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 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.Pq see Xr config 8 . 60.Bl -tag -width MOUSE 61.It Em KBD_RESETDELAY=X , KBD_MAXWAIT=Y 62The keyboard driver 63.Nm atkbd 64and the pointing device driver 65.Nm psm 66may ask the 67.Nm 68driver to reset these devices during the boot process. 69It sometimes takes a long time before these devices respond to 70the reset command. 71These options control how long the 72.Nm 73driver should 74wait before eventually giving up -- the driver will wait 75.Fa X 76* 77.Fa Y 78msecs at most. 79If the drivers seem unable to detect 80devices, you may want to increase these values. 81The default values are 82200 msec for 83.Fa X 84and 5 85for 86.Fa Y . 87.It Em KBDIO_DEBUG=N 88Sets the debug level to 89.Fa N . 90The default value is zero, which suppresses all debugging output. 91.El 92.\".Ss Driver Flags 93.\".Sh FILES 94.\".Sh EXAMPLE 95.\".Sh DIAGNOSTICS 96.\".Sh CAVEATS 97.\".Sh BUGS 98.Sh SEE ALSO 99.Xr atkbd 4 , 100.Xr psm 4 , 101.Xr config 8 102.Sh HISTORY 103The 104.Nm 105driver first appeared in 106.Fx 3.1 . 107It is based on the kbdio module in 108.Fx 2.2 . 109.Sh AUTHORS 110The kbdio module, the 111.Nm 112driver and this manual page were written by 113.An Kazutaka Yokota Aq yokota@FreeBSD.org . 114