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+.\"	$OpenBSD: sis.4,v 1.35 2022/02/18 10:24:32 jsg Exp $
+.\"
+.\" Copyright (c) 1997, 1998, 1999
+.\"	Bill Paul <wpaul@ee.columbia.edu>. 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 Bill Paul.
+.\" 4. Neither the name of the author nor the names of any co-contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"   without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY Bill Paul 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 Bill Paul OR THE VOICES IN HIS HEAD
+.\" 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.
+.\"
+.\" $FreeBSD: src/share/man/man4/sis.4,v 1.2 1999/11/15 23:14:27 phantom Exp $
+.\"
+.Dd $Mdocdate: February 18 2022 $
+.Dt SIS 4
+.Os
+.Sh NAME
+.Nm sis
+.Nd SiS 900, SiS 7016, and NS DP83815/6 10/100 Ethernet device
+.Sh SYNOPSIS
+.Cd "sis* at pci?"
+.Cd "icsphy* at mii?"
+.Cd "nsphyter* at mii?"
+.Cd "rlphy* at mii?"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for PCI Ethernet adapters and embedded
+controllers based on the Silicon Integrated Systems SiS 900 /
+SiS 7016 Fast Ethernet controller chips, and National
+Semiconductor DP83815 (MacPHYTER) / DP83816 (MacPHYTER-II) PCI
+Ethernet controller chips, including the following:
+.Pp
+.Bl -bullet -compact
+.It
+@Nifty FNECHARD IFC USUP-TX
+.It
+MELCO LGY-PCI-TXC
+.It
+Netgear FA311, FA312, FA331
+.It
+Soekris Engineering lan1621, lan1641
+.El
+.Pp
+The SiS 900 is a 100Mbps Ethernet MAC and MII-compliant transceiver
+in a single package.
+It uses a bus master DMA and a scatter/gather descriptor scheme.
+The SiS 7016 is similar to the SiS 900 except that it has no internal PHY,
+requiring instead an external transceiver to be attached to its MII interface.
+The SiS 900 and SiS 7016 both have a 128-bit multicast hash filter
+and a single perfect filter entry for the station address.
+.Pp
+The NS DP83815 and DP83816 are also 100Mbps Ethernet MACs
+with integrated PHY.
+The NatSemi chips and the SiS chips share many of the same features and
+a fairly similar programming interface, and hence are supported
+by the same driver.
+.Pp
+The
+.Nm
+driver supports the following media types:
+.Bl -tag -width full-duplex
+.It autoselect
+Enable autoselection of the media type and options.
+The user can manually override
+the autoselected mode by adding media options to the
+.Xr hostname.if 5
+file.
+.It 10baseT
+Set 10Mbps operation.
+The
+.Ar mediaopt
+option can also be used to select either
+.Ar full-duplex
+or
+.Ar half-duplex
+modes.
+.It 100baseTX
+Set 100Mbps (Fast Ethernet) operation.
+The
+.Ar mediaopt
+option can also be used to select either
+.Ar full-duplex
+or
+.Ar half-duplex
+modes.
+.El
+.Pp
+The
+.Nm
+driver supports the following media options:
+.Bl -tag -width full-duplex
+.It full-duplex
+Force full duplex operation.
+.It half-duplex
+Force half duplex operation.
+.El
+.Pp
+For more information on configuring this device, see
+.Xr ifconfig 8 .
+.Sh DIAGNOSTICS
+.Bl -diag
+.It "sis0: couldn't map ports/memory"
+A fatal initialization error has occurred.
+.It "sis0: couldn't map interrupt"
+A fatal initialization error has occurred.
+.It "sis0: watchdog timeout"
+The device has stopped responding to the network, or there is a problem with
+the network connection (cable).
+.It "sis0: no memory for rx list"
+The driver failed to allocate an mbuf for the receiver ring.
+.It "sis0: no memory for tx list"
+The driver failed to allocate an mbuf for the transmitter ring when
+allocating a pad buffer or collapsing an mbuf chain into a cluster.
+.El
+.Sh SEE ALSO
+.Xr arp 4 ,
+.Xr icsphy 4 ,
+.Xr ifmedia 4 ,
+.Xr intro 4 ,
+.Xr netintro 4 ,
+.Xr nsphyter 4 ,
+.Xr pci 4 ,
+.Xr rlphy 4 ,
+.Xr hostname.if 5 ,
+.Xr ifconfig 8
+.Rs
+.%T SiS 900 and SiS 7016 datasheets
+.%U https://www.sis.com
+.Re
+.Rs
+.%T NatSemi DP83815 and DP83816 datasheets
+.Re
+.Sh HISTORY
+The
+.Nm
+device driver first appeared in
+.Fx 3.0 .
+.Ox
+support was added in
+.Ox 2.7 .
+.Sh AUTHORS
+.An -nosplit
+The
+.Nm
+driver was written by
+.An Bill Paul Aq Mt wpaul@ee.columbia.edu
+and ported to
+.Ox
+by
+.An Aaron Campbell Aq Mt aaron@openbsd.org .