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+.\"	$NetBSD: obio.4,v 1.10 2018/03/30 14:21:04 wiz Exp $
+.\"
+.\" Copyright (c) 2003 Alex Zepeda <zipzippy@sonic.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 Alex Zepeda.
+.\" 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 March 30, 2018
+.Dt OBIO 4 macppc
+.Os
+.Sh NAME
+.Nm obio
+.Nd introduction to Macintosh On-Board IO bus support and drivers
+.Sh SYNOPSIS
+.Cd "obio0 at pci? dev ? function ?"
+.Sh DESCRIPTION
+The
+.Nm
+interface serves as an abstraction used by the autoconfiguration
+system to help find and attach devices (e.g. the Ethernet or disk
+controllers) connected to the Macintosh onboard I/O bus.
+.Sh HARDWARE
+.Nx
+includes machine-dependent On-Board drivers, sorted by device type and driver name:
+.Ss SCSI interfaces
+.Bl -tag -width burgundy -offset indent
+.It esp
+NCR 53C9x SCSI interfaces.
+.It mesh
+Apple Macintosh Enhanced SCSI Hardware SCSI interfaces.
+.El
+.Ss Disk and tape controllers
+.Bl -tag -width burgundy -offset indent
+.It wdc
+Standard IDE/ATAPI type hard drive controllers.
+.It mediabay
+Standard IDE/ATAPI type CD-ROM drive controllers in PowerBooks.
+.El
+.Ss Network interfaces
+.Bl -tag -width burgundy -offset indent
+.It bm
+Apple BMac ethernet interface.
+.It mc
+Apple MACE ethernet interface.
+.It gem
+GMAC ethernet interface.
+.It wi
+WaveLAN/IEEE and PRISM-II 802.11 wireless interfaces.
+.El
+.Ss Serial interfaces
+.Bl -tag -width burgundy -offset indent
+.It zsc
+Zilog 8530 serial communications interfaces.
+.El
+.Ss Audio devices
+.Bl -tag -width burgundy -offset indent
+.It awacs
+Apple's
+.Sq "audio waveform amplifier and converter for sound"
+audio device found on most macppc models.
+.El
+.Ss Miscellaneous devices
+.Bl -tag -width burgundy -offset indent
+.It adb
+Apple Desktop Bus for keyboards, mice, and other input devices.
+.It nvram
+Placeholder device for the persistent system settings.
+.El
+.Sh SEE ALSO
+.Xr adb 4 ,
+.Xr esp 4 ,
+.Xr gem 4 ,
+.Xr macppc/autoconf 4 ,
+.Xr macppc/awacs 4 ,
+.Xr macppc/bm 4 ,
+.Xr macppc/intro 4 ,
+.Xr macppc/mesh 4 ,
+.Xr mc 4 ,
+.\" .Xr mediabay 4 ,
+.Xr wdc 4 ,
+.Xr wi 4 ,
+.Xr zsc 4
+.Sh HISTORY
+.Nm
+first appeared in
+.Nx 1.2 .