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<a href='https://github.com/akkartik/mu/blob/main/mu-init.subx'>https://github.com/akkartik/mu/blob/main/mu-init.subx</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="subxComment"># Initialize the minimal runtime for Mu programs.</span>
<span id="L2" class="LineNr"> 2 </span><span class="subxComment">#</span>
<span id="L3" class="LineNr"> 3 </span><span class="subxComment"># See translate for how this file is used.</span>
<span id="L4" class="LineNr"> 4 </span><span class="subxComment">#</span>
<span id="L5" class="LineNr"> 5 </span><span class="subxComment"># Mu programs start at a function called 'main' with this signature:</span>
<span id="L6" class="LineNr"> 6 </span><span class="subxComment">#   fn main screen: (addr screen), keyboard: (addr keyboard), data-disk: (addr disk)</span>
<span id="L7" class="LineNr"> 7 </span><span class="subxComment">#</span>
<span id="L8" class="LineNr"> 8 </span><span class="subxComment"># All tests must pass first (the &quot;power-on unit test&quot;).</span>
<span id="L9" class="LineNr"> 9 </span>
<span id="L10" class="LineNr">10 </span>== code
<span id="L11" class="LineNr">11 </span>
<span id="L12" class="LineNr">12 </span><span class="SpecialChar">Entry</span>:
<span id="L13" class="LineNr">13 </span>  <span class="subxComment"># initialize stack</span>
<span id="L14" class="LineNr">14 </span>  bd/copy-to-ebp 0/imm32
<span id="L15" class="LineNr">15 </span><span class="CommentedCode">#?   (main 0 0 Primary-bus-secondary-drive)</span>
<span id="L16" class="LineNr">16 </span>  <span class="subxComment"># always first run tests</span>
<span id="L17" class="LineNr">17 </span>  (run-tests)
<span id="L18" class="LineNr">18 </span>  (<a href='104test.subx.html#L17'>num-test-failures</a>)  <span class="subxComment"># =&gt; eax</span>
<span id="L19" class="LineNr">19 </span>  <span class="subxComment"># call main if tests all passed</span>
<span id="L20" class="LineNr">20 </span>  {
<span id="L21" class="LineNr">21 </span>    3d/compare-eax-and 0/imm32
<span id="L22" class="LineNr">22 </span>    75/jump-if-!= <span class="Constant">break</span>/disp8
<span id="L23" class="LineNr">23 </span>    (<a href='500fake-screen.mu.html#L364'>clear-real-screen</a>)
<span id="L24" class="LineNr">24 </span>    c7 0/subop/copy *<span class="SpecialChar"><a href='103grapheme.subx.html#L170'>Real-screen-cursor-x</a></span> 0/imm32
<span id="L25" class="LineNr">25 </span>    c7 0/subop/copy *<span class="SpecialChar"><a href='103grapheme.subx.html#L172'>Real-screen-cursor-y</a></span> 0/imm32
<span id="L26" class="LineNr">26 </span>    (main 0 0 <span class="SpecialChar"><a href='boot.subx.html#L899'>Primary-bus-secondary-drive</a></span>)
<span id="L27" class="LineNr">27 </span>  }
<span id="L28" class="LineNr">28 </span>
<span id="L29" class="LineNr">29 </span>  <span class="subxComment"># hang indefinitely</span>
<span id="L30" class="LineNr">30 </span>  {
<span id="L31" class="LineNr">31 </span>    eb/jump <span class="Constant">loop</span>/disp8
<span id="L32" class="LineNr">32 </span>  }
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