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ATKBD(4)		 BSD Kernel Interfaces Manual		      ATKBD(4)

NAME
     atkbd — the AT keyboard interface

SYNOPSIS
     options ATKBD_DFLT_KEYMAP
     makeoptions ATKBD_DFLT_KEYMAP=_keymap_name_
     options KBD_DISABLE_KEYMAP_LOAD
     device atkbd

     In /boot/device.hints:
     hint.atkbd.0.at="atkbdc"
     hint.atkbd.0.irq="1"

DESCRIPTION
     The atkbd driver, together with the atkbdc driver, provides access to the
     AT 84 keyboard or the AT enhanced keyboard which is connected to the AT
     keyboard controller.

     This driver is required for the console driver syscons(4).

     There can be only one atkbd device defined in the kernel configuration
     file.  This device also requires the atkbdc keyboard controller to be
     present.  The irq number must always be 1; there is no provision of
     changing the number.

   Function Keys
     The AT keyboard has a number of function keys.  They are numbered as fol‐
     lows and can be associated with strings by the kbdcontrol(1) command.
     You can use a keyboard map file (see kbdmap(5)) to map them to arbitrary
     keys, particularly the functions in the range from 65 to 96 which are not
     used by default.

     Function Key number  Function Key
     1, 2,...12		  F1, F2,... F12
     13, 14,...24	  Shift+F1, Shift+F2,... Shift+F12
     25, 26,...36	  Ctl+F1, Ctl+F2,... Ctl+F12
     37, 38,...48	  Shift+Ctl+F1, Shift+Ctl+F2,... Shift+Ctl+F12
     49			  Home and Numpad 7 (without NumLock)
     50			  Up Arrow and Numpad 8 (without NumLock)
     51			  Page Up and Numpad 9 (without NumLock)
     52			  Numpad -
     53			  Left Arrow and Numpad 4 (without NumLock)
     54			  Numpad 5 (without NumLock)
     55			  Right Arrow and Numpad 6 (without NumLock)
     56			  Numpad +
     57			  End and Numpad 1 (without NumLock)
     58			  Down Arrow and Numpad 2 (without NumLock)
     59			  Page Down and Numpad 3 (without NumLock)
     60			  Ins and Numpad 0 (without NumLock)
     61			  Del
     62			  Left GUI Key
     63			  Right GUI Key
     64			  Menu
     65, 66,...96	  free (not used by default)

     See the man page for the kbdcontrol(1) command for how to assign a string
     to the function key.

DRIVER CONFIGURATION
   Kernel Configuration Options
     The following kernel configuration options control the atkbd driver.

     ATKBD_DFLT_KEYMAP
		 This option sets the default, built-in keymap of the atkbd
		 driver to the named keymap.  See EXAMPLES below.

     KBD_DISABLE_KEYMAP_LOAD
		 The keymap can be modified by the kbdcontrol(1) command.
		 This option will disable this feature and prevent the user
		 from changing key assignment.

   Driver Flags
     The atkbd driver accepts the following driver flags.  They can be set
     either in /boot/device.hints, or else from within the boot loader (see
     loader(8)).

     bit 0 (FAIL_IF_NO_KBD)
	   By default the atkbd driver will install even if a keyboard is not
	   actually connected to the system.  This option prevents the driver
	   from being installed in this situation.

     bit 1 (NO_RESET)
	   When this option is given, the atkbd driver will not reset the key‐
	   board when initializing it.	It may be useful for laptop computers
	   whose function keys have special functions and these functions are
	   forgotten when the keyboard is reset.

     bit 2 (ALT_SCANCODESET)
	   Certain keyboards, such as those on some ThinkPad models, behave
	   like the old XT keyboard and require this option.

     bit 3 (NO_PROBE_TEST)
	   When this option is given, the atkbd driver will not test the key‐
	   board port during the probe routine.	 Some machines hang during
	   boot when this test is performed.

EXAMPLES
     The atkbd driver requires the keyboard controller atkbdc.	Thus, the ker‐
     nel configuration file should contain the following lines.

	   device atkbdc
	   device atkbd

     The following example shows how to set the default, built-in keymap to
     jp.106.kbd.

	   device atkbdc
	   options ATKBD_DFLT_KEYMAP
	   makeoptions ATKBD_DFLT_KEYMAP=jp.106
	   device atkbd

     In both cases, you also need to have following lines in
     /boot/device.hints.

	   hint.atkbdc.0.at="isa"
	   hint.atkbdc.0.port="0x060"
	   hint.atkbd.0.at="atkbdc"
	   hint.atkbd.0.irq="1"

SEE ALSO
     kbdcontrol(1), atkbdc(4), psm(4), syscons(4), kbdmap(5), loader(8)

HISTORY
     The atkbd driver first appeared in FreeBSD 3.1.

AUTHORS
     The atkbd driver was written by Søren Schmidt ⟨sos@FreeBSD.org⟩ and
     Kazutaka Yokota ⟨yokota@FreeBSD.org⟩.  This manual page was written by
     Kazutaka Yokota.

BSD			       January 29, 2008				   BSD
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