NAME
atkbdc —
the AT keyboard controller
interface
SYNOPSIS
options KBD_RESETDELAY=N
options KBD_MAXWAIT=N
options KBDIO_DEBUG=N
device atkbdc0 at isa? port IO_KBD
DESCRIPTION
The keyboard controlleratkbdc 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
atkbdand the pointing device driverpsmmay ask theatkbdcdriver 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 theatkbdcdriver 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
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>.