NAME    [Toc]    [Back]

     atkbdc -- the AT keyboard controller interface

SYNOPSIS    [Toc]    [Back]

     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    [Toc]    [Back]

     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    [Toc]    [Back]

   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    [Toc]    [Back]

     atkbd(4), psm(4), config(8)

HISTORY    [Toc]    [Back]

     The atkbdc driver first appeared in FreeBSD 3.1.  It is based on the
     kbdio module in FreeBSD 2.2.

AUTHORS    [Toc]    [Back]

     The kbdio module, the atkbdc driver and this manual page were written by
     Kazutaka Yokota <yokota@FreeBSD.org>.


FreeBSD 5.2.1		       February 9, 1999 		 FreeBSD 5.2.1