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<title>2006/birken - EDAMAME Award</title>
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<meta name="description" content="2006 IOCCC entry birken - EDAMAME Award">
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<div class="header">
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<img src="../../png/ioccc.png" alt="IOCCC image by Matt Zucker" width=300 height=110>
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<h1>The International Obfuscated C Code Contest</h1>
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<h2>2006/birken - EDAMAME Award</h2>
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<a class="Left Disabled" href="#">first entry</a>
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<a class="Left" href="../index.html">↑ 2006 ↑</a>
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<a class="Left" href="../borsanyi/index.html">borsanyi →</a>
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<a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/2006/birken/birken.c">C code</a>
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<a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/2006/birken/Makefile">Makefile</a>
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<a class="Right" href="#inventory">Inventory</a>
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<a href="../../bugs.html">Bugs & (mis)features</a>
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<a href="../../faq.html#fix_an_entry">Fixing IOCCC entries</a>
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<a href="../../faq.html#fix_web_site">Fixing the web site</a>
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<a href="../../faq.html#fix_author">Fixing author info</a>
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<a href="../../judges.html">The IOCCC Judges</a>
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<h2 id="author"><a name="author"></a>Author:</h2>
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<ul>
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<li>Name: <a href="../../authors.html#Michael_Birken">Michael Birken</a><br>
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Location: <a href="../../location.html#US">US</a> - <em>United States of America</em> (<em>United States</em>)
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<br><br></li>
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<h2 id="to-build">To build:</h2>
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<div class="sourceCode" id="cb1"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span></span></code></pre></div>
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<h3 id="bugs-and-misfeatures">Bugs and (Mis)features:</h3>
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<p>The current status of this entry is:</p>
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<pre><code>STATUS: uses gets() - change to fgets() if possible</code></pre>
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<p>For more detailed information see <a href="../../bugs.html#2006_birken">2006 birken bugs</a>.</p>
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<h2 id="to-use">To use:</h2>
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<div class="sourceCode" id="cb3"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb3-1"><a href="#cb3-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./birken</span> <span class="op"><</span> file.tofu</span></code></pre></div>
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<h2 id="try">Try:</h2>
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<div class="sourceCode" id="cb4"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb4-1"><a href="#cb4-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./try.sh</span></span></code></pre></div>
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<p>etc.</p>
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<h2 id="judges-remarks">Judges’ remarks:</h2>
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<p>Q: EDAMAME?</p>
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<p>A: Electronic Design Automation - Mechanical Abstract Machine Emulator</p>
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<p>What is TOFU? It’s not a veggie friendly food, nor it is
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<a href="https://en.wikipedia.org/wiki/Verilog">Verilog</a> or
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<a href="https://en.wikipedia.org/wiki/VHDL">VHDL</a> It is not even
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<a href="https://en.wikipedia.org/wiki/Pascal_(programming_language)">Pascal</a>!</p>
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<p>NOTE: On some systems, <code>file(1)</code> claims one of the <code>.tofu</code> files is Pascal
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source. :-)</p>
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<p>It may not be the most readable hardware description language, but it is
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one of the easiest 55 page long manuals to learn. :-)</p>
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<p>For a small but non-trivial design, try implementing a
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<a href="http://en.wikipedia.org/wiki/LFSR">Linear Feedback Shift Register</a></p>
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<p>And for those who are still confused, see <a href="http://en.wikipedia.org/wiki/Edamame" class="uri">http://en.wikipedia.org/wiki/Edamame</a>
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and <a href="http://en.wikipedia.org/wiki/Tofu" class="uri">http://en.wikipedia.org/wiki/Tofu</a>.</p>
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<h2 id="authors-remarks">Author’s remarks:</h2>
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<p>If man is capable of creating <a href="http://en.wikipedia.org/wiki/Tofu">tofu</a> <a href="https://en.wikipedia.org/wiki/Hot_dog">hot
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dogs</a> (simulated meat), then why not tofu
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<a href="https://en.wikipedia.org/wiki/Electronic_circuit">circuitry</a> (simulated
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circuits)? This program is my tribute to the early computer pioneers like
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<a href="https://en.wikipedia.org/wiki/Konrad_Zuse">Konrad Zuse</a>. It’s an educational
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tool designed to introduce students to digital circuit theory using technology
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that was considered state of the art in the 1940s! To enable you to fully
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understand the capabilities of this circuit simulator, I have included a 55 page
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manual (<a href="info.pdf">info.pdf</a>) in the info portion of the entry submission.</p>
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<p>The primary obfuscation is the data structure chosen for parsing the
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input file and for executing the simulation. Oh man… coding that
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data structure gave me such a bad headache. But, I figure, who needs
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more than a pair anyway? Subtle obfuscations abound. Bonus points go
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out to the one who discovers the hidden program within the source.</p>
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<p>Note that the shape of the source is a wave, not a waveform.</p>
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<!--
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Copyright © 1984-2024 by Landon Curt Noll. All Rights Reserved.
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You are free to share and adapt this file under the terms of this license:
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Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
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For more information, see:
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https://creativecommons.org/licenses/by-sa/4.0/
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-->
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<h1 id="inventory-for-2006birken"><a name="inventory"></a>Inventory for 2006/birken</h1>
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<p><a href="#top">Jump to top</a></p>
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<h2 id="primary-files">Primary files</h2>
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<ul>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2006/birken/birken.c">birken.c</a> - entry source</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2006/birken/Makefile">Makefile</a> - entry Makefile</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2006/birken/birken.orig.c">birken.orig.c</a> - original source</li>
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<li><a href="info.pdf">info.pdf</a> - about the TOFO circuit simulator</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2006/birken/try.sh">try.sh</a> - how to run</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2006/birken/adder.tofu">adder.tofu</a> - TOFU circuit</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2006/birken/buffer.tofu">buffer.tofu</a> - TOFU circuit</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2006/birken/computer.tofu">computer.tofu</a> - TOFU circuit</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2006/birken/counter.tofu">counter.tofu</a> - TOFU circuit</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2006/birken/divider.tofu">divider.tofu</a> - TOFU circuit</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2006/birken/lfsr.tofu">lfsr.tofu</a> - TOFU circuit</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2006/birken/memory.tofu">memory.tofu</a> - TOFU circuit</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2006/birken/multiplier2.tofu">multiplier2.tofu</a> - TOFU circuit</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2006/birken/multiplier.tofu">multiplier.tofu</a> - TOFU circuit</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2006/birken/oneline.tofu">oneline.tofu</a> - TOFU circuit</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2006/birken/shift.tofu">shift.tofu</a> - TOFU circuit</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2006/birken/zuse2.tofu">zuse2.tofu</a> - TOFU circuit</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2006/birken/zuse.tofu">zuse.tofu</a> - TOFU circuit</li>
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<li><a href="2006_birken.tar.bz2">2006_birken.tar.bz2</a> - download entry</li>
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</ul>
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<h2 id="secondary-files">Secondary files</h2>
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<ul>
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<li><a href="index.html">index.html</a> - entry home page</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2006/birken/README.md">README.md</a> - markdown source for index.html</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2006/birken/.entry.json">.entry.json</a> - description of entry in JSON</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2006/birken/.gitignore">.gitignore</a> - list of files that should not be committed under git</li>
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<li><a href=".path">.path</a> - directory path from top directory</li>
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</ul>
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<!--
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Copyright © 1984-2024 by Landon Curt Noll. All Rights Reserved.
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You are free to share and adapt this file under the terms of this license:
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Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
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For more information, see:
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https://creativecommons.org/licenses/by-sa/4.0/
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-->
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<div class="footer">
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<h2>Copyright and CC BY-SA 4.0 License</h2>
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<p>This file and web page is:</p>
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<blockquote><p><b>Copyright © 1984-2024 by Landon Curt Noll. All Rights Reserved.</b></p></blockquote>
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<p>You are free to share and adapt this file under the terms of this license:</p>
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<blockquote><b>Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)</b></blockquote>
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<p>For more information, see:</p>
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<blockquote><a
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href="https://creativecommons.org/licenses/by-sa/4.0/">https://creativecommons.org/licenses/by-sa/4.0/</a></blockquote>
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<h2>Coda</h2>
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||
<p><a href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fioccc-src.github.io%2Ftemp-test-ioccc%2F2006%2Fbirken%2Findex.html">Nu HTML check this web page</a></p>
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<p><a href="#top">Jump to top</a> <a href="#content">Jump to Content</a> <a href="#inventory">Jump to Inventory</a></p>
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