Prepare for the winners of **IOCCC28**. > However these are not the 2024 droids you are looking for. :-) The HTML menu (both JavaScript and non-JavaScript) has been updated. The `Status -> Rules and guidelines' have been replaced with two separate menus `Status -> IOCCC rules` and `Status -> IOCCC guidelines`. Added a new top level `social.html` page: built from a new `social.md`. Sorted rules for building specific web pages in the top level `Makefile`. Added `make social` to make the `social.html` page from `social.md`. The `bin/gen-top-html.sh` now is able to process a argument of **social** to process the new top level `social.html` page. Changed `bin/gen-top-html.sh` VERSION from "2.0.0 2025-03-13" to "2.0.1 2025-07-25". Below `About -> Home page` a new `About -> IOCCC social media` menu item as added. Because the menu change touched every HTML file, we changed the general copyright date range for HTML files from "1984-2024" to "1984-2025" due to the extensive changes made for **IOCCC28**. Those markdown files that were modified in 2025 had their copyright date range also changed from "1984-2024" to "1984-2025". Rebuilt tarballs and sitemap due to the extensive HTML rebuilding. Ran `make update` to perform the above.
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<h1>The International Obfuscated C Code Contest</h1>
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<h2>gavin.html for 2004/gavin</h2>
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</div>
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<!-- BEFORE: 1st line of markdown file: 2004/gavin/gavin.md -->
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<h1 id="usage">Usage</h1>
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<ol type="1">
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<li><p>First, build the kernel and filesystem (just <code>make</code>). In short, you need to
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build this on an x86 Linux machine. If you wish to try to compile on an OS
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other than Linux you may need modify the <a href="https://github.com/ioccc-src/winner/blob/master/2004/gavin/Makefile">Makefile</a> to compile <code>sh</code>
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using a cross-compiler that produces ELF binaries - i.e. a cross-compiler
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targeting x86 Linux. In short, you need to build this on an x86 Linux machine.</p></li>
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<li><p>Next, find a suitable machine to run the OS on. It should be perfectly safe,
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||
and since it does not directly attempt to access any hard disk drives (only a
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||
<a href="https://en.wikipedia.org/wiki/RAM_drive">RAM disk</a> loaded by the bootloader) it
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should do no damage to your existing setup, BUT I ACCEPT NO LIABILITY FOR ANY
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DAMAGE DONE BY THIS PROGRAM. Run it at your own risk. The OS has been tested
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on half a dozen machines or so, and worked on all but one. The failure came in
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the form of the machine rebooting itself midway through loading the OS, with no
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nasty side-effects.</p>
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<p>Hardware requirements - i386 or better processor, but the GUI is
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surprisingly power-hungry, so I would recommend a fast P3 or P4 processor
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(has been tested on P3/P4/Athlon machines). Minimum RAM is something like
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32MB. PS/2 mouse & keyboard required - no USB I’m afraid, and the keyboard
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||
map is for a UK keyboard. Uses VESA VBE 3.0, so should work on any modern
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graphics card (has been tested on NVIDIA, Matrox, and SiS cards).</p></li>
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||
<li><p>Now you need to setup a bootloader to load the OS. If you have a system
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||
using a lilo bootloader you can simply add the OS to your boot menu. Just add
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||
appropriate <code>image=</code> and <code>initrd=</code> lines to your <code>/etc/lilo.conf</code>, pointing at
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<code>kernel</code> and <code>fs.tar</code> respectively (as built by make earlier), then run <code>lilo</code>.
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If you do not wish modify your lilo setup, one easy option is to get yourself a
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GRUB boot disk image, and follow the instructions for GRUB below - Debian users
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can simply run<code>apt-get install grub-disk</code> to get themselves a GRUB boot disk.</p>
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<p>If you run GRUB, then at the boot menu simply hit <code>c</code> to get a console, then
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type <code>kernel=(hd0,0)/<PATH>/kernel</code> (substituting appropriate hard
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drive/partition numbers & path, or using <code>(fd0)</code> to load a kernel on the
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floppy), then <code>initrd=(hd0,0)/<PATH>/fs.tar</code>, and finally <code>boot</code>.</p></li>
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<li><p>Assuming the OS has booted, what can you do now? Well, start by trying <code>sh</code>,
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to open another shell. Then, try <code>vi gavin.c</code> to open up the OS source in a
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||
text file viewer (up/down or PgUp/PgDn to scroll). Note that the provided
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applications, <code>sh</code> and <code>vi</code> both have windows of the same size, and both open in
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the top left corner of the screen, so you may need drag the windows around a bit
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to tell them apart.</p></li>
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<li><p>To shut down - just hit the power button. :-)</p></li>
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</ol>
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