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. 58.Bl -tag -width MOUSE 59.It Em KBD_RESETDELAY=X , KBD_MAXWAIT=Y 60The keyboard driver 61.Nm atkbd 62and the pointing device driver 63.Nm psm 64may ask the 65.Nm 66driver to reset these devices during the boot process. 67It sometimes takes a long time before these devices respond to 68the reset command. 69These options control how long the 70.Nm 71driver should 72wait before eventually giving up -- the driver will wait 73.Fa X 74* 75.Fa Y 76msecs at most. 77If the drivers seem unable to detect 78devices, you may want to increase these values. 79The default values are 80200 msec for 81.Fa X 82and 5 83for 84.Fa Y . 85.It Em KBDIO_DEBUG=N 86Sets the debug level to 87.Fa N . 88The default value is zero, which suppresses all debugging output. 89.El 90.\".Ss Driver Flags 91.\".Sh FILES 92.\".Sh EXAMPLE 93.\".Sh DIAGNOSTICS 94.\".Sh CAVEATS 95.\".Sh BUGS 96.Sh SEE ALSO 97.Xr atkbd 4 , 98.Xr psm 4 99.Sh HISTORY 100The 101.Nm 102driver first appeared in 103.Fx 3.1 . 104It is based on the kbdio module in 105.Fx 2.2 . 106.Sh AUTHORS 107The kbdio module, the 108.Nm 109driver and this manual page were written by 110.An Kazutaka Yokota Aq Mt yokota@FreeBSD.org . 111