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<li class="toctree-l1"><a class="reference internal" href="introduction.html">Introduction</a></li>
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<section id="squishy-the-scsi-multitool">
<h1>Squishy: The SCSI Multitool<a class="headerlink" href="#squishy-the-scsi-multitool" title="Link to this heading">¶</a></h1>
<figure class="align-right" style="width: 350px">
<img alt="_images/electrichearts_20220323A_sachi_trans.png" src="_images/electrichearts_20220323A_sachi_trans.png" />
</figure>
<p>This is the documentation for <a class="reference external" href="https://github.com/squishy-scsi/squishy">Squishy</a> and its supporting components, as well as a collection of guides and tutorials for the Squishy ecosystem.</p>
<section id="what-squishy-isn-t">
<h2>What Squishy Isn’t<a class="headerlink" href="#what-squishy-isn-t" title="Link to this heading">¶</a></h2>
<p>It’s important to detail what Squishy isn’t, as it differs a lot from other devices intended to interact with older SCSI systems.</p>
<p>Squishy is not <em>only</em> a disk emulator like the <a class="reference external" href="https://scsi.blue/">BlueSCSI</a> or the <a class="reference external" href="https://www.codesrc.com/mediawiki/index.php/SCSI2SD">SCSI2SD</a>. It is also not <em>only</em> a SCSI to USB Mass storage adapter.</p>
<p>Squishy is not a <em>specialized</em> device targeting only a single aspect of the SCSI ecosystem, nor targeting only a single platform.</p>
</section>
<section id="what-squishy-is">
<h2>What Squishy Is<a class="headerlink" href="#what-squishy-is" title="Link to this heading">¶</a></h2>
<p>Squishy is a platform, it allows you to accomplish almost any goal you wish to that involves a SCSI bus. It can do things as mundane as emulating a SCSI hard drive, but also you can use it to <a class="reference internal" href="applets/analyzer.html"><span class="std std-doc">sniff, analyze, and replay SCSI bus traffic</span></a>, or even boot a modern system from 9-track tape.</p>
<p>You can think of Squishy as being “Software Defined SCSI”, much like how a Software Defined Radio works with a hardware transceiver and a software ecosystem, Squishy provides the same, but for SCSI.</p>
<p>It is comprised of a <a class="reference internal" href="library/gateware/index.html"><span class="std std-doc">gateware</span></a> and <a class="reference internal" href="library/python/index.html"><span class="std std-doc">python</span></a> library as well as a <a class="reference internal" href="hardware/index.html"><span class="std std-doc">hardware</span></a> platform that acts as a bridge between the software and SCSI bus. Squishy allows for powerful and flexible control over all things SCSI, and using its <a class="reference internal" href="applets/index.html"><span class="std std-doc">powerful applet system</span></a> it gives that power to you.</p>
<p>For a more detailed introduction to Squishy and it’s components, see the <a class="reference internal" href="introduction.html"><span class="std std-doc">Introduction</span></a> section of the documentation. Then, when you’re ready visit the <a class="reference internal" href="getting_started.html"><span class="std std-doc">Getting Started</span></a> section to get up an running.</p>
<p>Squishy is entirely open source, and under permissive licenses. The full source code, gateware, firmware, and hardware designs are available on <a class="reference external" href="https://github.com/squishy-scsi/squishy">GitHub</a>.</p>
</section>
<section id="comparison">
<h2>Comparison<a class="headerlink" href="#comparison" title="Link to this heading">¶</a></h2>
<div class="table-wrapper colwidths-auto docutils container">
<table class="docutils align-default">
<thead>
<tr class="row-odd"><th class="head"><p></p></th>
<th class="head"><p><a class="reference external" href="https://github.com/squishy-scsi/squishy">Squishy</a></p></th>
<th class="head"><p><a class="reference external" href="https://scsi.blue/">BlueSCSI</a></p></th>
<th class="head"><p><a class="reference external" href="https://www.codesrc.com/mediawiki/index.php/SCSI2SD">SCSI2SD</a></p></th>
<th class="head"><p><a class="reference external" href="https://github.com/PiSCSI/piscsi">PiSCSI</a></p></th>
</tr>
</thead>
<tbody>
<tr class="row-even"><td><p>Has a cute mascot</p></td>
<td><p>Yes</p></td>
<td><p>No</p></td>
<td><p>No</p></td>
<td><p>No</p></td>
</tr>
<tr class="row-odd"><td><p>Device Emulation</p></td>
<td><p>Yes</p></td>
<td><p>Yes</p></td>
<td><p>Yes</p></td>
<td><p>Yes</p></td>
</tr>
<tr class="row-even"><td><p>Non-Storage Emulation</p></td>
<td><p>Yes</p></td>
<td><p>Yes<sup>1</sup></p></td>
<td><p>No</p></td>
<td><p>Yes<sup>2</sup></p></td>
</tr>
<tr class="row-odd"><td><p>Initiator Emulation</p></td>
<td><p>Yes</p></td>
<td><p>Yes</p></td>
<td><p>No</p></td>
<td><p>Yes<sup>2</sup></p></td>
</tr>
<tr class="row-even"><td><p>Passive Bus Tapping</p></td>
<td><p>Yes</p></td>
<td><p>No?</p></td>
<td><p>No</p></td>
<td><p>Yes</p></td>
</tr>
<tr class="row-odd"><td><p>Fully Open Source</p></td>
<td><p>Yes</p></td>
<td><p>Yes</p></td>
<td><p>No</p></td>
<td><p>No<sup>3</sup></p></td>
</tr>
<tr class="row-even"><td><p>SCSI-1 Support</p></td>
<td><p>Yes</p></td>
<td><p>Yes</p></td>
<td><p>No</p></td>
<td><p>No</p></td>
</tr>
<tr class="row-odd"><td><p>SCSI-2 Support</p></td>
<td><p>Yes</p></td>
<td><p>Yes</p></td>
<td><p>Yes</p></td>
<td><p>Yes</p></td>
</tr>
<tr class="row-even"><td><p>SCSI-3 Support</p></td>
<td><p>Yes</p></td>
<td><p>No</p></td>
<td><p>No</p></td>
<td><p>No</p></td>
</tr>
<tr class="row-odd"><td><p>HVD Support</p></td>
<td><p>Yes</p></td>
<td><p>No</p></td>
<td><p>No</p></td>
<td><p>No</p></td>
</tr>
<tr class="row-even"><td><p>LVD Support</p></td>
<td><p>Yes</p></td>
<td><p>No</p></td>
<td><p>No</p></td>
<td><p>No</p></td>
</tr>
<tr class="row-odd"><td><p>SE Support</p></td>
<td><p>Yes</p></td>
<td><p>Yes</p></td>
<td><p>Yes</p></td>
<td><p>Yes</p></td>
</tr>
<tr class="row-even"><td><p>Fastest Bus Speed</p></td>
<td><p>ULTRA320<sup>4,5</sup></p></td>
<td><p>FAST10</p></td>
<td><p>FAST10</p></td>
<td><p>FAST10?</p></td>
</tr>
<tr class="row-odd"><td><p>Standalone</p></td>
<td><p>No<sup>6</sup></p></td>
<td><p>Yes</p></td>
<td><p>Yes</p></td>
<td><p>Yes</p></td>
</tr>
<tr class="row-even"><td><p>Cost</p></td>
<td><p>?<sup>7</sup></p></td>
<td><p>~50USD</p></td>
<td><p>~98USD</p></td>
<td><p>~50USD<sup>8</sup></p></td>
</tr>
</tbody>
</table>
</div>
<p><small><strong>1:</strong> Only supports DaynaPORT emulation.</small></p>
<p><small><strong>2:</strong> PiSCSI allows you to write Linux userspace software via an API.</small></p>
<p><small><strong>3:</strong> The adapter board is Open Source, but the main compute element is not.</small></p>
<p><small><strong>4:</strong> Depends on the SCSI PHY Module and interface adapter.</small></p>
<p><small><strong>5:</strong> Only ULTRA320 SCSI speeds are guaranteed, however, depending on the silicon lottery ULTRA640 may be achievable.</small></p>
<p><small><strong>6:</strong> Squishy requires USB power for operation, therefore it is considered to always be tethered.</small></p>
<p><small><strong>7:</strong> Due to the hardware not being 100% complete an accurate cost is not available yet.</small></p>
<p><small><strong>8:</strong> This includes only the PiSCSI interface itself, and not the needed RaspberryPi SOM as well.</small></p>
</section>
<section id="community">
<h2>Community<a class="headerlink" href="#community" title="Link to this heading">¶</a></h2>
<p>Squishy has a dedicated IRC channel, <a class="reference external" href="https://web.libera.chat/#squishy">#squishy on libera.chat</a>. Join to ask questions, discuss ongoing development, or just hang out.</p>
<p>There are also <a class="reference external" href="https://github.com/squishy-scsi/squishy/discussions">GitHub Discussions</a> enabled on the repository if you have any questions or comments.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>Squishy does not have an official discord, nor any endorsed discord servers, for an explanation as to why, see the <a class="reference internal" href="faq.html"><span class="std std-doc">F.A.Q.</span></a></p>
</div>
</section>
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