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+<table class="head">
+ <tr>
+ <td class="head-ltitle">CSS(4)</td>
+ <td class="head-vol">Device Drivers Manual (vax)</td>
+ <td class="head-rtitle">CSS(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">css</code> &#x2014; <span class="Nd">DEC IMP-11A
+ LH/DH IMP network 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">pseudo-device imp device css0 at uba0 csr 167600
+ flags 10 vector cssrint cssxint</code></p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
+<p class="Pp">NOTE: At the moment, <span class="Ux">NetBSD</span> does not
+ support IMP, so this manual page is not relevant.</p>
+<p class="Pp" id="pseudo-device">The <code class="Nm">css</code> device provides
+ a Local Host/Distant Host interface to an IMP. It is normally used when
+ participating in the DARPA Internet. The controller itself is not accessible
+ to users, but instead provides the hardware support to the IMP interface
+ described in <a class="Xr">imp(4)</a>. The configuration entry for the
+ <a class="Xr">imp(4)</a> must also include the
+ <a class="permalink" href="#pseudo-device"><i class="Em">pseudo-device</i></a>
+ as shown above.</p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="DIAGNOSTICS"><a class="permalink" href="#DIAGNOSTICS">DIAGNOSTICS</a></h1>
+<dl class="Bl-diag">
+ <dt>css%d: not alive.</dt>
+ <dd>The initialization routine was entered even though the device did not
+ autoconfigure. This is indicates a system problem.</dd>
+ <dt>css%d: can't initialize.</dt>
+ <dd>Insufficient UNIBUS resources existed to initialize the device. This is
+ likely to occur when the device is run on a buffered data path on an
+ 11/750 and other network interfaces are also configured to use buffered
+ data paths, or when it is configured to use buffered data paths on an
+ 11/730 (which has none).</dd>
+ <dt>css%d: imp doesn't respond, icsr=%b.</dt>
+ <dd>The driver attempted to initialize the device, but the IMP failed to
+ respond after 500 tries. Check the cabling.</dd>
+ <dt>css%d: stray output interrupt csr=%b.</dt>
+ <dd>An interrupt occurred when no output had previously been started.</dd>
+ <dt>css%d: output error, ocsr=%b icsr=%b.</dt>
+ <dd>The device indicated a problem sending data on output.</dd>
+ <dt>css%d: recv error, csr=%b.</dt>
+ <dd>The device indicated a problem receiving data on input.</dd>
+ <dt>css%d: bad length=%d.</dt>
+ <dd>An input operation resulted in a data transfer of less than 0 or more than
+ 1008 bytes of data into memory (according to the word count register).
+ This should never happen as the maximum size of a host-IMP message is 1008
+ bytes.</dd>
+</dl>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1>
+<p class="Pp">The <code class="Nm">css</code> interface appeared in
+ <span class="Ux">4.2BSD</span>.</p>
+</section>
+</div>
+<table class="foot">
+ <tr>
+ <td class="foot-date">June 5, 1993</td>
+ <td class="foot-os">NetBSD 10.1</td>
+ </tr>
+</table>