.\" Copyright (c) 1986, 1991 Regents of the University of California.
.\" 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 the University of
.\"	California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\"    may be used to endorse or promote products derived from this software
.\"    without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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: @(#)intro.4	6.5 (Berkeley) 3/27/91
.\"	$Id: intro.4,v 1.2 1993/08/01 07:36:50 mycroft Exp $
.\"
.Dd March 27, 1991
.Dt INTRO 4 tahoe
.Os
.Sh NAME
.Nm intro
.Nd introduction to 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 8
program.
The
.Tn DIAGNOSTICS
section lists messages which may appear on the console
and in the system error log
.Pa /var/log/messages
due to errors in device operation.
.Sh CCI DEVICE SUPPORT
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 physio 4
and
.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
on the
.Tn VERSAbus
and, if found, enable the software
support for it.  If a
.Tn VERSAbus
device does not respond at autoconfiguration
time it is not accessible at any time afterwards.  To
enable a
.Tn VERSAbus
device which did not autoconfigure, the system will have to
be rebooted.
.Pp
The autoconfiguration system is described in
.Xr autoconf 4 .
.Sh SEE ALSO
.Xr autoconf 4 ,
.Xr netintro 4 ,
.Xr config 8
.Sh LIST OF DEVICES
The devices listed below are supported in this incarnation of
the system.  Devices are indicated by their functional interface.
If second vendor products provide functionally identical interfaces
they should be usable with the supplied software.
.Bf Sy
(Beware however that we promise the software works
ONLY with the hardware indicated on the appropriate manual page.)
.Ef
.Pp
.Bl -column cons
ace	ACC 10 Mb/s Ethernet controller
cons	Tahoe console interface
cy	Cypher tape drive interface
dr	Ikon DR-11W controller
enp	3Com 10 Mb/s Ethernet controller
ik	Evans and Sutherland PS300 interface through an Ikon DR-11W
	controller
vd	CCI vd mass storage disk controller
vx	CCI vioc terminal multiplexor
.El
.Sh HISTORY
The section 4
.Nm
appeared in
.Bx 4.2 .