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: src/share/man/man4/atkbdc.4,v 1.9.2.4 2001/08/17 13:08:37 ru Exp $ 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 atkbdc0 at isa? port IO_KBD" 40.Sh DESCRIPTION 41The keyboard controller 42.Nm 43provides I/O services for the AT keyboard and PS/2 mouse style 44pointing devices. 45This controller is required for the keyboard driver 46.Nm atkbd 47and the PS/2 pointing device driver 48.Nm psm . 49.Pp 50There can be only one 51.Nm 52device configured in the system. 53.Sh DRIVER CONFIGURATION 54.Ss Kernel Configuration Options 55The following kernel configuration options can be used to control the 56.Nm 57driver. 58They may be set in the kernel configuration file 59(see 60.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. 80If the drivers seem unable to detect 81devices, you may want to increase these values. 82The default values are 83200 msec for 84.Fa X 85and 5 86for 87.Fa Y . 88.It Em KBDIO_DEBUG=N 89Sets the debug level to 90.Fa N . 91The default value is zero, which suppresses all debugging output. 92.El 93.\".Ss Driver Flags 94.\".Sh FILES 95.\".Sh EXAMPLE 96.\".Sh DIAGNOSTICS 97.\".Sh CAVEATS 98.\".Sh BUGS 99.Sh SEE ALSO 100.Xr atkbd 4 , 101.Xr psm 4 , 102.Xr config 8 103.Sh HISTORY 104The 105.Nm 106driver first appeared in 107.Fx 3.1 . 108It is based on the kbdio module in 109.Fx 2.2 . 110.Sh AUTHORS 111The kbdio module, the 112.Nm 113driver and this manual page were written by 114.An Kazutaka Yokota Aq Mt yokota@FreeBSD.org . 115