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+.\" Copyright (c) 1997 Luigi Rizzo
+.\"
+.\" 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 ``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.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd September 20, 2001
+.Dt PNP 4 i386
+.Os
+.Sh NAME
+.Nm pnp
+.Nd support for
+.Dq "Plug and Play"
+(PnP) ISA devices
+.Sh DESCRIPTION
+The
+.Nm
+driver enumerates ISA devices which support
+.Dq "Plug and Play ISA Specification"
+in the system.
+It assigns ISA bus resources (interrupt line, DMA channel, I/O ports,
+and memory region) to each device and activates it.
+.Pp
+If it cannot assign necessary resources to a PnP ISA device without
+causing conflict with other devices in the system,
+the device will not be activated and will be unavailable
+to programs.
+.Sh SEE ALSO
+.Xr pnpbios 4
+.Sh STANDARDS
+.Rs
+.%A Intel
+.%A Microsoft
+.%T "Plug and Play ISA Specification, Version 1.0a"
+.%D "May 5, 1994"
+.Re
+.Pp
+.Rs
+.%T "Clarifications to the Plug and Play ISA Specification, Version 1.0a"
+.%D "December 10, 1994"
+.Re
+.Sh HISTORY
+The
+.Nm
+driver first appeared in
+.Fx 2.2.5 .
+It has been substantially updated in subsequent versions.
+.Sh AUTHORS
+.An -nosplit
+PnP support was originally written
+for
+.Fx 2.2.5
+by
+.An Luigi Rizzo ,
+based on initial work done by
+.An Sujal Patel .
+.Sh CAVEATS
+It is not possible to disable individual PnP ISA devices.
+The
+.Nm
+driver will find all devices conforming the PnP ISA specification
+and try to activate them all.
+.Pp
+There is no way to explicitly assign particular resource to
+the PnP ISA device.
+The resource assignment is fully automatic and there is
+no provision for manual override.