.\" $NetBSD: intro.4,v 1.4 2017/02/17 22:19:00 christos Exp $
.\"
.\" Copyright (c) 1995 Mark Brinicombe
.\" Copyright (c) 1994 Christopher G. Demetriou
.\" All rights reserved.
.\"
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.\" modification, are permitted provided that the following conditions
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.\"    must display the following acknowledgement:
.\"      This product includes software developed by Christopher G. Demetriou.
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.Dd February 17, 2017
.Dt INTRO 4 acorn32
.Os
.Sh NAME
.Nm intro
.Nd introduction to acorn32 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 acorn32
(RiscPC) 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 acorn32/autoconf 4 .
A list of the supported devices is given below.
.Sh SEE ALSO
.Xr config 1 ,
.Xr acorn32/autoconf 4
.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 speaker -offset indent -compact
.It vidcvideo
VIDC20 device interface
.It com
NS8250-, NS16450-, and NS16550-based asynchronous serial
communications device interface
.It ea
Ether3/Ether5 podule device interface.
.It eb
EtherB network slot device interface.
.It eh
EtherH network slot device interface.
.It ie
Ether1 podule device interface.
.It lpt
Parallel port device interface
.It mem
Main memory interface
.It wd
Standard Internal RiscPC IDE device interface
.It fd
Standard Internal RiscPC floppy device interface
.It asc
Acorn SCSI I card device interface
.It csc
Cumana SCSI II card device interface
.It ptsc
Powertec SCSI II card device interface
.It oak
Oak SCSI I card device interface
.El
.Sh HISTORY
The
.Tn acorn32
.Nm intro
appeared in
.Nx 1.2 .