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+<table class="head">
+ <tr>
+ <td class="head-ltitle">PNP(4)</td>
+ <td class="head-vol">Device Drivers Manual (i386)</td>
+ <td class="head-rtitle">PNP(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">pnp</code> &#x2014; <span class="Nd">support for
+ &#x201C;Plug and Play&#x201D; (PnP) ISA devices</span></p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
+<p class="Pp">The <code class="Nm">pnp</code> driver enumerates ISA devices
+ which support &#x201C;Plug and Play ISA Specification&#x201D; in the system.
+ It assigns ISA bus resources (interrupt line, DMA channel, I/O ports, and
+ memory region) to each device and activates it.</p>
+<p class="Pp">If it cannot assign necessary resources to a PnP ISA device
+ without causing conflict with other devices in the system, the device will
+ not be activated and will be unavailable to programs.</p>
+</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">pnpbios(4)</a></p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="STANDARDS"><a class="permalink" href="#STANDARDS">STANDARDS</a></h1>
+<p class="Pp"><cite class="Rs"><span class="RsA">Intel</span> and
+ <span class="RsA">Microsoft</span>, <span class="RsT">Plug and Play ISA
+ Specification, Version 1.0a</span>, <span class="RsD">May 5,
+ 1994</span>.</cite></p>
+<p class="Pp"><cite class="Rs"><span class="RsT">Clarifications to the Plug and
+ Play ISA Specification, Version 1.0a</span>, <span class="RsD">December 10,
+ 1994</span>.</cite></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">pnp</code> driver first appeared in
+ <span class="Ux">FreeBSD 2.2.5</span>. It has been substantially updated in
+ subsequent versions.</p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="AUTHORS"><a class="permalink" href="#AUTHORS">AUTHORS</a></h1>
+<p class="Pp">PnP support was originally written for <span class="Ux">FreeBSD
+ 2.2.5</span> by <span class="An">Luigi Rizzo</span>, based on initial work
+ done by <span class="An">Sujal Patel</span>.</p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="CAVEATS"><a class="permalink" href="#CAVEATS">CAVEATS</a></h1>
+<p class="Pp">It is not possible to disable individual PnP ISA devices. The
+ <code class="Nm">pnp</code> driver will find all devices conforming the PnP
+ ISA specification and try to activate them all.</p>
+<p class="Pp">There is no way to explicitly assign particular resource to the
+ PnP ISA device. The resource assignment is fully automatic and there is no
+ provision for manual override.</p>
+</section>
+</div>
+<table class="foot">
+ <tr>
+ <td class="foot-date">September 20, 2001</td>
+ <td class="foot-os">FreeBSD 15.0</td>
+ </tr>
+</table>