1.\" pnp(4) - manual page for PnP device support 2.\" 3.\" 4.\" Copyright (c) 1997 Luigi Rizzo 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgements: 16.\" This product includes software developed by Luigi Rizzo. 17.\" 4. The name of the author may not be used to endorse or promote products 18.\" derived from this software without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30.\" 31.\" $FreeBSD$ 32.\" 33.Dd September 20, 2001 34.Dt PNP 4 i386 35.Os 36.Sh NAME 37.Nm pnp 38.Nd support for ``Plug and Play'' (PnP) ISA devices 39.\" .Sh SYNOPSIS 40.Sh DESCRIPTION 41The 42.Nm 43driver enumerates ISA devices which support 44``Plug and Play ISA Specification'' in the system. 45It assigns ISA bus resources (interrupt line, DMA channel, I/O ports, 46and memory region) to each device and activates it. 47.Pp 48If it cannot assign necessary resources to a PnP ISA device without 49causing conflict with other devices in the system, 50the device will not be activated and will be unavailable 51to programs. 52.Pp 53.Sh CAVEAT 54It is not possible to disable individual PnP ISA devices. 55The 56.Nm 57driver will find all devices conforming the PnP ISA specification 58and try to activate them all. 59.Pp 60There is no way to explicitly assign particular resource to 61the PnP ISA device. 62The resource assignment is fully automatic and there is 63no provision for manual override. 64.Sh SEE ALSO 65.Xr pnpbios 4 66.Pp 67.Sh STANDARDS 68.Rs 69.%A Intel 70.%A Microsoft 71.%T ``Plug and Play ISA Specification, Version 1.0a'' 72.%D May 5, 1994 73.Re 74.Pp 75.Rs 76.%T ``Clarifications to the Plug and Play ISA Specification, Version 1.0a'' 77.%D December 10, 1994 78.Re 79.Sh AUTHORS 80PnP support was originally written 81for 82.Fx 2.2.5 83by 84.An Luigi Rizzo , 85based on initial work done by 86.An Sujal Patel . 87.Sh HISTORY 88The 89.Nm 90driver first appeared in 91.Fx 2.2.5 . 92It has been substantially updated in subsequent versions. 93