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 driver
psm
.
There can be only one
atkbdc
device
configured in the system.
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 zero, 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⟩.