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.\"
.\" Copyright (c) 1999
.\" Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer as
.\" the first lines of this file unmodified.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
.\" $Id: atkbd.4,v 1.1 1999/02/07 05:40:14 yokota Exp $
.\"
.Dd February 9, 1999
.Dt ATKBD 4
.Os FreeBSD
.Sh NAME
.Nm atkbd
.Nd
the AT keyboard interface
.Sh SYNOPSIS
.Cd "device atkbd0 at isa? tty irq 1"
.Sh DESCRIPTION
The
.Nm
driver, together with the
.Nm atkbdc
driver, provides access to the AT 84 keyboard or the AT enhanced keyboard
which is connected to the AT keyboard controller.
.Pp
This driver is required for the console drivers
.Xr syscons 4
and
.Xr pcvt 4 .
.Pp
There can be only one
.Nm
device defined in the kernel configuration file. This device also
requires the
.Nm atkbdc
keyboard controller to be present.
The
.Em irq
number must always be 1; there is no provision of changing the number.
.Sh DRIVER CONFIGURATION
.\".Ss Kernel Configuration Options
.Ss Driver Flags
The
.Nm
driver accepts the following driver flags. They can be set either in the
kernel configuration file
.Pq see Xr config 8 ,
or else in the User Configuration Menu at boot time
.Pq see Xr boot 8 .
.Bl -tag -width FAIL
.It bit 0 (FAIL_IF_NO_KBD)
By default the
.Nm
driver will install even if a keyboard is not actually connected to the
system.
This option prevents the driver from being installed in this situation.
.It bit 1 (NO_RESET)
When this option is given, the
.Nm
driver will not reset the keyboard when initializing it.
It may be useful for laptop computers whose function keys
have special functions and these functions are forgotten when the
keyboard is reset.
.It bit 2 (ALT_SCANCODESET)
Certain keyboards, such as those on some ThinkPad models, behave
like the old XT keyboard and require this option.
.El
.\".Sh FILES
.\".Sh EXAMPLE
.\".Sh DIAGNOSTICS
.\".Sh CAVEATS
.\".Sh BUGS
.Sh SEE ALSO
.Xr atkbdc 4 ,
.Xr pcvt 4 ,
.Xr psm 4 ,
.Xr syscons 4 ,
.Xr boot 8 ,
.Xr config 8 .
.Sh HISTORY
The
.Nm
driver first appeared in
.Fx 3.1 .
.Sh AUTHORS
The
.Nm
driver was written by
.An Søren Schmidt Aq sos@FreeBSD.org
and
.An Kazutaka Yokota Aq yokota@FreeBSD.org .
This manual page was written by
.An Kazutaka Yokota .
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