86 lines
2.7 KiB
Groff
86 lines
2.7 KiB
Groff
.\" Copyright (c) 1997 Luigi Rizzo
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd September 20, 2001
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.Dt PNP 4 i386
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.Os
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.Sh NAME
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.Nm pnp
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.Nd support for
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.Dq "Plug and Play"
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(PnP) ISA devices
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.Sh DESCRIPTION
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The
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.Nm
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driver enumerates ISA devices which support
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.Dq "Plug and Play ISA Specification"
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in the system.
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It assigns ISA bus resources (interrupt line, DMA channel, I/O ports,
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and memory region) to each device and activates it.
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.Pp
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If it cannot assign necessary resources to a PnP ISA device without
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causing conflict with other devices in the system,
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the device will not be activated and will be unavailable
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to programs.
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.Sh SEE ALSO
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.Xr pnpbios 4
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.Sh STANDARDS
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.Rs
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.%A Intel
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.%A Microsoft
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.%T "Plug and Play ISA Specification, Version 1.0a"
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.%D "May 5, 1994"
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.Re
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.Pp
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.Rs
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.%T "Clarifications to the Plug and Play ISA Specification, Version 1.0a"
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.%D "December 10, 1994"
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.Re
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.Sh HISTORY
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The
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.Nm
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driver first appeared in
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.Fx 2.2.5 .
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It has been substantially updated in subsequent versions.
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.Sh AUTHORS
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.An -nosplit
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PnP support was originally written
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for
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.Fx 2.2.5
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by
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.An Luigi Rizzo ,
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based on initial work done by
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.An Sujal Patel .
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.Sh CAVEATS
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It is not possible to disable individual PnP ISA devices.
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The
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.Nm
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driver will find all devices conforming the PnP ISA specification
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and try to activate them all.
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.Pp
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There is no way to explicitly assign particular resource to
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the PnP ISA device.
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The resource assignment is fully automatic and there is
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no provision for manual override.
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