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>.

Debian                                          February 9, 1999                                       ATKBDC(4)