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+<table class="head">
+ <tr>
+ <td class="head-ltitle">SUPERIO(4)</td>
+ <td class="head-vol">Device Drivers Manual</td>
+ <td class="head-rtitle">SUPERIO(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">superio</code> &#x2014; <span class="Nd">Super
+ I/O controller and bus driver</span></p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1>
+<p class="Pp">To compile this driver into the kernel, place the following line
+ in your kernel configuration file:</p>
+<div class="Bd Pp Bd-indent"><code class="Cd">device superio</code></div>
+<p class="Pp">Alternatively, to load the driver as a module at boot time, place
+ the following line in <a class="Xr">loader.conf(5)</a>:</p>
+<div class="Bd Pp Bd-indent Li">
+<pre>superio_load=&quot;YES&quot;</pre>
+</div>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
+<p class="Pp">Super I/O is an I/O controller that combines various low-bandwidth
+ devices that can be functionally unrelated otherwise. A typical Super I/O
+ can contain devices such as</p>
+<p class="Pp"></p>
+<ul class="Bl-bullet Bl-compact">
+ <li>a floppy disk controller</li>
+ <li>a parallel port</li>
+ <li>a serial port</li>
+ <li>a PS/2 mouse and keyboard controller</li>
+ <li>a hardware monitoring controller</li>
+ <li>a watchdog timer</li>
+ <li>a controller for general purpose input-output</li>
+</ul>
+<p class="Pp">The <code class="Nm">superio</code> driver provides support for
+ devices residing in the Super I/O controller that can only be accessed or
+ discovered using the controller's interface. Some of the Super I/O devices
+ have standardized interfaces. Such devices either use well-known legacy
+ resources or they are advertised via ACPI or both. They can be configured
+ either using ISA bus hints or they are auto-configured by
+ <a class="Xr">acpi(4)</a>. The <code class="Nm">superio</code> driver is not
+ designed to interact with that kind of devices. They can be handled by their
+ respective drivers without any knowledge of the Super I/O specifics. For
+ instance, <a class="Xr">fdc(4)</a> provides access to the floppy disk
+ controller.</p>
+<p class="Pp">There are other Super I/O devices that do not have any
+ standardized interface. Drivers for those devices can be written using
+ facilities of the <code class="Nm">superio</code> driver.</p>
+<p class="Pp">The driver itself attaches to the ISA bus as all supported
+ controllers are accessed via LPC I/O ports.</p>
+<p class="Pp">The <code class="Nm">superio</code> driver is unusual as it is
+ both a controller driver for a variety of Super I/O controllers and a bus
+ driver for supported devices in those controllers.</p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="HARDWARE"><a class="permalink" href="#HARDWARE">HARDWARE</a></h1>
+<p class="Pp">The <code class="Nm">superio</code> driver supports a multitude of
+ Super I/O controllers produced by Nuvoton, formerly known as Winbond, and
+ ITE, namely:</p>
+<p class="Pp"></p>
+<ul class="Bl-bullet Bl-compact">
+ <li>Fintek F81803</li>
+ <li>Fintek F81865</li>
+ <li>Nuvoton NCT5104D/NCT6102D/NCT6106D rev. A and B+</li>
+ <li>Nuvoton NCT5585D</li>
+ <li>Nuvoton NCT6116D</li>
+ <li>Nuvoton NCT6775</li>
+ <li>Nuvoton NCT6776</li>
+ <li>Nuvoton NCT6779</li>
+ <li>Nuvoton NCT6791</li>
+ <li>Nuvoton NCT6792</li>
+ <li>Nuvoton NCT6793</li>
+ <li>Nuvoton NCT6795</li>
+ <li>Nuvoton NCT6796D-E</li>
+ <li>Winbond 83627HF/F/HG/G/S/THF/EHF/DHG/UHG/DHG-P</li>
+ <li>Winbond 83637HF</li>
+ <li>Winbond 83667HG/HG-B</li>
+ <li>Winbond 83687THF</li>
+ <li>Winbond 83697HF/UG</li>
+</ul>
+</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">superio(9)</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">superio</code> driver was written by
+ <span class="An">Andriy Gapon</span>
+ &lt;<a class="Mt" href="mailto:avg@FreeBSD.org">avg@FreeBSD.org</a>&gt;.</p>
+</section>
+</div>
+<table class="foot">
+ <tr>
+ <td class="foot-date">October 11, 2019</td>
+ <td class="foot-os">FreeBSD 15.0</td>
+ </tr>
+</table>