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+.\"-
+.\" Copyright (c) 2001 The NetBSD Foundation, Inc.
+.\" All rights reserved.
+.\"
+.\" This code is derived from software contributed to The NetBSD Foundation
+.\" by Paul Kranenburg.
+.\"
+.\" 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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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: OpenBSD: sbus.4,v 1.27 2005/03/05 01:44:48 miod Exp
+.\"	from: NetBSD: sbus.4,v 1.5 2002/01/21 17:54:10 wiz Exp
+.\" $FreeBSD$
+.\"
+.Dd September 1, 2006
+.Dt SBUS 4 sparc64
+.Os
+.Sh NAME
+.Nm sbus
+.Nd SBus controller and bus
+.Sh SYNOPSIS
+.Cd "device sbus"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for the SBus controllers and busses found in older
+.Tn UltraSPARC
+workstations and small to medium server class systems.
+The SBus is an I/O interconnect bus supporting both on-board peripherals and
+extension boards.
+The SBus specifications define the bus protocol as well as the electrical and
+mechanical properties of the extension slots.
+.Sh SEE ALSO
+.Xr auxio 4 ,
+.Xr eeprom 4 ,
+.Xr esp 4 ,
+.Xr hme 4 ,
+.Xr isp 4 ,
+.Xr le 4 ,
+.Xr scc 4 ,
+.Xr snd_audiocs 4 ,
+.Xr uart 4
+.Sh HISTORY
+The
+.Nm
+driver first appeared in
+.Nx 1.3 .
+The first
+.Fx
+version to include it was
+.Fx 5.0 .
+.Sh AUTHORS
+.An -nosplit
+The
+.Nm
+driver was written by
+.An "Paul Kranenburg"
+and ported to
+.Fx
+by
+.An "Thomas Moestl" Aq tmm@FreeBSD.org .