atkbdc(4)

NAME

atkbdc - the AT keyboard controller interface

SYNOPSIS

options KBD_RESETDELAY=N
options KBD_MAXWAIT=N
options KBDIO_DEBUG=N
device atkbdc
In /boot/device.hints:
hint.atkbdc.0.at="isa"
hint.atkbdc.0.port="0x060"

DESCRIPTION

The keyboard controller atkbdc provides I/O services for the

AT keyboard
and PS/2 mouse style pointing devices. This controller is

required for
the keyboard driver atkbd and the PS/2 pointing device driv

er psm.

There can be only one atkbdc device configured in the sys

tem.

DRIVER CONFIGURATION

Kernel Configuration Options

The following kernel configuration options can be used to

control the
atkbdc driver. They may be set in the kernel configuration

file (see
config(8)).

KBD_RESETDELAY=X, KBD_MAXWAIT=Y

The keyboard driver atkbd and the pointing device

driver psm may
ask the atkbdc driver to reset these devices during

the boot process. It sometimes takes a long time before these

devices respond
to the reset command. These options control how long

the atkbdc
driver should wait before eventually giving up -- the

driver will
wait X * Y msecs at most. If the drivers seem unable

to detect
devices, you may want to increase these values. The

default values are 200 msec for X and 5 for Y.

KBDIO_DEBUG=N

Sets the debug level to N. The default value is ze

ro, which suppresses all debugging output.

SEE ALSO

atkbd(4), psm(4), config(8)

HISTORY

The atkbdc driver first appeared in FreeBSD 3.1. It is

based on the
kbdio module in FreeBSD 2.2.

AUTHORS

The kbdio module, the atkbdc driver and this manual page

were written by
Kazutaka Yokota <yokota@FreeBSD.org>.

BSD February 9, 1999

BSD