about summary refs log tree commit diff stats
path: root/html/ex3.mu.html
blob: 77e4d705fb71355e1cfddeb6aeeba2e6380ba52e (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
<!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 - ex3.mu</title>
<meta name="Generator" content="Vim/8.1">
<meta name="plugin-version" content="vim8.1_v1">
<meta name="syntax" content="none">
<meta name="settings" content="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy=">
<meta name="colorscheme" content="minimal-light">
<style type="text/css">
<!--
pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #c6c6c6; }
body { font-size:12pt; font-family: monospace; color: #000000; background-color: #c6c6c6; }
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.PreProc { color: #c000c0; }
.Special { color: #ff6060; }
.LineNr { }
.Constant { color: #008787; }
.Delimiter { color: #c000c0; }
.muFunction { color: #af5f00; text-decoration: underline; }
.muComment { color: #005faf; }
-->
</style>

<script type='text/javascript'>
<!--

/* function to open any folds containing a jumped-to line before jumping to it */
function JumpToLine()
{
  var lineNum;
  lineNum = window.location.hash;
  lineNum = lineNum.substr(1); /* strip off '#' */

  if (lineNum.indexOf('L') == -1) {
    lineNum = 'L'+lineNum;
  }
  var lineElem = document.getElementById(lineNum);
  /* Always jump to new location even if the line was hidden inside a fold, or
   * we corrected the raw number to a line ID.
   */
  if (lineElem) {
    lineElem.scrollIntoView(true);
  }
  return true;
}
if ('onhashchange' in window) {
  window.onhashchange = JumpToLine;
}

-->
</script>
</head>
<body onload='JumpToLine();'>
<a href='https://github.com/akkartik/mu/blob/main/ex3.mu'>https://github.com/akkartik/mu/blob/main/ex3.mu</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="muComment"># Draw pixels in response to keyboard events, starting from the top-left</span>
<span id="L2" class="LineNr"> 2 </span><span class="muComment"># and in raster order.</span>
<span id="L3" class="LineNr"> 3 </span><span class="muComment">#</span>
<span id="L4" class="LineNr"> 4 </span><span class="muComment"># To build a disk image:</span>
<span id="L5" class="LineNr"> 5 </span><span class="muComment">#   ./translate ex3.mu             # emits disk.img</span>
<span id="L6" class="LineNr"> 6 </span><span class="muComment"># To run:</span>
<span id="L7" class="LineNr"> 7 </span><span class="muComment">#   qemu-system-i386 disk.img</span>
<span id="L8" class="LineNr"> 8 </span><span class="muComment"># Or:</span>
<span id="L9" class="LineNr"> 9 </span><span class="muComment">#   bochs -f bochsrc               # bochsrc loads disk.img</span>
<span id="L10" class="LineNr">10 </span><span class="muComment">#</span>
<span id="L11" class="LineNr">11 </span><span class="muComment"># Expected output: a new green pixel starting from the top left corner of the</span>
<span id="L12" class="LineNr">12 </span><span class="muComment"># screen every time you press a key (letter or digit)</span>
<span id="L13" class="LineNr">13 </span>
<span id="L14" class="LineNr">14 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='ex3.mu.html#L14'>main</a></span> <a href='500text-screen.mu.html#L9'>screen</a>: (addr <a href='500text-screen.mu.html#L9'>screen</a>), keyboard: (addr keyboard), data-disk: (addr disk) <span class="Delimiter">{</span>
<span id="L15" class="LineNr">15 </span>  <span class="PreProc">var</span> x/<span class="Constant">ecx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
<span id="L16" class="LineNr">16 </span>  <span class="PreProc">var</span> y/<span class="Constant">edx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
<span id="L17" class="LineNr">17 </span>  <span class="Delimiter">{</span>
<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#L21'>read-key</a> keyboard
<span id="L19" class="LineNr">19 </span>    compare key, <span class="Constant">0</span>
<span id="L20" class="LineNr">20 </span>    <span class="PreProc">loop-if-=</span>  <span class="muComment"># busy wait</span>
<span id="L21" class="LineNr">21 </span>    <a href='101screen.subx.html#L8'>pixel-on-real-screen</a> x, y, <span class="Constant">0x31</span>/green
<span id="L22" class="LineNr">22 </span>    x <span class="Special">&lt;-</span> increment
<span id="L23" class="LineNr">23 </span>    compare x, <span class="Constant">0x400</span>/screen-width=<span class="Constant">1024</span>
<span id="L24" class="LineNr">24 </span>    <span class="Delimiter">{</span>
<span id="L25" class="LineNr">25 </span>      <span class="PreProc">break-if-&lt;</span>
<span id="L26" class="LineNr">26 </span>      y <span class="Special">&lt;-</span> increment
<span id="L27" class="LineNr">27 </span>      x <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
<span id="L28" class="LineNr">28 </span>    <span class="Delimiter">}</span>
<span id="L29" class="LineNr">29 </span>    <span class="PreProc">loop</span>
<span id="L30" class="LineNr">30 </span>  <span class="Delimiter">}</span>
<span id="L31" class="LineNr">31 </span><span class="Delimiter">}</span>
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->