright (jason@thought.net)
.\" All rights reserved.
.\"
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.\" modification, are permitted provided that the following conditions
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.\"
.Dd May 09, 2005
.Dt EPIC 4
.Os
.Sh NAME
.Nm epic
.Nd SMC 83C170 (EPIC/100) Ethernet driver
.Sh SYNOPSIS
.Cd "epic* at pci?"
.Cd "qsphy* at mii?"
.Sh DESCRIPTION
The
.Nm
interface provides access to the 10Mb/s and 100Mb/s Ethernet networks via the
.Tn SMC
.Tn EPIC
chipset.
This driver provides support for the
.Tn SMC
.Tn EtherPower II 10/100
Ethernet cards.
.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 6n -offset indent
.It media autoselect
Attempt to autoselect the media type (default)
.It media 100baseFX mediaopt full-duplex
Use 100baseFX (fiber), full duplex
.It media 100baseFX Op mediaopt half-duplex
Use 100baseFX (fiber), half duplex
.It media 100baseTX mediaopt full-duplex
Use 100baseTX, full duplex
.It media 100baseTX Op mediaopt half-duplex
Use 100baseTX, half duplex
.It media 100baseTX mediaopt loopback
Put the interface into loopback mode
.It media 10baseT mediaopt full-duplex
Use 10baseT, full duplex
.It media 10baseT Op mediaopt half-duplex
Use 10baseT, half duplex
.It media 10baseT mediaopt loopback
Put the interface into loopback mode
.El
.Sh SEE ALSO
.Xr arp 4 ,
.Xr ifmedia 4 ,
.Xr inet 4 ,
.Xr intro 4 ,
.Xr netintro 4 ,
.Xr pci 4 ,
.Xr qsphy 4 ,
.Xr hostname.if 5 ,
.Xr ifconfig 8
.Sh HISTORY
The
.Nm
device driver first appeared in
.Nx 1.4 .
.Ox
support was added in
.Ox 3.8 .
.Sh AUTHORS
The
.Nm
driver was written by
.An Jason R. Thorpe Aq thorpej@wasabisystems.com
and ported to
.Ox
by
.An Brad Smith Aq brad@openbsd.org .