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.\" 12.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 13.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 14.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 15.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 16.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 17.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 18.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 19.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 20.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 21.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 22.\" 23.Dd September 20, 2001 24.Dt PNP 4 i386 25.Os 26.Sh NAME 27.Nm pnp 28.Nd support for 29.Dq "Plug and Play" 30(PnP) ISA devices 31.Sh DESCRIPTION 32The 33.Nm 34driver enumerates ISA devices which support 35.Dq "Plug and Play ISA Specification" 36in the system. 37It assigns ISA bus resources (interrupt line, DMA channel, I/O ports, 38and memory region) to each device and activates it. 39.Pp 40If it cannot assign necessary resources to a PnP ISA device without 41causing conflict with other devices in the system, 42the device will not be activated and will be unavailable 43to programs. 44.Sh SEE ALSO 45.Xr pnpbios 4 46.Sh STANDARDS 47.Rs 48.%A Intel 49.%A Microsoft 50.%T "Plug and Play ISA Specification, Version 1.0a" 51.%D "May 5, 1994" 52.Re 53.Pp 54.Rs 55.%T "Clarifications to the Plug and Play ISA Specification, Version 1.0a" 56.%D "December 10, 1994" 57.Re 58.Sh HISTORY 59The 60.Nm 61driver first appeared in 62.Fx 2.2.5 . 63It has been substantially updated in subsequent versions. 64.Sh AUTHORS 65.An -nosplit 66PnP support was originally written 67for 68.Fx 2.2.5 69by 70.An Luigi Rizzo , 71based on initial work done by 72.An Sujal Patel . 73.Sh CAVEATS 74It is not possible to disable individual PnP ISA devices. 75The 76.Nm 77driver will find all devices conforming the PnP ISA specification 78and try to activate them all. 79.Pp 80There is no way to explicitly assign particular resource to 81the PnP ISA device. 82The resource assignment is fully automatic and there is 83no provision for manual override. 84