static/freebsd/man4/atkbdc.4 3.html


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<table class="head">
  <tr>
    <td class="head-ltitle">ATKBDC(4)</td>
    <td class="head-vol">Device Drivers Manual</td>
    <td class="head-rtitle">ATKBDC(4)</td>
  </tr>
</table>
<div class="manual-text">
<section class="Sh">
<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1>
<p class="Pp"><code class="Nm">atkbdc</code> &#x2014; <span class="Nd">the AT
    keyboard controller interface</span></p>
</section>
<section class="Sh">
<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1>
<p class="Pp"><code class="Cd">options KBD_RESETDELAY=N</code>
  <br/>
  <code class="Cd">options KBD_MAXWAIT=N</code>
  <br/>
  <code class="Cd">options KBD_DELAY1=N</code>
  <br/>
  <code class="Cd">options KBD_DELAY2=N</code>
  <br/>
  <code class="Cd">options KBDIO_DEBUG=N</code>
  <br/>
  <code class="Cd">device atkbdc</code></p>
<p class="Pp">In <span class="Pa">/boot/device.hints</span>:
  <br/>
  <code class="Cd">hint.atkbdc.0.at=&quot;isa&quot;</code>
  <br/>
  <code class="Cd">hint.atkbdc.0.port=&quot;0x060&quot;</code></p>
</section>
<section class="Sh">
<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
<p class="Pp">The keyboard controller <code class="Nm">atkbdc</code> provides
    I/O services for the AT keyboard and PS/2 mouse style pointing devices. This
    controller is required for the keyboard driver <code class="Nm">atkbd</code>
    and the PS/2 pointing device driver <code class="Nm">psm</code>.</p>
<p class="Pp">There can be only one <code class="Nm">atkbdc</code> device
    configured in the system.</p>
</section>
<section class="Sh">
<h1 class="Sh" id="DRIVER_CONFIGURATION"><a class="permalink" href="#DRIVER_CONFIGURATION">DRIVER
  CONFIGURATION</a></h1>
<section class="Ss">
<h2 class="Ss" id="Kernel_Configuration_Options"><a class="permalink" href="#Kernel_Configuration_Options">Kernel
  Configuration Options</a></h2>
<p class="Pp">The following kernel configuration options can be used to control
    the <code class="Nm">atkbdc</code> driver. They may be set in the kernel
    configuration file (see <a class="Xr">config(8)</a>).</p>
<dl class="Bl-tag">
  <dt id="KBD_RESETDELAY=X"><a class="permalink" href="#KBD_RESETDELAY=X"><i class="Em">KBD_RESETDELAY=X</i></a>,
    <a class="permalink" href="#KBD_MAXWAIT=Y"><i class="Em" id="KBD_MAXWAIT=Y">KBD_MAXWAIT=Y</i></a></dt>
  <dd>The keyboard driver <code class="Nm">atkbd</code> and the pointing device
      driver <code class="Nm">psm</code> may ask the
      <code class="Nm">atkbdc</code> 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
      <code class="Nm">atkbdc</code> driver should wait before eventually giving
      up -- the driver will wait <var class="Fa">X</var> *
      <var class="Fa">Y</var> 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 <var class="Fa">X</var> and 5 for
      <var class="Fa">Y</var>.</dd>
  <dt id="KBD_DELAY1=X,"><a class="permalink" href="#KBD_DELAY1=X,"><i class="Em">KBD_DELAY1=X,
    KBD_DELAY2=Y</i></a></dt>
  <dd>DELAY1 sets the initial key repeat delay to <var class="Fa">X</var>. The
      default value is 500ms. DELAY2 sets the key repeat delay to
      <var class="Fa">Y</var>. The default value is 100ms.</dd>
  <dt id="KBDIO_DEBUG=N"><a class="permalink" href="#KBDIO_DEBUG=N"><i class="Em">KBDIO_DEBUG=N</i></a></dt>
  <dd>Sets the debug level to <var class="Fa">N</var>. The default value is
      zero, which suppresses all debugging output.</dd>
</dl>
</section>
</section>
<section class="Sh">
<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE
  ALSO</a></h1>
<p class="Pp"><a class="Xr">atkbd(4)</a>, <a class="Xr">psm(4)</a>,
    <a class="Xr">config(8)</a></p>
</section>
<section class="Sh">
<h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1>
<p class="Pp">The <code class="Nm">atkbdc</code> driver first appeared in
    <span class="Ux">FreeBSD 3.1</span>. It is based on the kbdio module in
    <span class="Ux">FreeBSD 2.2</span>.</p>
</section>
<section class="Sh">
<h1 class="Sh" id="AUTHORS"><a class="permalink" href="#AUTHORS">AUTHORS</a></h1>
<p class="Pp">The kbdio module, the <code class="Nm">atkbdc</code> driver and
    this manual page were written by <span class="An">Kazutaka Yokota</span>
    &lt;<a class="Mt" href="mailto:yokota@FreeBSD.org">yokota@FreeBSD.org</a>&gt;.</p>
</section>
</div>
<table class="foot">
  <tr>
    <td class="foot-date">February 26, 2023</td>
    <td class="foot-os">FreeBSD 15.0</td>
  </tr>
</table>