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+.\"     $NetBSD: intro.4,v 1.6 2008/04/30 13:10:55 martin Exp $
+.\"
+.\" Copyright (c) 2003 The NetBSD Foundation, Inc.
+.\" 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.
+.\"
+.\" 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 April 29, 2003
+.Dt INTRO 4 arc
+.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 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 by
+.Nx Ns /arc .
+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 autoconf 4 .
+A list of the supported devices is given below.
+.Sh SEE ALSO
+.Xr config 1 ,
+.Xr autoconf 4
+.Sh HARDWARE
+.Nx Ns /arc
+supports a variety of systems conforming to the ARC machine
+specification.
+The following systems are supported:
+.Pp
+.Bl -tag -width XXXXXX -offset indent -compact
+.It Acer PICA
+.It DESKstation rPC44
+.It DESKstation Tyne
+.It MIPS Magnum 4000
+.It NEC Express 5800/230 PCI R4K
+.It NEC Express 5800/240 EISA R4K
+.It NEC Express RISCserver
+.It NEC ImageRISCstation
+.It NEC RISCserver 2200
+.It NEC RISCstation 2200 EISA
+.It NEC RISCstation 2200 PCI
+.It NEC RISCstation 2250
+.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 jazzisabr -offset indent -compact
+.It arcsisabr
+DESKstation rPC44 ISA host bridge
+.It jazzio
+Jazz internal bus host bridge
+.It jazzisabr
+Jazz ISA/EISA bus bridge
+.It necpb
+NEC RISCstation PCI host bridge
+.It tyneisabr
+DESKstation Tyne ISA host bridge
+.El
+.Pp
+The following devices on the Jazz internal bus are supported.
+.Pp
+.Bl -tag -width mcclock -offset indent -compact
+.It asc
+NCR 53c9x-based SCSI interface
+.It com
+NS16550-based serial communications interface
+.It fdc
+Floppy disk controller
+.It lpt
+Parallel port
+.It mcclock
+DS1287 real-time clock
+.It oosiop
+Symbios/NCR 53c700-based SCSI interface
+.It osiop
+Symbios/NCR 53c710-based SCSI interface
+.It pckbc
+PC keyboard controller
+.It sn
+SONIC Ethernet
+.It timer
+Interval timer
+.It vga
+VGA graphics
+.El
+.Pp
+PCI devices are supported through the
+.Xr pci 4
+bus and associated device drivers.
+.Pp
+ISA devices are supported through the
+.Xr isa 4
+bus and associated device drivers.
+.Pp
+.\"EISA devices are supported through the
+.\".Xr eisa 4
+.\"bus and associated device drivers.
+.\".Pp
+Console devices using ISA, Jazzio, or PCI video adaptors and standard AT
+or PS/2 keyboards are supported by the machine independent
+.Xr wscons 4
+console driver.
+.Sh UNSUPPORTED DEVICES
+The following devices are not supported, due to unavailability of
+either documentation or sample hardware:
+.Pp
+.Bl -tag -width XXXXXX -offset indent -compact
+.It AD1848 audio on Jazzio
+.It EISA devices
+.It VXL framebuffer on MIPS Magnum and RISCstation 2200 EISA
+.El
+.Sh HISTORY
+This
+.Tn arc
+.Nm intro
+appeared in
+.Nx 2.0 .
+.Sh BUGS
+DESKstation rPC44 and Tyne support is currently broken.