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+.\"	$NetBSD: sbus.4,v 1.11 2021/03/11 16:53:14 nia Exp $
+.\"
+.\" 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.
+.\"
+.Dd September 6, 2018
+.Dt SBUS 4
+.Os
+.Sh NAME
+.Nm SBus
+.Nd introduction to machine-independent SBus bus support and drivers
+.Sh SYNOPSIS
+.Cd "sbus* at mainbus?"
+.Cd "sbus* at iommu?"
+.Cd "sbus* at xbox?"
+.Pp
+These
+.Nm
+attachments are specific to the
+.Nx Ns /sparc
+and
+.Nx Ns /sparc64
+ports.
+.Sh DESCRIPTION
+.Nm
+is a I/O interconnect bus mostly found in
+.Tn SPARC
+workstations and small to medium server class systems.
+It supports both on-board peripherals and extension boards.
+The
+.Nm
+specifications define the bus protocol as well as the electrical and
+mechanical properties of the extension slots.
+.Sh HARDWARE
+.Nx
+includes machine-independent
+.Nm
+drivers, sorted by device type and driver name:
+.Ss SCSI interfaces
+.Bl -tag -width xxxxxxxxxx -offset indent
+.It Xr esp 4
+NCR53c94 and compatible
+.Tn SCSI
+interfaces.
+.It Xr isp 4
+Qlogic
+.Tn SCSI
+interfaces.
+.El
+.Ss Network interfaces
+.Bl -tag -width xxxxxxxxxx -offset indent
+.It Xr le 4
+.Tn Lance
+7990 series
+.Tn Ethernet
+interfaces.
+.It Xr hme 4
+.Dq Happy Meal
+.Tn Ethernet
+interfaces.
+.It Xr be 4
+.Dq Big Mac
+.Tn Ethernet
+board.
+.It Xr qe 4
+Quad Ethernet Controller
+board.
+.El
+.Ss Bridges
+.Bl -tag -width xxxxxxxxxx -offset indent
+.It Xr xbox 4
+an
+.Nm Sbus
+expansion box.
+.El
+.Ss Graphics devices
+.Bl -tag -width xxxxxxxxxx -offset indent
+.It Xr bwtwo 4
+framebuffer device.
+.It Xr cgthree 4
+framebuffer device.
+.It Xr cgsix 4
+framebuffer device.
+.It Xr pnozz 4
+framebuffer device.
+.It Xr tcx 4
+framebuffer device.
+.It Xr zx 4
+framebuffer device.
+.El
+.Ss Audio devices
+.Bl -tag -width xxxxxxxxxx -offset indent
+.It Xr audiocs 4
+CS4231 codec.
+.El
+.Ss Serial interfaces
+.Bl -tag -width xxxxxxxxxx -offset indent
+.It Xr magma 4
+Magma Serial/Parallel combo device.
+.El
+.Ss Floppy interfaces
+.Bl -tag -width xxxxxxxxxx -offset indent
+.It Xr fdc 4
+Floppy disk controller
+.El
+.Sh SEE ALSO
+.Xr intro 4
+.Sh HISTORY
+The machine-independent
+.Nm SBus
+subsystem appeared in
+.Nx 1.3 .