xref: /freebsd/share/man/man4/man4.i386/pnpbios.4 (revision 39beb93c3f8bdbf72a61fda42300b5ebed7390c8)
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3.\" Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
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27.\" $FreeBSD$
28.Dd September 20, 2001
29.Dt PNPBIOS 4 i386
30.Os
31.Sh NAME
32.Nm pnpbios
33.Nd support for embedded devices on the motherboard
34.Sh DESCRIPTION
35The
36.Nm
37driver enumerates embedded ISA devices on the motherboard whose BIOS
38supports
39.Dq "Plug and Play BIOS Specification" .
40It assigns ISA bus resources (interrupt line, DMA channel, I/O ports,
41and memory region) to each device and activates it.
42.Pp
43If it cannot assign necessary resources to a device without
44causing conflict with other devices in the system,
45the device will not be activated and will be unavailable
46to programs.
47.Sh CAVEATS
48There is no explicit way to disable individual embedded devices.
49The
50.Nm
51driver will find all devices reported by the
52.Dq "Plug and Play (PnP)"
53BIOS and try to activate them all.
54.Pp
55There is no way to explicitly assign particular resource to a device.
56The resource assignment is fully automatic and there is
57no provision for manual override.
58.Sh SEE ALSO
59.Xr pnp 4
60.Sh STANDARDS
61.Rs
62.%A Compaq
63.%A Phenix
64.%A Intel
65.%T "Plug and Play BIOS Specification Version 1.0A"
66.%D May 5, 1994
67.Re
68.Pp
69.Rs
70.%A Compaq
71.%A Phenix
72.%A Intel
73.%T "Plug and Play BIOS CLARIFICATION Paper for Plug and Play BIOS Specification Version 1.0A"
74.%D October 6, 1994
75.Re
76.Sh HISTORY
77The
78.Nm
79driver first appeared in
80.Fx 4.0 .
81.Sh AUTHORS
82The
83.Nm
84driver was written by
85.An Mike Smith .
86