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<title>Mu - mu-init.subx</title>
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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 "power-on unit test").</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="subxComment">#</span>
<span id="L16" class="LineNr">16 </span><span class="CommentedCode">#? (main 0 0 Primary-bus-secondary-drive)</span>
<span id="L17" class="LineNr">17 </span> <span class="subxComment"># always first run tests</span>
<span id="L18" class="LineNr">18 </span> (run-tests)
<span id="L19" class="LineNr">19 </span> (<a href='104test.subx.html#L17'>num-test-failures</a>) <span class="subxComment"># => eax</span>
<span id="L20" class="LineNr">20 </span> <span class="subxComment"># call main if tests all passed</span>
<span id="L21" class="LineNr">21 </span> {
<span id="L22" class="LineNr">22 </span> 3d/compare-eax-and 0/imm32
<span id="L23" class="LineNr">23 </span> 75/jump-if-!= <span class="Constant">break</span>/disp8
<span id="L24" class="LineNr">24 </span> (<a href='500fake-screen.mu.html#L365'>clear-real-screen</a>)
<span id="L25" class="LineNr">25 </span> c7 0/subop/copy *<span class="SpecialChar"><a href='103grapheme.subx.html#L170'>Real-screen-cursor-x</a></span> 0/imm32
<span id="L26" class="LineNr">26 </span> c7 0/subop/copy *<span class="SpecialChar"><a href='103grapheme.subx.html#L172'>Real-screen-cursor-y</a></span> 0/imm32
<span id="L27" class="LineNr">27 </span> (main 0 0 <span class="SpecialChar"><a href='boot.subx.html#L934'>Primary-bus-secondary-drive</a></span>)
<span id="L28" class="LineNr">28 </span> }
<span id="L29" class="LineNr">29 </span>
<span id="L30" class="LineNr">30 </span> <span class="subxComment"># hang indefinitely</span>
<span id="L31" class="LineNr">31 </span> {
<span id="L32" class="LineNr">32 </span> eb/jump <span class="Constant">loop</span>/disp8
<span id="L33" class="LineNr">33 </span> }
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