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+.\"
+.\" Copyright (c) 1996 Jonathan Stone.
+.\" 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 Jonathan Stone.
+.\" 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.
+.\"
+.\"	$NetBSD: intro.4,v 1.7 2017/02/18 22:39:01 wiz Exp $
+.\"
+.Dd February 17, 2017
+.Dt INTRO 4 sun2
+.Os
+.Sh NAME
+.Nm intro
+.Nd introduction to sun2 special files and hardware support
+.Sh DESCRIPTION
+This section describes the special files, related driver functions,
+and networking support
+available in the system.
+In this part of the manual, the
+.Tn SYNOPSIS
+section of
+each configurable device gives a sample specification
+for use in constructing a system description for the
+.Xr config 1
+program.
+The
+.Tn DIAGNOSTICS
+section lists messages which may appear on the console
+and/or in the system error log
+.Pa /var/log/messages
+due to errors in device operation;
+see
+.Xr syslogd 8
+for more information.
+.Pp
+This section contains both devices
+which may be configured into the system
+and network related information.
+The networking support is introduced in
+.Xr netintro 4 .
+.Sh DEVICE SUPPORT
+This section describes the hardware supported on the Sun2
+platform.
+Software support for these devices comes in two forms.  A hardware
+device may be supported with a character or block
+.Em device driver ,
+or it may be used within the networking subsystem and have a
+.Em network interface driver .
+Block and character devices are accessed through files in the file
+system of a special type; see
+.Xr mknod 8 .
+Network interfaces are indirectly accessed through the interprocess
+communication facilities provided by the system; see
+.Xr socket 2 .
+.Pp
+A hardware device is identified to the system at configuration time
+and the appropriate device or network interface driver is then compiled
+into the system.  When the resultant system is booted, the
+autoconfiguration facilities in the system probe for the device
+and, if found, enable the software support for it.
+If a device does not respond at autoconfiguration
+time it is not accessible at any time afterwards.
+To enable a device which did not autoconfigure,
+the system must be rebooted.
+.Pp
+The autoconfiguration system is described in
+.Xr sun2/autoconf 4 .
+A list of the supported devices is given below.
+.Sh SEE ALSO
+.Xr config 1 ,
+.Xr cd 4 ,
+.Xr sd 4 ,
+.Xr ss 4 ,
+.Xr st 4 ,
+.Xr sun2/autoconf 4
+.Sh SUPPORTED SYSTEMS
+The following Sun2 system architectures and models are supported:
+.Bl -tag -width eeprom
+.It sun2
+Sun2 systems: (MC68010)
+.br
+Sun 2/120, 2/170 (10 MHz)
+.br
+.El
+.Sh LIST OF DEVICES
+The devices listed below are supported in this incarnation of
+the system.  Devices are indicated by their functional interface.
+Not all supported devices are listed.
+.Pp
+.Bl -tag -width eeprom
+.It bwtwo
+black and white obio frame buffer
+.It ie
+Intel 82586 Ethernet controller (Sun 2/120, 2/170)
+.It ec
+3Com 3c400 Multibus Ethernet controller (Sun 2/120, 2/170)
+.It kbd
+Sun type 2, type 3, type 4, and type 5 keyboards (on zstty)
+.It ms
+Sun mouse (on zstty)
+.It sc
+Sun "SCSI-2" Multibus SCSI controller
+.It zs
+Zilog 8530 serial controller
+.El
+.Sh HISTORY
+This
+.Tn sun2
+.Nm intro
+appeared in
+.Nx 1.6 .
+Large chunks of text carefully recycled (shamelessly appropriated)
+from
+.Nx Ns /sun3
+.Xr sun2/intro 4 .