rudimentary plug-and-play support

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+.\"	$OpenBSD: pnp.4,v 1.1 1996/08/14 15:09:12 shawn Exp $
+.\"
+.\" Copyright (c) 1996, Shawn Hsiao <shawn@alpha.secc.fju.edu.tw>
+.\" All rights reserved.
+.\"
+.\" Sujal M. Patel wrote initial codes for FreeBSD, and was ported to
+.\" OpenBSD and extended by Shawn Hsiao.
+.\"
+.\" 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 AUTHOR 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 AUTHOR 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 August 11, 1996
+.Dt pnp 4 i386
+.Os
+.Sh NAME
+.Nm pnp
+.Nd
+Plug-and-Play devices probing and attaching
+.Sh SYNOPSIS
+.Cd "pnp0 at isa?"
+.Sh DESCRIPTION
+The
+.Nm pnp
+driver provides probing and attaching support for those cards compliant
+with Plug and Play Specification V1.0a, published by Intel Corporation
+and Microsoft Corporation.
+.Pp
+To make a plug-and-play device probed and attached, the
+.Cm pnpid
+of the device needs to be known in advance, and described in the
+configuration file, e.g.
+.Pp
+.Cm "sb0	at isa? pnpid 0x31008c0e"
+.Pp
+or
+.Pp
+.Cm "ed0	at isa? pnpid 0x01228b11"
+.Pp
+The
+.Cm pnpid
+can be obtained by using
+.Xr pnpinfo 8
+utility.
+.Sh BUGS
+Many
+.Pp
+Memory descriptors are not yet supported, soon though.
+.Pp
+.Sh SEE ALSO
+.Xr pnpinfo 8 ,
+.Xr sb 4 ,
+.Xr ed 4
+.Sh HISTORY
+The
+.Nm pnp
+device driver appeared in
+.Ox 1.2 .