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