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+<table class="head">
+  <tr>
+    <td class="head-ltitle">LPT(4)</td>
+    <td class="head-vol">Device Drivers Manual</td>
+    <td class="head-rtitle">LPT(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">lpt</code> &#x2014; <span class="Nd">generic
+    printer device driver</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">device ppc</code>
+  <br/>
+  <code class="Cd">device ppbus</code>
+  <br/>
+  <code class="Cd">device lpt</code></p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
+<p class="Pp">The current
+    <a class="permalink" href="#lpt"><i class="Em" id="lpt">lpt</i></a> driver
+    is the port of the original lpt driver to the <a class="Xr">ppbus(4)</a>
+    system.</p>
+<p class="Pp">One purpose of this port was to allow parallel port sharing with
+    other parallel devices. Secondly, inb()/outb() calls have been replaced by
+    ppbus function calls. lpt is now arch-independent thanks to the ppbus
+    interface. See <a class="Xr">ppbus(4)</a> for more info about the ppbus
+    system.</p>
+<p class="Pp">The parallel port bus is allocated by lpt when the printer device
+    is opened and released only when the transfer is completed: either when the
+    device is closed or when the entire buffer is sent in interrupt driven
+  mode.</p>
+<p class="Pp">The driver can be configured to be either interrupt-driven, or to
+    poll the printer. Ports that are configured to be interrupt-driven can be
+    switched to polled mode by using the <a class="Xr">lptcontrol(8)</a>
+    command.</p>
+<p class="Pp">Depending on your hardware, extended capabilities may be
+    configured with the <a class="Xr">lptcontrol(8)</a> command. With an ECP/ISA
+    port, you can take advantage of FIFO and DMA.</p>
+<p class="Pp">In order to retrieve printer info from /dev/lpt0, just apply the
+    <code class="Nm">cat</code> command to the device. If the printer supports
+    IEEE1284 nibble mode and has data to send to the host, you will get it.</p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="FILES"><a class="permalink" href="#FILES">FILES</a></h1>
+<dl class="Bl-tag Bl-compact">
+  <dt><span class="Pa">/dev/lpt0</span></dt>
+  <dd>first parallel port driver</dd>
+</dl>
+</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">ppbus(4)</a>, <a class="Xr">ppc(4)</a>,
+    <a class="Xr">lptcontrol(8)</a></p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1>
+<p class="Pp">This driver replaces the functionality of the lpa driver, which is
+    now defunct.</p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="BUGS"><a class="permalink" href="#BUGS">BUGS</a></h1>
+<p class="Pp">There are lots of them, especially in cheap parallel port
+    implementations.</p>
+<p class="Pp">It is only possible to open a lpt port when a printer is connected
+    and on-line, making it impossible to run <a class="Xr">lptcontrol(8)</a>
+    when there is no printer connected.</p>
+<p class="Pp">This driver could still stand a rewrite.</p>
+</section>
+</div>
+<table class="foot">
+  <tr>
+    <td class="foot-date">February 14, 1999</td>
+    <td class="foot-os">FreeBSD 15.0</td>
+  </tr>
+</table>