115 lines
3.2 KiB
Groff
115 lines
3.2 KiB
Groff
.\"
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.\" Copyright (c) 1999
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.\" Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer as
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.\" the first lines of this file unmodified.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd February 9, 1999
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.Dt ATKBDC 4
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.Os FreeBSD
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.Sh NAME
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.Nm atkbdc
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.Nd
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the AT keyboard controller interface
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.Sh SYNOPSIS
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.Cd "options KBD_RESETDELAY=N"
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.Cd "options KBD_MAXWAIT=N"
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.Cd "options KBDIO_DEBUG=N"
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.Cd "device atkbdc0 at isa? port IO_KBD"
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.Sh DESCRIPTION
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The keyboard controller
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.Nm
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provides I/O services for the AT keyboard and PS/2 mouse style
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pointing devices.
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This controller is required for the keyboard driver
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.Nm atkbd
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and the PS/2 pointing device driver
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.Nm psm .
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.Pp
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There can be only one
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.Nm
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device configured in the system.
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.Sh DRIVER CONFIGURATION
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.Ss Kernel Configuration Options
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The following kernel configuration options can be used to control the
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.Nm
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driver.
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They may be set in the kernel configuration file
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.Pq see Xr config 8 .
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.Bl -tag -width MOUSE
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.It Em KBD_RESETDELAY=X, KBD_MAXWAIT=Y
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The keyboard driver
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.Nm atkbd
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and the pointing device driver
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.Nm psm
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may ask the
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.Nm
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driver to reset these devices during the boot process.
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It sometimes takes a long time before these devices respond to
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the reset command.
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These options control how long the
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.Nm
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driver should
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wait before eventually giving up -- the driver will wait
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.Fa X
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*
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.Fa Y
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msecs at most.
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If the drivers seem unable to detect
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devices, you may want to increase these values.
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The default values are
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200 msec for
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.Fa X
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and 5
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for
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.Fa Y .
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.It Em KBDIO_DEBUG=N
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Sets the debug level to
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.Fa N .
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The default value is zero, which suppresses all debugging output.
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.El
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.\".Ss Driver Flags
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.\".Sh FILES
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.\".Sh EXAMPLE
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.\".Sh DIAGNOSTICS
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.\".Sh CAVEATS
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.\".Sh BUGS
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.Sh SEE ALSO
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.Xr atkbd 4 ,
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.Xr psm 4 ,
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.Xr config 8
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.Sh HISTORY
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The
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.Nm
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driver first appeared in
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.Fx 3.1 .
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It is based on the kbdio module in
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.Fx 2.2 .
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.Sh AUTHORS
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The kbdio module, the
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.Nm
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driver and this manual page were written by
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.An Kazutaka Yokota Aq yokota@FreeBSD.org .
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