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>.