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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
+<html>
+<head>
+<meta http-equiv="content-type" content="text/html; charset=UTF-8">
+<title>Mu - ex7.mu</title>
+<meta name="Generator" content="Vim/8.1">
+<meta name="plugin-version" content="vim8.1_v1">
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+<a href='https://github.com/akkartik/mu/blob/main/ex7.mu'>https://github.com/akkartik/mu/blob/main/ex7.mu</a>
+<pre id='vimCodeElement'>
+<span id="L1" class="LineNr"> 1 </span><span class="muComment"># Cursor-based motions.</span>
+<span id="L2" class="LineNr"> 2 </span><span class="muComment">#</span>
+<span id="L3" class="LineNr"> 3 </span><span class="muComment"># To build a disk image:</span>
+<span id="L4" class="LineNr"> 4 </span><span class="muComment">#   ./translate ex7.mu             # emits disk.img</span>
+<span id="L5" class="LineNr"> 5 </span><span class="muComment"># To run:</span>
+<span id="L6" class="LineNr"> 6 </span><span class="muComment">#   qemu-system-i386 disk.img</span>
+<span id="L7" class="LineNr"> 7 </span><span class="muComment"># Or:</span>
+<span id="L8" class="LineNr"> 8 </span><span class="muComment">#   bochs -f bochsrc               # bochsrc loads disk.img</span>
+<span id="L9" class="LineNr"> 9 </span><span class="muComment">#</span>
+<span id="L10" class="LineNr">10 </span><span class="muComment"># Expected output: an interactive game a bit like &quot;snakes&quot;. Try pressing h, j,</span>
+<span id="L11" class="LineNr">11 </span><span class="muComment"># k, l.</span>
+<span id="L12" class="LineNr">12 </span>
+<span id="L13" class="LineNr">13 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='ex7.mu.html#L13'>main</a></span> <span class="Delimiter">{</span>
+<span id="L14" class="LineNr">14 </span>  <span class="PreProc">var</span> space/<span class="Constant">eax</span>: grapheme <span class="Special">&lt;-</span> copy <span class="Constant">0x20</span>
+<span id="L15" class="LineNr">15 </span>  <a href='500text-screen.mu.html#L133'>set-cursor-position</a> <span class="Constant">0</span>/screen, <span class="Constant">0</span>, <span class="Constant">0</span>
+<span id="L16" class="LineNr">16 </span>  <span class="Delimiter">{</span>
+<span id="L17" class="LineNr">17 </span>    <a href='500text-screen.mu.html#L180'>draw-cursor</a> <span class="Constant">0</span>/screen, space
+<span id="L18" class="LineNr">18 </span>    <span class="PreProc">var</span> key/<span class="Constant">eax</span>: byte <span class="Special">&lt;-</span> <a href='102keyboard.subx.html#L9'>read-key</a> <span class="Constant">0</span>/keyboard
+<span id="L19" class="LineNr">19 </span>    <span class="Delimiter">{</span>
+<span id="L20" class="LineNr">20 </span>      compare key, <span class="Constant">0x68</span>/h
+<span id="L21" class="LineNr">21 </span>      <span class="PreProc">break-if-!=</span>
+<span id="L22" class="LineNr">22 </span>      <a href='501draw-text.mu.html#L92'>draw-code-point-at-cursor</a> <span class="Constant">0</span>/screen, <span class="Constant">0x2d</span>/dash, <span class="Constant">0x31</span>/fg, <span class="Constant">0</span>/bg
+<span id="L23" class="LineNr">23 </span>      <a href='501draw-text.mu.html#L3'>move-cursor-left</a> <span class="Constant">0</span>
+<span id="L24" class="LineNr">24 </span>    <span class="Delimiter">}</span>
+<span id="L25" class="LineNr">25 </span>    <span class="Delimiter">{</span>
+<span id="L26" class="LineNr">26 </span>      compare key, <span class="Constant">0x6a</span>/j
+<span id="L27" class="LineNr">27 </span>      <span class="PreProc">break-if-!=</span>
+<span id="L28" class="LineNr">28 </span>      <a href='501draw-text.mu.html#L92'>draw-code-point-at-cursor</a> <span class="Constant">0</span>/screen, <span class="Constant">0x7c</span>/vertical-bar, <span class="Constant">0x31</span>/fg, <span class="Constant">0</span>/bg
+<span id="L29" class="LineNr">29 </span>      <a href='501draw-text.mu.html#L47'>move-cursor-down</a> <span class="Constant">0</span>
+<span id="L30" class="LineNr">30 </span>    <span class="Delimiter">}</span>
+<span id="L31" class="LineNr">31 </span>    <span class="Delimiter">{</span>
+<span id="L32" class="LineNr">32 </span>      compare key, <span class="Constant">0x6b</span>/k
+<span id="L33" class="LineNr">33 </span>      <span class="PreProc">break-if-!=</span>
+<span id="L34" class="LineNr">34 </span>      <a href='501draw-text.mu.html#L92'>draw-code-point-at-cursor</a> <span class="Constant">0</span>/screen, <span class="Constant">0x7c</span>/vertical-bar, <span class="Constant">0x31</span>/fg, <span class="Constant">0</span>/bg
+<span id="L35" class="LineNr">35 </span>      <a href='501draw-text.mu.html#L34'>move-cursor-up</a> <span class="Constant">0</span>
+<span id="L36" class="LineNr">36 </span>    <span class="Delimiter">}</span>
+<span id="L37" class="LineNr">37 </span>    <span class="Delimiter">{</span>
+<span id="L38" class="LineNr">38 </span>      compare key, <span class="Constant">0x6c</span>/l
+<span id="L39" class="LineNr">39 </span>      <span class="PreProc">break-if-!=</span>
+<span id="L40" class="LineNr">40 </span>      <span class="PreProc">var</span> g/<span class="Constant">eax</span>: code-point <span class="Special">&lt;-</span> copy <span class="Constant">0x2d</span>/dash
+<span id="L41" class="LineNr">41 </span>      <a href='501draw-text.mu.html#L92'>draw-code-point-at-cursor</a> <span class="Constant">0</span>/screen, <span class="Constant">0x2d</span>/dash, <span class="Constant">0x31</span>/fg, <span class="Constant">0</span>/bg
+<span id="L42" class="LineNr">42 </span>      <a href='501draw-text.mu.html#L16'>move-cursor-right</a> <span class="Constant">0</span>
+<span id="L43" class="LineNr">43 </span>    <span class="Delimiter">}</span>
+<span id="L44" class="LineNr">44 </span>    <span class="PreProc">loop</span>
+<span id="L45" class="LineNr">45 </span>  <span class="Delimiter">}</span>
+<span id="L46" class="LineNr">46 </span><span class="Delimiter">}</span>
+</pre>
+</body>
+</html>
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