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-<table class="head">
- <tr>
- <td class="head-ltitle">WDSC(4)</td>
- <td class="head-vol">Device Drivers Manual (mvme68k)</td>
- <td class="head-rtitle">WDSC(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">wdsc</code> &#x2014; <span class="Nd">Western
- Digital WD33c93 SCSI Bus Interface Controller</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">wdsc0 at pcc? ipl 2</code></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">wdsc</code> driver provides an abstraction
- layer between the SCSI hardware fitted to the Motorola MVME147 single board
- computer (WD33C93), and the machine independent SCSI drivers described in
- <a class="Xr">scsibus(4)</a>.</p>
-<p class="Pp">In addition to sending the required SCSI commands to target
- devices on the SCSI bus, the <code class="Nm">wdsc</code> driver deals with
- DMA, device interrupts, sync/async negotiation and target
- disconnects/reconnects.</p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="DIAGNOSTICS"><a class="permalink" href="#DIAGNOSTICS">DIAGNOSTICS</a></h1>
-<p class="Pp">Too many to mention.</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">mvme68k/pcc(4)</a>, <a class="Xr">scsibus(4)</a></p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="BUGS"><a class="permalink" href="#BUGS">BUGS</a></h1>
-<p class="Pp">Negotiation of Synchronous SCSI data transfers has been
- deliberately disabled in the MVME147's <code class="Nm">wdsc</code> driver
- as it has proved extremely difficult to make it work reliably in this
- mode.</p>
-<p class="Pp">The <code class="Nm">wdsc</code> driver does not respond well to
- exceptional conditions caused by poor SCSI cabling and/or termination. In
- those instances the machine is likely to require a hard reset to
- recover.</p>
-<p class="Pp">The current <code class="Nm">wdsc</code> driver should be blown
- away and replaced with a machine independent version.</p>
-</section>
-</div>
-<table class="foot">
- <tr>
- <td class="foot-date">February 17, 2017</td>
- <td class="foot-os">NetBSD 10.1</td>
- </tr>
-</table>