1.\" 2.\" Copyright (c) 1999 3.\" Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp> 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer as 11.\" the first lines of this file unmodified. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26.\" 27.\" $FreeBSD$ 28.\" 29.Dd February 9, 1999 30.Dt ATKBDC 4 31.Os FreeBSD 32.Sh NAME 33.Nm atkbdc 34.Nd 35the AT keyboard controller interface 36.Sh SYNOPSIS 37.Cd "options KBD_RESETDELAY=N" 38.Cd "options KBD_MAXWAIT=N" 39.Cd "options KBDIO_DEBUG=N" 40.Cd "device atkbdc0 at isa? port IO_KBD" 41.Sh DESCRIPTION 42The keyboard controller 43.Nm 44provides I/O services for the AT keyboard and PS/2 mouse style 45pointing devices. 46This controller is required for the keyboard driver 47.Nm atkbd 48and the PS/2 pointing device driver 49.Nm psm . 50.Pp 51There can be only one 52.Nm 53device configured in the system. 54.Sh DRIVER CONFIGURATION 55.Ss Kernel Configuration Options 56The following kernel configuration options can be used to control the 57.Nm 58driver. 59They may be set in the kernel configuration file 60.Pq see Xr config 8 . 61.Bl -tag -width MOUSE 62.It Em KBD_RESETDELAY=X, KBD_MAXWAIT=Y 63The keyboard driver 64.Nm atkbd 65and the pointing device driver 66.Nm psm 67may ask the 68.Nm 69driver to reset these devices during the boot process. 70It sometimes takes a long time before these devices respond to 71the reset command. 72These options control how long the 73.Nm 74driver should 75wait before eventually giving up -- the driver will wait 76.Fa X 77* 78.Fa Y 79msecs at most. If the drivers seem unable to detect 80devices, you may want to increase these values. The default values are 81200 msec for 82.Fa X 83and 5 84for 85.Fa Y . 86.It Em KBDIO_DEBUG=N 87Sets the debug level to 88.Fa N . 89The default value is zero, which suppresses all debugging output. 90.El 91.\".Ss Driver Flags 92.\".Sh FILES 93.\".Sh EXAMPLE 94.\".Sh DIAGNOSTICS 95.\".Sh CAVEATS 96.\".Sh BUGS 97.Sh SEE ALSO 98.Xr atkbd 4 , 99.Xr psm 4 , 100.Xr config 8 . 101.Sh HISTORY 102The 103.Nm 104driver first appeared in 105.Fx 3.1 . 106It is based on the kbdio module in 107.Fx 2.2 . 108.Sh AUTHORS 109The kbdio module, the 110.Nm 111driver and this manual page were written by 112.An Kazutaka Yokota Aq yokota@FreeBSD.org . 113