1.\" $NetBSD: pnpbios.4,v 1.16 2021/03/12 10:48:29 nia Exp $ 2.\" 3.\" Copyright (c) 1999-2002 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to The NetBSD Foundation 7.\" by Lennart Augustsson. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28.\" POSSIBILITY OF SUCH DAMAGE. 29.\" 30.Dd February 17, 2017 31.Dt PNPBIOS 4 i386 32.Os 33.Sh NAME 34.Nm pnpbios 35.Nd introduction to PnP BIOS support 36.Sh SYNOPSIS 37.Cd "pnpbios0 at mainbus?" 38.Cd "XX* at pnpbios0 index ?" 39.Pp 40.Cd options PNPBIOSVERBOSE 41.Cd options PNPBIOSDEBUG 42.Sh INTRODUCTION 43.Nm 44provides support for finding and attaching devices by 45extracting information from the PnP BIOS of a machine. 46.Sh SUPPORTED DEVICES 47.Nx 48includes the following 49.Nm 50drivers, sorted by driver name: 51.Pp 52.Bl -tag -width x86/fdc(4) -offset indent -compact 53.It Xr com 4 54serial communications interface 55.It Xr ess 4 56ESS Technology AudioDrive family audio device driver 57.It Xr x86/fdc 4 58floppy controller 59.It Xr joy 4 60game controller 61.It Xr x86/lpt 4 62parallel port driver 63.It Xr pciide 4 64PCI IDE controllers driver 65.It Xr pckbc 4 66PC keyboard/mouse controller 67.It Xr sb 4 68SoundBlaster family audio device driver 69.It Xr wss 4 70Windows Sound System hardware driver 71.It Xr ym 4 72Yamaha OPL3-SA3 sound driver 73.El 74.Sh SEE ALSO 75.Xr i386/intro 4 , 76.Xr isa 4 , 77.Xr pci 4 78.Sh HISTORY 79The 80.Nm 81driver 82appeared in 83.Nx 1.5 . 84.Sh BUGS 85The 86.Nm 87bus provides a different way to attach devices than the real buses 88(e.g., 89.Xr isa 4 ) . 90The reason to use 91.Nm 92instead of the real bus is that some machines have weird routings 93of, e.g., interrupts. 94The exact information about these things can 95be found in the BIOS, which is why the 96.Nm 97bus has a better chance of succeeding with getting it right. 98.Pp 99Many older BIOS implementations do not support PnP, 100and some newer ones do not follow the standards. 101