xref: /freebsd/share/man/man4/atkbdc.4 (revision 0957b409)
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2.\" Copyright (c) 1999
3.\" Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
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27.\" $FreeBSD$
28.\"
29.Dd February 9, 1999
30.Dt ATKBDC 4
31.Os
32.Sh NAME
33.Nm atkbdc
34.Nd the AT keyboard controller interface
35.Sh SYNOPSIS
36.Cd "options KBD_RESETDELAY=N"
37.Cd "options KBD_MAXWAIT=N"
38.Cd "options KBDIO_DEBUG=N"
39.Cd "device atkbdc"
40.Pp
41In
42.Pa /boot/device.hints :
43.Cd hint.atkbdc.0.at="isa"
44.Cd hint.atkbdc.0.port="0x060"
45.Sh DESCRIPTION
46The keyboard controller
47.Nm
48provides I/O services for the AT keyboard and PS/2 mouse style
49pointing devices.
50This controller is required for the keyboard driver
51.Nm atkbd
52and the PS/2 pointing device driver
53.Nm psm .
54.Pp
55There can be only one
56.Nm
57device configured in the system.
58.Sh DRIVER CONFIGURATION
59.Ss Kernel Configuration Options
60The following kernel configuration options can be used to control the
61.Nm
62driver.
63They may be set in the kernel configuration file
64(see
65.Xr config 8 ) .
66.Bl -tag -width MOUSE
67.It Em KBD_RESETDELAY=X , KBD_MAXWAIT=Y
68The keyboard driver
69.Nm atkbd
70and the pointing device driver
71.Nm psm
72may ask the
73.Nm
74driver to reset these devices during the boot process.
75It sometimes takes a long time before these devices respond to
76the reset command.
77These options control how long the
78.Nm
79driver should
80wait before eventually giving up -- the driver will wait
81.Fa X
82*
83.Fa Y
84msecs at most.
85If the drivers seem unable to detect
86devices, you may want to increase these values.
87The default values are
88200 msec for
89.Fa X
90and 5
91for
92.Fa Y .
93.It Em KBDIO_DEBUG=N
94Sets the debug level to
95.Fa N .
96The default value is zero, which suppresses all debugging output.
97.El
98.\".Ss Driver Flags
99.\".Sh FILES
100.\".Sh EXAMPLE
101.\".Sh DIAGNOSTICS
102.\".Sh CAVEATS
103.\".Sh BUGS
104.Sh SEE ALSO
105.Xr atkbd 4 ,
106.Xr psm 4 ,
107.Xr config 8
108.Sh HISTORY
109The
110.Nm
111driver first appeared in
112.Fx 3.1 .
113It is based on the kbdio module in
114.Fx 2.2 .
115.Sh AUTHORS
116The kbdio module, the
117.Nm
118driver and this manual page were written by
119.An Kazutaka Yokota Aq Mt yokota@FreeBSD.org .
120