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This commit is contained in:
Kartik Agaram 2021-01-13 00:08:31 -08:00
parent 422ebaf88c
commit f6fd7e1be0
22 changed files with 764 additions and 150 deletions
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2
html/baremetal/101screen.subx.html generated
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@ -15,8 +15,8 @@ body { font-size:12pt; font-family: monospace; color: #000000; background-color:
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
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.Constant { color: #008787; }
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@ -15,8 +15,8 @@ body { font-size:12pt; font-family: monospace; color: #000000; background-color:
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.subxComment { color: #005faf; }
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.LineNr { }
.subxFunction { color: #af5f00; text-decoration: underline; }
.Constant { color: #008787; }
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@ -14,9 +14,10 @@ pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-
body { font-size:12pt; font-family: monospace; color: #000000; background-color: #c6c6c6; }
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
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@ -54,76 +55,117 @@ if ('onhashchange' in window) {
<body onload='JumpToLine();'>
<a href='https://github.com/akkartik/mu/blob/main/baremetal/103grapheme.subx'>https://github.com/akkartik/mu/blob/main/baremetal/103grapheme.subx</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="subxFunction">draw-grapheme</span>: <span class="subxComment"># screen: (addr screen), g: grapheme, x: int, y: int, color: int</span>
<span id="L2" class="LineNr"> 2 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L3" class="LineNr"> 3 </span> 55/push-ebp
<span id="L4" class="LineNr"> 4 </span> 89/&lt;- %ebp 4/r32/esp
<span id="L5" class="LineNr"> 5 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L6" class="LineNr"> 6 </span> 50/push-eax
<span id="L7" class="LineNr"> 7 </span> 51/push-ecx
<span id="L8" class="LineNr"> 8 </span> 52/push-edx
<span id="L9" class="LineNr"> 9 </span> 53/push-ebx
<span id="L10" class="LineNr">10 </span> 56/push-esi
<span id="L11" class="LineNr">11 </span> <span class="subxComment"># var letter-bitmap/esi = font[g]</span>
<span id="L12" class="LineNr">12 </span> 8b/-&gt; *(ebp+0xc) 6/r32/esi
<span id="L13" class="LineNr">13 </span> c1 4/subop/shift-left %esi 4/imm8
<span id="L14" class="LineNr">14 </span> 8d/copy-address *(esi+0x8800) 6/r32/esi <span class="subxComment"># font-start</span>
<span id="L15" class="LineNr">15 </span> <span class="subxComment"># if (letter-bitmap &gt;= 0x9000) return # characters beyond ASCII currently not supported</span>
<span id="L16" class="LineNr">16 </span> 81 7/subop/compare %esi 0x9000/imm32
<span id="L17" class="LineNr">17 </span> 7d/jump-if-&gt;= $draw-grapheme:end/disp8
<span id="L18" class="LineNr">18 </span> <span class="subxComment"># edx = y</span>
<span id="L19" class="LineNr">19 </span> 8b/-&gt; *(ebp+0x14) 2/r32/edx
<span id="L20" class="LineNr">20 </span> <span class="subxComment"># var ymax/ebx: int = y + 16</span>
<span id="L21" class="LineNr">21 </span> 8b/-&gt; *(ebp+0x14) 3/r32/ebx
<span id="L22" class="LineNr">22 </span> 81 0/subop/add %ebx 0x10/imm32
<span id="L23" class="LineNr">23 </span> {
<span id="L24" class="LineNr">24 </span> <span class="subxComment"># if (y &gt;= ymax) break</span>
<span id="L25" class="LineNr">25 </span> 39/compare %edx 3/r32/ebx
<span id="L26" class="LineNr">26 </span> 7d/jump-if-&gt;= <span class="Constant">break</span>/disp8
<span id="L27" class="LineNr">27 </span> <span class="subxComment"># eax = x + 7</span>
<span id="L28" class="LineNr">28 </span> 8b/-&gt; *(ebp+0x10) 0/r32/eax
<span id="L29" class="LineNr">29 </span> 81 0/subop/add %eax 7/imm32
<span id="L30" class="LineNr">30 </span> <span class="subxComment"># var xmin/ecx: int = x</span>
<span id="L31" class="LineNr">31 </span> 8b/-&gt; *(ebp+0x10) 1/r32/ecx
<span id="L32" class="LineNr">32 </span> <span class="subxComment"># var row-bitmap/ebx: int = *letter-bitmap</span>
<span id="L33" class="LineNr">33 </span> 53/push-ebx
<span id="L34" class="LineNr">34 </span> 8b/-&gt; *esi 3/r32/ebx
<span id="L35" class="LineNr">35 </span> {
<span id="L36" class="LineNr">36 </span> <span class="subxComment"># if (x &lt; xmin) break</span>
<span id="L37" class="LineNr">37 </span> 39/compare %eax 1/r32/ecx
<span id="L38" class="LineNr">38 </span> 7c/jump-if-&lt; <span class="Constant">break</span>/disp8
<span id="L39" class="LineNr">39 </span> <span class="subxComment"># shift LSB from row-bitmap into carry flag (CF)</span>
<span id="L40" class="LineNr">40 </span> c1 5/subop/shift-right-logical %ebx 1/imm8
<span id="L41" class="LineNr">41 </span> <span class="subxComment"># if LSB, draw a pixel</span>
<span id="L42" class="LineNr">42 </span> {
<span id="L43" class="LineNr">43 </span> 73/jump-if-not-CF <span class="Constant">break</span>/disp8
<span id="L44" class="LineNr">44 </span> (<a href='101screen.subx.html#L3'>pixel</a> *(ebp+8) %eax %edx *(ebp+0x18))
<span id="L45" class="LineNr">45 </span> }
<span id="L46" class="LineNr">46 </span> <span class="subxComment"># --x</span>
<span id="L47" class="LineNr">47 </span> 48/decrement-eax
<span id="L48" class="LineNr">48 </span> <span class="subxComment">#</span>
<span id="L49" class="LineNr">49 </span> eb/jump <span class="Constant">loop</span>/disp8
<span id="L50" class="LineNr">50 </span> }
<span id="L51" class="LineNr">51 </span> <span class="subxComment"># reclaim row-bitmap</span>
<span id="L52" class="LineNr">52 </span> 5b/pop-to-ebx
<span id="L53" class="LineNr">53 </span> <span class="subxComment"># ++y</span>
<span id="L54" class="LineNr">54 </span> 42/increment-edx
<span id="L55" class="LineNr">55 </span> <span class="subxComment"># next bitmap row</span>
<span id="L56" class="LineNr">56 </span> 46/increment-esi
<span id="L57" class="LineNr">57 </span> <span class="subxComment">#</span>
<span id="L58" class="LineNr">58 </span> eb/jump <span class="Constant">loop</span>/disp8
<span id="L59" class="LineNr">59 </span> }
<span id="L60" class="LineNr">60 </span><span class="Constant">$draw-grapheme:end</span>:
<span id="L61" class="LineNr">61 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L62" class="LineNr">62 </span> 5e/pop-to-esi
<span id="L63" class="LineNr">63 </span> 5b/pop-to-ebx
<span id="L64" class="LineNr">64 </span> 5a/pop-to-edx
<span id="L65" class="LineNr">65 </span> 59/pop-to-ecx
<span id="L66" class="LineNr">66 </span> 58/pop-to-eax
<span id="L67" class="LineNr">67 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L68" class="LineNr">68 </span> 89/&lt;- %esp 5/r32/ebp
<span id="L69" class="LineNr">69 </span> 5d/pop-to-ebp
<span id="L70" class="LineNr">70 </span> c3/return
<span id="L1" class="LineNr"> 1 </span><span class="subxFunction">draw-grapheme</span>: <span class="subxComment"># screen: (addr screen), g: grapheme, x: int, y: int, color: int</span>
<span id="L2" class="LineNr"> 2 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L3" class="LineNr"> 3 </span> 55/push-ebp
<span id="L4" class="LineNr"> 4 </span> 89/&lt;- %ebp 4/r32/esp
<span id="L5" class="LineNr"> 5 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L6" class="LineNr"> 6 </span> 50/push-eax
<span id="L7" class="LineNr"> 7 </span> 51/push-ecx
<span id="L8" class="LineNr"> 8 </span> 52/push-edx
<span id="L9" class="LineNr"> 9 </span> 53/push-ebx
<span id="L10" class="LineNr"> 10 </span> 56/push-esi
<span id="L11" class="LineNr"> 11 </span> <span class="subxComment"># TODO: support fake screen; we currently assume 'screen' is always 0 (real)</span>
<span id="L12" class="LineNr"> 12 </span> <span class="subxComment"># var letter-bitmap/esi = font[g]</span>
<span id="L13" class="LineNr"> 13 </span> 8b/-&gt; *(ebp+0xc) 6/r32/esi
<span id="L14" class="LineNr"> 14 </span> c1 4/subop/shift-left %esi 4/imm8
<span id="L15" class="LineNr"> 15 </span> 8d/copy-address *(esi+0x8800) 6/r32/esi <span class="subxComment"># font-start</span>
<span id="L16" class="LineNr"> 16 </span> <span class="subxComment"># if (letter-bitmap &gt;= 0x9000) return # characters beyond ASCII currently not supported</span>
<span id="L17" class="LineNr"> 17 </span> 81 7/subop/compare %esi 0x9000/imm32
<span id="L18" class="LineNr"> 18 </span> 7d/jump-if-&gt;= $draw-grapheme:end/disp8
<span id="L19" class="LineNr"> 19 </span> <span class="subxComment"># edx = y</span>
<span id="L20" class="LineNr"> 20 </span> 8b/-&gt; *(ebp+0x14) 2/r32/edx
<span id="L21" class="LineNr"> 21 </span> <span class="subxComment"># var ymax/ebx: int = y + 16</span>
<span id="L22" class="LineNr"> 22 </span> 8b/-&gt; *(ebp+0x14) 3/r32/ebx
<span id="L23" class="LineNr"> 23 </span> 81 0/subop/add %ebx 0x10/imm32
<span id="L24" class="LineNr"> 24 </span> {
<span id="L25" class="LineNr"> 25 </span> <span class="subxComment"># if (y &gt;= ymax) break</span>
<span id="L26" class="LineNr"> 26 </span> 39/compare %edx 3/r32/ebx
<span id="L27" class="LineNr"> 27 </span> 7d/jump-if-&gt;= <span class="Constant">break</span>/disp8
<span id="L28" class="LineNr"> 28 </span> <span class="subxComment"># eax = x + 7</span>
<span id="L29" class="LineNr"> 29 </span> 8b/-&gt; *(ebp+0x10) 0/r32/eax
<span id="L30" class="LineNr"> 30 </span> 81 0/subop/add %eax 7/imm32
<span id="L31" class="LineNr"> 31 </span> <span class="subxComment"># var xmin/ecx: int = x</span>
<span id="L32" class="LineNr"> 32 </span> 8b/-&gt; *(ebp+0x10) 1/r32/ecx
<span id="L33" class="LineNr"> 33 </span> <span class="subxComment"># var row-bitmap/ebx: int = *letter-bitmap</span>
<span id="L34" class="LineNr"> 34 </span> 53/push-ebx
<span id="L35" class="LineNr"> 35 </span> 8b/-&gt; *esi 3/r32/ebx
<span id="L36" class="LineNr"> 36 </span> {
<span id="L37" class="LineNr"> 37 </span> <span class="subxComment"># if (x &lt; xmin) break</span>
<span id="L38" class="LineNr"> 38 </span> 39/compare %eax 1/r32/ecx
<span id="L39" class="LineNr"> 39 </span> 7c/jump-if-&lt; <span class="Constant">break</span>/disp8
<span id="L40" class="LineNr"> 40 </span> <span class="subxComment"># shift LSB from row-bitmap into carry flag (CF)</span>
<span id="L41" class="LineNr"> 41 </span> c1 5/subop/shift-right-logical %ebx 1/imm8
<span id="L42" class="LineNr"> 42 </span> <span class="subxComment"># if LSB, draw a pixel</span>
<span id="L43" class="LineNr"> 43 </span> {
<span id="L44" class="LineNr"> 44 </span> 73/jump-if-not-CF <span class="Constant">break</span>/disp8
<span id="L45" class="LineNr"> 45 </span> (<a href='101screen.subx.html#L3'>pixel</a> *(ebp+8) %eax %edx *(ebp+0x18))
<span id="L46" class="LineNr"> 46 </span> }
<span id="L47" class="LineNr"> 47 </span> <span class="subxComment"># --x</span>
<span id="L48" class="LineNr"> 48 </span> 48/decrement-eax
<span id="L49" class="LineNr"> 49 </span> <span class="subxComment">#</span>
<span id="L50" class="LineNr"> 50 </span> eb/jump <span class="Constant">loop</span>/disp8
<span id="L51" class="LineNr"> 51 </span> }
<span id="L52" class="LineNr"> 52 </span> <span class="subxComment"># reclaim row-bitmap</span>
<span id="L53" class="LineNr"> 53 </span> 5b/pop-to-ebx
<span id="L54" class="LineNr"> 54 </span> <span class="subxComment"># ++y</span>
<span id="L55" class="LineNr"> 55 </span> 42/increment-edx
<span id="L56" class="LineNr"> 56 </span> <span class="subxComment"># next bitmap row</span>
<span id="L57" class="LineNr"> 57 </span> 46/increment-esi
<span id="L58" class="LineNr"> 58 </span> <span class="subxComment">#</span>
<span id="L59" class="LineNr"> 59 </span> eb/jump <span class="Constant">loop</span>/disp8
<span id="L60" class="LineNr"> 60 </span> }
<span id="L61" class="LineNr"> 61 </span><span class="Constant">$draw-grapheme:end</span>:
<span id="L62" class="LineNr"> 62 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L63" class="LineNr"> 63 </span> 5e/pop-to-esi
<span id="L64" class="LineNr"> 64 </span> 5b/pop-to-ebx
<span id="L65" class="LineNr"> 65 </span> 5a/pop-to-edx
<span id="L66" class="LineNr"> 66 </span> 59/pop-to-ecx
<span id="L67" class="LineNr"> 67 </span> 58/pop-to-eax
<span id="L68" class="LineNr"> 68 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L69" class="LineNr"> 69 </span> 89/&lt;- %esp 5/r32/ebp
<span id="L70" class="LineNr"> 70 </span> 5d/pop-to-ebp
<span id="L71" class="LineNr"> 71 </span> c3/return
<span id="L72" class="LineNr"> 72 </span>
<span id="L73" class="LineNr"> 73 </span><span class="subxFunction">cursor-position</span>: <span class="subxComment"># screen: (addr screen) -&gt; _/eax: int, _/ecx: int</span>
<span id="L74" class="LineNr"> 74 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L75" class="LineNr"> 75 </span> 55/push-ebp
<span id="L76" class="LineNr"> 76 </span> 89/&lt;- %ebp 4/r32/esp
<span id="L77" class="LineNr"> 77 </span> <span class="subxComment"># TODO: support fake screen; we currently assume 'screen' is always 0 (real)</span>
<span id="L78" class="LineNr"> 78 </span> 8b/-&gt; *<span class="SpecialChar"><a href='103grapheme.subx.html#L107'>Default-next-x</a></span> 0/r32/eax
<span id="L79" class="LineNr"> 79 </span> 8b/-&gt; *<span class="SpecialChar"><a href='103grapheme.subx.html#L110'>Default-next-y</a></span> 1/r32/ecx
<span id="L80" class="LineNr"> 80 </span><span class="Constant">$cursor-position:end</span>:
<span id="L81" class="LineNr"> 81 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L82" class="LineNr"> 82 </span> 89/&lt;- %esp 5/r32/ebp
<span id="L83" class="LineNr"> 83 </span> 5d/pop-to-ebp
<span id="L84" class="LineNr"> 84 </span> c3/return
<span id="L85" class="LineNr"> 85 </span>
<span id="L86" class="LineNr"> 86 </span><span class="subxFunction">set-cursor-position</span>: <span class="subxComment"># screen: (addr screen), x: int, y: int</span>
<span id="L87" class="LineNr"> 87 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L88" class="LineNr"> 88 </span> 55/push-ebp
<span id="L89" class="LineNr"> 89 </span> 89/&lt;- %ebp 4/r32/esp
<span id="L90" class="LineNr"> 90 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L91" class="LineNr"> 91 </span> 50/push-eax
<span id="L92" class="LineNr"> 92 </span> <span class="subxComment"># TODO: support fake screen; we currently assume 'screen' is always 0 (real)</span>
<span id="L93" class="LineNr"> 93 </span> 8b/-&gt; *(ebp+0xc) 0/r32/eax
<span id="L94" class="LineNr"> 94 </span> 89/&lt;- *<span class="SpecialChar"><a href='103grapheme.subx.html#L107'>Default-next-x</a></span> 0/r32/eax
<span id="L95" class="LineNr"> 95 </span> 8b/-&gt; *(ebp+0x10) 0/r32/eax
<span id="L96" class="LineNr"> 96 </span> 89/&lt;- *<span class="SpecialChar"><a href='103grapheme.subx.html#L110'>Default-next-y</a></span> 0/r32/eax
<span id="L97" class="LineNr"> 97 </span><span class="Constant">$set-cursor-position:end</span>:
<span id="L98" class="LineNr"> 98 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L99" class="LineNr"> 99 </span> 58/pop-to-eax
<span id="L100" class="LineNr">100 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L101" class="LineNr">101 </span> 89/&lt;- %esp 5/r32/ebp
<span id="L102" class="LineNr">102 </span> 5d/pop-to-ebp
<span id="L103" class="LineNr">103 </span> c3/return
<span id="L104" class="LineNr">104 </span>
<span id="L105" class="LineNr">105 </span>== data
<span id="L106" class="LineNr">106 </span>
<span id="L107" class="LineNr">107 </span><span class="SpecialChar">Default-next-x</span>:
<span id="L108" class="LineNr">108 </span> 0/imm32
<span id="L109" class="LineNr">109 </span>
<span id="L110" class="LineNr">110 </span><span class="SpecialChar">Default-next-y</span>:
<span id="L111" class="LineNr">111 </span> 0/imm32
</pre>
</body>
</html>

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<a href='https://github.com/akkartik/mu/blob/main/baremetal/106stream.subx'>https://github.com/akkartik/mu/blob/main/baremetal/106stream.subx</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="subxComment"># streams: data structure for operating on arrays in a stateful manner</span>
<span id="L2" class="LineNr"> 2 </span><span class="subxComment">#</span>
<span id="L3" class="LineNr"> 3 </span><span class="subxComment"># A stream looks like this:</span>
<span id="L4" class="LineNr"> 4 </span><span class="subxComment"># write: int # index at which writes go</span>
<span id="L5" class="LineNr"> 5 </span><span class="subxComment"># read: int # index that we've read until</span>
<span id="L6" class="LineNr"> 6 </span><span class="subxComment"># data: (array byte) # prefixed by size as usual</span>
<span id="L7" class="LineNr"> 7 </span><span class="subxComment">#</span>
<span id="L8" class="LineNr"> 8 </span><span class="subxComment"># some primitives for operating on streams:</span>
<span id="L9" class="LineNr"> 9 </span><span class="subxComment"># - clear-stream (clears everything but the data size)</span>
<span id="L10" class="LineNr">10 </span><span class="subxComment"># - rewind-stream (resets read pointer)</span>
<span id="L11" class="LineNr">11 </span>
<span id="L12" class="LineNr">12 </span>== code
<span id="L13" class="LineNr">13 </span><span class="subxComment"># instruction effective address register displacement immediate</span>
<span id="L14" class="LineNr">14 </span><span class="subxS1Comment"># . op subop mod rm32 base index scale r32</span>
<span id="L15" class="LineNr">15 </span><span class="subxS1Comment"># . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes</span>
<span id="L16" class="LineNr">16 </span>
<span id="L17" class="LineNr">17 </span><span class="subxFunction">clear-stream</span>: <span class="subxComment"># f: (addr stream byte)</span>
<span id="L18" class="LineNr">18 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L19" class="LineNr">19 </span> 55/push-ebp
<span id="L20" class="LineNr">20 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L21" class="LineNr">21 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L22" class="LineNr">22 </span> 50/push-eax
<span id="L23" class="LineNr">23 </span> 51/push-ecx
<span id="L24" class="LineNr">24 </span> <span class="subxComment"># eax = f</span>
<span id="L25" class="LineNr">25 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+8) to eax</span>
<span id="L26" class="LineNr">26 </span> <span class="subxComment"># var count/ecx: int = f-&gt;size</span>
<span id="L27" class="LineNr">27 </span> 8b/copy 1/mod/*+disp8 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(eax+8) to ecx</span>
<span id="L28" class="LineNr">28 </span> <span class="subxComment"># var max/ecx: (addr byte) = &amp;f-&gt;data[f-&gt;size]</span>
<span id="L29" class="LineNr">29 </span> 8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 1/index/ecx <span class="Normal"> . </span> 1/r32/ecx 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy eax+ecx+12 to ecx</span>
<span id="L30" class="LineNr">30 </span> <span class="subxComment"># f-&gt;write = 0</span>
<span id="L31" class="LineNr">31 </span> c7 0/subop/copy 0/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/imm32 <span class="subxComment"># copy to *eax</span>
<span id="L32" class="LineNr">32 </span> <span class="subxComment"># f-&gt;read = 0</span>
<span id="L33" class="LineNr">33 </span> c7 0/subop/copy 1/mod/*+disp8 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/disp8 0/imm32 <span class="subxComment"># copy to *(eax+4)</span>
<span id="L34" class="LineNr">34 </span> <span class="subxH1Comment"># - clear all stream data</span>
<span id="L35" class="LineNr">35 </span> <span class="subxH1Comment"># - this isn't strictly necessary, and it can slow things down *a lot*, but better safe than sorry.</span>
<span id="L36" class="LineNr">36 </span> <span class="subxComment"># var curr/eax: (addr byte) = f-&gt;data</span>
<span id="L37" class="LineNr">37 </span> 81 0/subop/add 3/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to eax</span>
<span id="L38" class="LineNr">38 </span><span class="Constant">$clear-stream:loop</span>:
<span id="L39" class="LineNr">39 </span> <span class="subxComment"># if (curr &gt;= max) break</span>
<span id="L40" class="LineNr">40 </span> 39/compare 3/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># compare eax with ecx</span>
<span id="L41" class="LineNr">41 </span> 73/jump-if-addr&gt;= $clear-stream:end/disp8
<span id="L42" class="LineNr">42 </span> <span class="subxComment"># *curr = 0</span>
<span id="L43" class="LineNr">43 </span> c6 0/subop/copy-byte 0/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/imm8 <span class="subxComment"># copy byte to *eax</span>
<span id="L44" class="LineNr">44 </span> <span class="subxComment"># ++curr</span>
<span id="L45" class="LineNr">45 </span> 40/increment-eax
<span id="L46" class="LineNr">46 </span> eb/jump $clear-stream:<span class="Constant">loop</span>/disp8
<span id="L47" class="LineNr">47 </span><span class="Constant">$clear-stream:end</span>:
<span id="L48" class="LineNr">48 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L49" class="LineNr">49 </span> 59/pop-to-ecx
<span id="L50" class="LineNr">50 </span> 58/pop-to-eax
<span id="L51" class="LineNr">51 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L52" class="LineNr">52 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L53" class="LineNr">53 </span> 5d/pop-to-ebp
<span id="L54" class="LineNr">54 </span> c3/return
<span id="L55" class="LineNr">55 </span>
<span id="L56" class="LineNr">56 </span><span class="subxFunction">rewind-stream</span>: <span class="subxComment"># f: (addr stream byte)</span>
<span id="L57" class="LineNr">57 </span> <span class="subxS1Comment"># . prologue</span>
<span id="L58" class="LineNr">58 </span> 55/push-ebp
<span id="L59" class="LineNr">59 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span>
<span id="L60" class="LineNr">60 </span> <span class="subxS1Comment"># . save registers</span>
<span id="L61" class="LineNr">61 </span> 50/push-eax
<span id="L62" class="LineNr">62 </span> <span class="subxComment"># eax = f</span>
<span id="L63" class="LineNr">63 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+8) to eax</span>
<span id="L64" class="LineNr">64 </span> <span class="subxComment"># f-&gt;read = 0</span>
<span id="L65" class="LineNr">65 </span> c7 0/subop/copy 1/mod/*+disp8 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/disp8 0/imm32 <span class="subxComment"># copy to *(eax+4)</span>
<span id="L66" class="LineNr">66 </span><span class="Constant">$rewind-stream:end</span>:
<span id="L67" class="LineNr">67 </span> <span class="subxS1Comment"># . restore registers</span>
<span id="L68" class="LineNr">68 </span> 58/pop-to-eax
<span id="L69" class="LineNr">69 </span> <span class="subxS1Comment"># . epilogue</span>
<span id="L70" class="LineNr">70 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span>
<span id="L71" class="LineNr">71 </span> 5d/pop-to-ebp
<span id="L72" class="LineNr">72 </span> c3/return
<span id="L73" class="LineNr">73 </span>
<span id="L74" class="LineNr">74 </span><span class="subxS2Comment"># . . vim&#0058;nowrap:textwidth=0</span>
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->

4
html/baremetal/108write.subx.html generated
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@ -18,10 +18,10 @@ a { color:inherit; }
.subxS1Comment { color: #0000af; }
.subxS2Comment { color: #8a8a8a; }
.LineNr { }
.subxFunction { color: #af5f00; text-decoration: underline; }
.Normal { color: #000000; background-color: #c6c6c6; padding-bottom: 1px; }
.Constant { color: #008787; }
.subxMinorFunction { color: #875f5f; }
.subxFunction { color: #af5f00; text-decoration: underline; }
.Normal { color: #000000; background-color: #c6c6c6; padding-bottom: 1px; }
-->
</style>

2
html/baremetal/112read-byte.subx.html generated
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@ -18,9 +18,9 @@ a { color:inherit; }
.subxS1Comment { color: #0000af; }
.subxS2Comment { color: #8a8a8a; }
.LineNr { }
.Constant { color: #008787; }
.subxFunction { color: #af5f00; text-decoration: underline; }
.Normal { color: #000000; background-color: #c6c6c6; padding-bottom: 1px; }
.Constant { color: #008787; }
-->
</style>

2
html/baremetal/115write-byte.subx.html generated
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@ -18,9 +18,9 @@ a { color:inherit; }
.subxS1Comment { color: #0000af; }
.subxS2Comment { color: #8a8a8a; }
.LineNr { }
.Constant { color: #008787; }
.subxFunction { color: #af5f00; text-decoration: underline; }
.Normal { color: #000000; background-color: #c6c6c6; padding-bottom: 1px; }
.Constant { color: #008787; }
-->
</style>

2
html/baremetal/120allocate.subx.html generated
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@ -18,9 +18,9 @@ a { color:inherit; }
.subxS1Comment { color: #0000af; }
.subxS2Comment { color: #8a8a8a; }
.LineNr { }
.Constant { color: #008787; }
.subxFunction { color: #af5f00; text-decoration: underline; }
.Normal { color: #000000; background-color: #c6c6c6; padding-bottom: 1px; }
.Constant { color: #008787; }
-->
</style>

4
html/baremetal/302stack_allocate.subx.html generated
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@ -15,11 +15,11 @@ body { font-size:12pt; font-family: monospace; color: #000000; background-color:
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.subxComment { color: #005faf; }
.LineNr { }
.SpecialChar { color: #d70000; }
.CommentedCode { color: #8a8a8a; }
.LineNr { }
.subxFunction { color: #af5f00; text-decoration: underline; }
.Constant { color: #008787; }
.CommentedCode { color: #8a8a8a; }
-->
</style>

2
html/baremetal/309stream.subx.html generated
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@ -15,8 +15,8 @@ body { font-size:12pt; font-family: monospace; color: #000000; background-color:
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.subxComment { color: #005faf; }
.LineNr { }
.subxS1Comment { color: #0000af; }
.LineNr { }
.subxFunction { color: #af5f00; text-decoration: underline; }
.Constant { color: #008787; }
-->

4
html/baremetal/313index-bounds-check.subx.html generated
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@ -15,10 +15,10 @@ body { font-size:12pt; font-family: monospace; color: #000000; background-color:
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.subxComment { color: #005faf; }
.LineNr { }
.subxS1Comment { color: #0000af; }
.subxMinorFunction { color: #875f5f; }
.LineNr { }
.Constant { color: #008787; }
.subxMinorFunction { color: #875f5f; }
-->
</style>

21
html/baremetal/400.mu.html generated
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@ -14,9 +14,9 @@ pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-
body { font-size:12pt; font-family: monospace; color: #000000; background-color: #c6c6c6; }
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.PreProc { color: #c000c0; }
.LineNr { }
.Constant { color: #008787; }
.PreProc { color: #c000c0; }
-->
</style>
@ -52,14 +52,17 @@ if ('onhashchange' in window) {
<body onload='JumpToLine();'>
<a href='https://github.com/akkartik/mu/blob/main/baremetal/400.mu'>https://github.com/akkartik/mu/blob/main/baremetal/400.mu</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr">1 </span><span class="PreProc">sig</span> <a href='101screen.subx.html#L3'>pixel</a> screen: (addr screen), x: int, y: int, color: int
<span id="L2" class="LineNr">2 </span><span class="PreProc">sig</span> <a href='102keyboard.subx.html#L3'>read-key</a> kbd: (addr keyboard)<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: byte
<span id="L3" class="LineNr">3 </span><span class="PreProc">sig</span> <a href='103grapheme.subx.html#L1'>draw-grapheme</a> screen: (addr screen), g: grapheme, x: int, y: int, color: int
<span id="L4" class="LineNr">4 </span>
<span id="L5" class="LineNr">5 </span><span class="PreProc">sig</span> <a href='108write.subx.html#L5'>write</a> f: (addr stream byte), s: (addr array byte)
<span id="L6" class="LineNr">6 </span><span class="PreProc">sig</span> <a href='115write-byte.subx.html#L6'>append-byte</a> f: (addr stream byte), n: int
<span id="L7" class="LineNr">7 </span><span class="PreProc">sig</span> <a href='112read-byte.subx.html#L9'>read-byte</a> s: (addr stream byte)<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: byte
<span id="L8" class="LineNr">8 </span><span class="PreProc">sig</span> <a href='309stream.subx.html#L6'>stream-empty?</a> s: (addr stream _)<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: boolean
<span id="L1" class="LineNr"> 1 </span><span class="PreProc">sig</span> <a href='101screen.subx.html#L3'>pixel</a> screen: (addr screen), x: int, y: int, color: int
<span id="L2" class="LineNr"> 2 </span><span class="PreProc">sig</span> <a href='102keyboard.subx.html#L3'>read-key</a> kbd: (addr keyboard)<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: byte
<span id="L3" class="LineNr"> 3 </span><span class="PreProc">sig</span> <a href='103grapheme.subx.html#L1'>draw-grapheme</a> screen: (addr screen), g: grapheme, x: int, y: int, color: int
<span id="L4" class="LineNr"> 4 </span><span class="PreProc">sig</span> <a href='103grapheme.subx.html#L73'>cursor-position</a> screen: (addr screen)<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int, _/<span class="Constant">ecx</span>: int
<span id="L5" class="LineNr"> 5 </span><span class="PreProc">sig</span> <a href='103grapheme.subx.html#L86'>set-cursor-position</a> screen: (addr screen), x: int, y: int
<span id="L6" class="LineNr"> 6 </span><span class="PreProc">sig</span> <a href='106stream.subx.html#L17'>clear-stream</a> f: (addr stream _)
<span id="L7" class="LineNr"> 7 </span><span class="PreProc">sig</span> <a href='106stream.subx.html#L56'>rewind-stream</a> f: (addr stream _)
<span id="L8" class="LineNr"> 8 </span><span class="PreProc">sig</span> <a href='108write.subx.html#L5'>write</a> f: (addr stream byte), s: (addr array byte)
<span id="L9" class="LineNr"> 9 </span><span class="PreProc">sig</span> <a href='115write-byte.subx.html#L6'>append-byte</a> f: (addr stream byte), n: int
<span id="L10" class="LineNr">10 </span><span class="PreProc">sig</span> <a href='112read-byte.subx.html#L9'>read-byte</a> s: (addr stream byte)<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: byte
<span id="L11" class="LineNr">11 </span><span class="PreProc">sig</span> <a href='309stream.subx.html#L6'>stream-empty?</a> s: (addr stream _)<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: boolean
</pre>
</body>
</html>

16
html/baremetal/403unicode.mu.html generated
View File

@ -14,13 +14,13 @@ pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-
body { font-size:12pt; font-family: monospace; color: #000000; background-color: #c6c6c6; }
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.muComment { color: #005faf; }
.PreProc { color: #c000c0; }
.LineNr { }
.Delimiter { color: #c000c0; }
.SpecialChar { color: #d70000; }
.Constant { color: #008787; }
.muFunction { color: #af5f00; text-decoration: underline; }
.Delimiter { color: #c000c0; }
.PreProc { color: #c000c0; }
.muComment { color: #005faf; }
-->
</style>
@ -77,7 +77,7 @@ if ('onhashchange' in window) {
<span id="L19" class="LineNr"> 19 </span><span class="muComment">#</span>
<span id="L20" class="LineNr"> 20 </span><span class="muComment"># The day we want to support combining characters, this function will need to</span>
<span id="L21" class="LineNr"> 21 </span><span class="muComment"># take multiple code points. Or something.</span>
<span id="L22" class="LineNr"> 22 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='403unicode.mu.html#L22'>to-grapheme</a></span> in: code-point<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: grapheme <span class="Delimiter">{</span>
<span id="L22" class="LineNr"> 22 </span><span class="PreProc">fn</span> <span class="muFunction">to-grapheme</span> in: code-point<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: grapheme <span class="Delimiter">{</span>
<span id="L23" class="LineNr"> 23 </span> <span class="PreProc">var</span> c/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy in
<span id="L24" class="LineNr"> 24 </span> <span class="PreProc">var</span> num-trailers/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L25" class="LineNr"> 25 </span> <span class="PreProc">var</span> first/<span class="Constant">edx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
@ -147,7 +147,7 @@ if ('onhashchange' in window) {
<span id="L89" class="LineNr"> 89 </span><span class="muComment"># TODO: bring in tests once we have check-ints-equal</span>
<span id="L90" class="LineNr"> 90 </span>
<span id="L91" class="LineNr"> 91 </span><span class="muComment"># read the next grapheme from a stream of bytes</span>
<span id="L92" class="LineNr"> 92 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='403unicode.mu.html#L92'>read-grapheme</a></span> in: (addr stream byte)<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: grapheme <span class="Delimiter">{</span>
<span id="L92" class="LineNr"> 92 </span><span class="PreProc">fn</span> <span class="muFunction">read-grapheme</span> in: (addr stream byte)<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: grapheme <span class="Delimiter">{</span>
<span id="L93" class="LineNr"> 93 </span> <span class="muComment"># if at eof, return EOF</span>
<span id="L94" class="LineNr"> 94 </span> <span class="Delimiter">{</span>
<span id="L95" class="LineNr"> 95 </span> <span class="PreProc">var</span> eof?/<span class="Constant">eax</span>: boolean <span class="SpecialChar">&lt;-</span> <a href='309stream.subx.html#L6'>stream-empty?</a> in
@ -203,7 +203,7 @@ if ('onhashchange' in window) {
<span id="L145" class="LineNr">145 </span> <span class="PreProc">break-if-&lt;=</span>
<span id="L146" class="LineNr">146 </span> <span class="PreProc">var</span> tmp/<span class="Constant">eax</span>: byte <span class="SpecialChar">&lt;-</span> <a href='112read-byte.subx.html#L9'>read-byte</a> in
<span id="L147" class="LineNr">147 </span> <span class="PreProc">var</span> tmp2/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy tmp
<span id="L148" class="LineNr">148 </span> tmp2 <span class="SpecialChar">&lt;-</span> <a href='403unicode.mu.html#L159'>shift-left-bytes</a> tmp2, num-byte-shifts
<span id="L148" class="LineNr">148 </span> tmp2 <span class="SpecialChar">&lt;-</span> shift-left-bytes tmp2, num-byte-shifts
<span id="L149" class="LineNr">149 </span> result <span class="SpecialChar">&lt;-</span> or tmp2
<span id="L150" class="LineNr">150 </span> <span class="muComment"># update loop state</span>
<span id="L151" class="LineNr">151 </span> num-byte-shifts <span class="SpecialChar">&lt;-</span> increment
@ -214,7 +214,7 @@ if ('onhashchange' in window) {
<span id="L156" class="LineNr">156 </span><span class="Delimiter">}</span>
<span id="L157" class="LineNr">157 </span>
<span id="L158" class="LineNr">158 </span><span class="muComment"># needed because available primitives only shift by a literal/constant number of bits</span>
<span id="L159" class="LineNr">159 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='403unicode.mu.html#L159'>shift-left-bytes</a></span> n: int, k: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int <span class="Delimiter">{</span>
<span id="L159" class="LineNr">159 </span><span class="PreProc">fn</span> <span class="muFunction">shift-left-bytes</span> n: int, k: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int <span class="Delimiter">{</span>
<span id="L160" class="LineNr">160 </span> <span class="PreProc">var</span> i/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L161" class="LineNr">161 </span> <span class="PreProc">var</span> result/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy n
<span id="L162" class="LineNr">162 </span> <span class="Delimiter">{</span>
@ -231,7 +231,7 @@ if ('onhashchange' in window) {
<span id="L173" class="LineNr">173 </span>
<span id="L174" class="LineNr">174 </span><span class="muComment"># write a grapheme to a stream of bytes</span>
<span id="L175" class="LineNr">175 </span><span class="muComment"># this is like write-to-stream, except we skip leading 0 bytes</span>
<span id="L176" class="LineNr">176 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='403unicode.mu.html#L176'>write-grapheme</a></span> out: (addr stream byte), g: grapheme <span class="Delimiter">{</span>
<span id="L176" class="LineNr">176 </span><span class="PreProc">fn</span> <span class="muFunction">write-grapheme</span> out: (addr stream byte), g: grapheme <span class="Delimiter">{</span>
<span id="L177" class="LineNr">177 </span>$write-grapheme:body: <span class="Delimiter">{</span>
<span id="L178" class="LineNr">178 </span> <span class="PreProc">var</span> c/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy g
<span id="L179" class="LineNr">179 </span> <a href='115write-byte.subx.html#L6'>append-byte</a> out, c <span class="muComment"># first byte is always written</span>

284
html/baremetal/501draw-text.mu.html generated
View File

@ -14,13 +14,13 @@ pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-
body { font-size:12pt; font-family: monospace; color: #000000; background-color: #c6c6c6; }
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.muComment { color: #005faf; }
.LineNr { }
.SpecialChar { color: #d70000; }
.Delimiter { color: #c000c0; }
.muFunction { color: #af5f00; text-decoration: underline; }
.Constant { color: #008787; }
.PreProc { color: #c000c0; }
.LineNr { }
.Delimiter { color: #c000c0; }
.SpecialChar { color: #d70000; }
.Constant { color: #008787; }
.muFunction { color: #af5f00; text-decoration: underline; }
.muComment { color: #005faf; }
-->
</style>
@ -56,19 +56,265 @@ if ('onhashchange' in window) {
<body onload='JumpToLine();'>
<a href='https://github.com/akkartik/mu/blob/main/baremetal/501draw-text.mu'>https://github.com/akkartik/mu/blob/main/baremetal/501draw-text.mu</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='501draw-text.mu.html#L1'>draw-text-rightward</a></span> screen: (addr screen), text: (addr array byte), x: int, y: int, color: int <span class="Delimiter">{</span>
<span id="L2" class="LineNr"> 2 </span> <span class="PreProc">var</span> stream-storage: (stream byte <span class="Constant">0x100</span>)
<span id="L3" class="LineNr"> 3 </span> <span class="PreProc">var</span> stream/<span class="Constant">esi</span>: (addr stream byte) <span class="SpecialChar">&lt;-</span> address stream-storage
<span id="L4" class="LineNr"> 4 </span> <a href='108write.subx.html#L5'>write</a> stream, text
<span id="L5" class="LineNr"> 5 </span> <span class="Delimiter">{</span>
<span id="L6" class="LineNr"> 6 </span> <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="SpecialChar">&lt;-</span> <a href='403unicode.mu.html#L92'>read-grapheme</a> stream
<span id="L7" class="LineNr"> 7 </span> compare g, <span class="Constant">0xffffffff</span> <span class="muComment"># end-of-file</span>
<span id="L8" class="LineNr"> 8 </span> <span class="PreProc">break-if-=</span>
<span id="L9" class="LineNr"> 9 </span> <a href='103grapheme.subx.html#L1'>draw-grapheme</a> screen, g, x, y, color
<span id="L10" class="LineNr">10 </span> add-to x, <span class="Constant">8</span> <span class="muComment"># font-width</span>
<span id="L11" class="LineNr">11 </span> <span class="PreProc">loop</span>
<span id="L12" class="LineNr">12 </span> <span class="Delimiter">}</span>
<span id="L13" class="LineNr">13 </span><span class="Delimiter">}</span>
<span id="L1" class="LineNr"> 1 </span><span class="muComment"># draw a single line of text from x, y to xmax</span>
<span id="L2" class="LineNr"> 2 </span><span class="muComment"># return the next 'x' coordinate</span>
<span id="L3" class="LineNr"> 3 </span><span class="muComment"># if there isn't enough space, return 0 without modifying the screen</span>
<span id="L4" class="LineNr"> 4 </span><span class="PreProc">fn</span> <span class="muFunction">draw-text-rightward</span> screen: (addr screen), text: (addr array byte), x: int, xmax: int, y: int, color: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int <span class="Delimiter">{</span>
<span id="L5" class="LineNr"> 5 </span> <span class="PreProc">var</span> stream-storage: (stream byte <span class="Constant">0x100</span>)
<span id="L6" class="LineNr"> 6 </span> <span class="PreProc">var</span> stream/<span class="Constant">esi</span>: (addr stream byte) <span class="SpecialChar">&lt;-</span> address stream-storage
<span id="L7" class="LineNr"> 7 </span> <a href='108write.subx.html#L5'>write</a> stream, text
<span id="L8" class="LineNr"> 8 </span> <span class="muComment"># check if we have enough space</span>
<span id="L9" class="LineNr"> 9 </span> <span class="PreProc">var</span> xcurr/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy x
<span id="L10" class="LineNr"> 10 </span> <span class="Delimiter">{</span>
<span id="L11" class="LineNr"> 11 </span> compare xcurr, xmax
<span id="L12" class="LineNr"> 12 </span> <span class="PreProc">break-if-&gt;</span>
<span id="L13" class="LineNr"> 13 </span> <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="SpecialChar">&lt;-</span> read-grapheme stream
<span id="L14" class="LineNr"> 14 </span> compare g, <span class="Constant">0xffffffff</span> <span class="muComment"># end-of-file</span>
<span id="L15" class="LineNr"> 15 </span> <span class="PreProc">break-if-=</span>
<span id="L16" class="LineNr"> 16 </span> xcurr <span class="SpecialChar">&lt;-</span> add <span class="Constant">8</span> <span class="muComment"># font-width</span>
<span id="L17" class="LineNr"> 17 </span> <span class="PreProc">loop</span>
<span id="L18" class="LineNr"> 18 </span> <span class="Delimiter">}</span>
<span id="L19" class="LineNr"> 19 </span> compare xcurr, xmax
<span id="L20" class="LineNr"> 20 </span> <span class="Delimiter">{</span>
<span id="L21" class="LineNr"> 21 </span> <span class="PreProc">break-if-&lt;=</span>
<span id="L22" class="LineNr"> 22 </span> <span class="PreProc">return</span> <span class="Constant">0</span>
<span id="L23" class="LineNr"> 23 </span> <span class="Delimiter">}</span>
<span id="L24" class="LineNr"> 24 </span> <span class="muComment"># we do; actually draw</span>
<span id="L25" class="LineNr"> 25 </span> <a href='106stream.subx.html#L56'>rewind-stream</a> stream
<span id="L26" class="LineNr"> 26 </span> xcurr <span class="SpecialChar">&lt;-</span> copy x
<span id="L27" class="LineNr"> 27 </span> <span class="Delimiter">{</span>
<span id="L28" class="LineNr"> 28 </span> <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="SpecialChar">&lt;-</span> read-grapheme stream
<span id="L29" class="LineNr"> 29 </span> compare g, <span class="Constant">0xffffffff</span> <span class="muComment"># end-of-file</span>
<span id="L30" class="LineNr"> 30 </span> <span class="PreProc">break-if-=</span>
<span id="L31" class="LineNr"> 31 </span> <a href='103grapheme.subx.html#L1'>draw-grapheme</a> screen, g, xcurr, y, color
<span id="L32" class="LineNr"> 32 </span> xcurr <span class="SpecialChar">&lt;-</span> add <span class="Constant">8</span> <span class="muComment"># font-width</span>
<span id="L33" class="LineNr"> 33 </span> <span class="PreProc">loop</span>
<span id="L34" class="LineNr"> 34 </span> <span class="Delimiter">}</span>
<span id="L35" class="LineNr"> 35 </span> <a href='103grapheme.subx.html#L86'>set-cursor-position</a> screen, xcurr, y
<span id="L36" class="LineNr"> 36 </span> <span class="PreProc">return</span> xcurr
<span id="L37" class="LineNr"> 37 </span><span class="Delimiter">}</span>
<span id="L38" class="LineNr"> 38 </span>
<span id="L39" class="LineNr"> 39 </span><span class="PreProc">fn</span> <span class="muFunction">draw-text-rightward-from-cursor</span> screen: (addr screen), text: (addr array byte), xmax: int, color: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int <span class="Delimiter">{</span>
<span id="L40" class="LineNr"> 40 </span> <span class="PreProc">var</span> cursor-x/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L41" class="LineNr"> 41 </span> <span class="PreProc">var</span> cursor-y/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L42" class="LineNr"> 42 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='103grapheme.subx.html#L73'>cursor-position</a> screen
<span id="L43" class="LineNr"> 43 </span> <span class="PreProc">var</span> result/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> draw-text-rightward screen, text, cursor-x, xmax, cursor-y, color
<span id="L44" class="LineNr"> 44 </span> <span class="PreProc">return</span> result
<span id="L45" class="LineNr"> 45 </span><span class="Delimiter">}</span>
<span id="L46" class="LineNr"> 46 </span>
<span id="L47" class="LineNr"> 47 </span><span class="muComment"># draw text in the rectangle from (xmin, ymin) to (xmax, ymax), starting from (x, y), wrapping as necessary</span>
<span id="L48" class="LineNr"> 48 </span><span class="muComment"># return the next (x, y) coordinate in raster order where drawing stopped</span>
<span id="L49" class="LineNr"> 49 </span><span class="muComment"># that way the caller can draw more if given the same min and max bounding-box.</span>
<span id="L50" class="LineNr"> 50 </span><span class="muComment"># if there isn't enough space, return 0 without modifying the screen</span>
<span id="L51" class="LineNr"> 51 </span><span class="PreProc">fn</span> <span class="muFunction">draw-text-wrapping-right-then-down</span> screen: (addr screen), text: (addr array byte), xmin: int, ymin: int, xmax: int, ymax: int, x: int, y: int, color: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int, _/<span class="Constant">ecx</span>: int <span class="Delimiter">{</span>
<span id="L52" class="LineNr"> 52 </span> <span class="PreProc">var</span> stream-storage: (stream byte <span class="Constant">0x100</span>)
<span id="L53" class="LineNr"> 53 </span> <span class="PreProc">var</span> stream/<span class="Constant">esi</span>: (addr stream byte) <span class="SpecialChar">&lt;-</span> address stream-storage
<span id="L54" class="LineNr"> 54 </span> <a href='108write.subx.html#L5'>write</a> stream, text
<span id="L55" class="LineNr"> 55 </span> <span class="muComment"># check if we have enough space</span>
<span id="L56" class="LineNr"> 56 </span> <span class="PreProc">var</span> xcurr/<span class="Constant">edx</span>: int <span class="SpecialChar">&lt;-</span> copy x
<span id="L57" class="LineNr"> 57 </span> <span class="PreProc">var</span> ycurr/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy y
<span id="L58" class="LineNr"> 58 </span> <span class="Delimiter">{</span>
<span id="L59" class="LineNr"> 59 </span> compare ycurr, ymax
<span id="L60" class="LineNr"> 60 </span> <span class="PreProc">break-if-&gt;=</span>
<span id="L61" class="LineNr"> 61 </span> <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="SpecialChar">&lt;-</span> read-grapheme stream
<span id="L62" class="LineNr"> 62 </span> compare g, <span class="Constant">0xffffffff</span> <span class="muComment"># end-of-file</span>
<span id="L63" class="LineNr"> 63 </span> <span class="PreProc">break-if-=</span>
<span id="L64" class="LineNr"> 64 </span> xcurr <span class="SpecialChar">&lt;-</span> add <span class="Constant">8</span> <span class="muComment"># font-width</span>
<span id="L65" class="LineNr"> 65 </span> compare xcurr, xmax
<span id="L66" class="LineNr"> 66 </span> <span class="Delimiter">{</span>
<span id="L67" class="LineNr"> 67 </span> <span class="PreProc">break-if-&lt;</span>
<span id="L68" class="LineNr"> 68 </span> xcurr <span class="SpecialChar">&lt;-</span> copy xmin
<span id="L69" class="LineNr"> 69 </span> ycurr <span class="SpecialChar">&lt;-</span> add <span class="Constant">0x10</span> <span class="muComment"># font-height</span>
<span id="L70" class="LineNr"> 70 </span> <span class="Delimiter">}</span>
<span id="L71" class="LineNr"> 71 </span> <span class="PreProc">loop</span>
<span id="L72" class="LineNr"> 72 </span> <span class="Delimiter">}</span>
<span id="L73" class="LineNr"> 73 </span> compare ycurr, ymax
<span id="L74" class="LineNr"> 74 </span> <span class="Delimiter">{</span>
<span id="L75" class="LineNr"> 75 </span> <span class="PreProc">break-if-&lt;</span>
<span id="L76" class="LineNr"> 76 </span> <span class="PreProc">return</span> <span class="Constant">0</span>, <span class="Constant">0</span>
<span id="L77" class="LineNr"> 77 </span> <span class="Delimiter">}</span>
<span id="L78" class="LineNr"> 78 </span> <span class="muComment"># we do; actually draw</span>
<span id="L79" class="LineNr"> 79 </span> <a href='106stream.subx.html#L56'>rewind-stream</a> stream
<span id="L80" class="LineNr"> 80 </span> xcurr <span class="SpecialChar">&lt;-</span> copy x
<span id="L81" class="LineNr"> 81 </span> ycurr <span class="SpecialChar">&lt;-</span> copy y
<span id="L82" class="LineNr"> 82 </span> <span class="Delimiter">{</span>
<span id="L83" class="LineNr"> 83 </span> <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="SpecialChar">&lt;-</span> read-grapheme stream
<span id="L84" class="LineNr"> 84 </span> compare g, <span class="Constant">0xffffffff</span> <span class="muComment"># end-of-file</span>
<span id="L85" class="LineNr"> 85 </span> <span class="PreProc">break-if-=</span>
<span id="L86" class="LineNr"> 86 </span> <a href='103grapheme.subx.html#L1'>draw-grapheme</a> screen, g, xcurr, ycurr, color
<span id="L87" class="LineNr"> 87 </span> xcurr <span class="SpecialChar">&lt;-</span> add <span class="Constant">8</span> <span class="muComment"># font-width</span>
<span id="L88" class="LineNr"> 88 </span> compare xcurr, xmax
<span id="L89" class="LineNr"> 89 </span> <span class="Delimiter">{</span>
<span id="L90" class="LineNr"> 90 </span> <span class="PreProc">break-if-&lt;</span>
<span id="L91" class="LineNr"> 91 </span> xcurr <span class="SpecialChar">&lt;-</span> copy xmin
<span id="L92" class="LineNr"> 92 </span> ycurr <span class="SpecialChar">&lt;-</span> add <span class="Constant">0x10</span> <span class="muComment"># font-height</span>
<span id="L93" class="LineNr"> 93 </span> <span class="Delimiter">}</span>
<span id="L94" class="LineNr"> 94 </span> <span class="PreProc">loop</span>
<span id="L95" class="LineNr"> 95 </span> <span class="Delimiter">}</span>
<span id="L96" class="LineNr"> 96 </span> <a href='103grapheme.subx.html#L86'>set-cursor-position</a> screen, xcurr, ycurr
<span id="L97" class="LineNr"> 97 </span> <span class="PreProc">return</span> xcurr, ycurr
<span id="L98" class="LineNr"> 98 </span><span class="Delimiter">}</span>
<span id="L99" class="LineNr"> 99 </span>
<span id="L100" class="LineNr">100 </span><span class="PreProc">fn</span> <span class="muFunction">draw-text-wrapping-right-then-down-over-full-screen</span> screen: (addr screen), text: (addr array byte), x: int, y: int, color: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int, _/<span class="Constant">ecx</span>: int <span class="Delimiter">{</span>
<span id="L101" class="LineNr">101 </span> <span class="PreProc">var</span> cursor-x/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L102" class="LineNr">102 </span> <span class="PreProc">var</span> cursor-y/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L103" class="LineNr">103 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> draw-text-wrapping-right-then-down screen, text, <span class="Constant">0</span>, <span class="Constant">0</span>, <span class="Constant">0x400</span>, <span class="Constant">0x300</span>, x, y, color <span class="muComment"># 1024, 768</span>
<span id="L104" class="LineNr">104 </span> <span class="PreProc">return</span> cursor-x, cursor-y
<span id="L105" class="LineNr">105 </span><span class="Delimiter">}</span>
<span id="L106" class="LineNr">106 </span>
<span id="L107" class="LineNr">107 </span><span class="PreProc">fn</span> <span class="muFunction">draw-text-wrapping-right-then-down-from-cursor</span> screen: (addr screen), text: (addr array byte), xmin: int, ymin: int, xmax: int, ymax: int, color: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int, _/<span class="Constant">ecx</span>: int <span class="Delimiter">{</span>
<span id="L108" class="LineNr">108 </span> <span class="PreProc">var</span> cursor-x/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L109" class="LineNr">109 </span> <span class="PreProc">var</span> cursor-y/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L110" class="LineNr">110 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='103grapheme.subx.html#L73'>cursor-position</a> screen
<span id="L111" class="LineNr">111 </span> <span class="PreProc">var</span> end-x/<span class="Constant">edx</span>: int <span class="SpecialChar">&lt;-</span> copy cursor-x
<span id="L112" class="LineNr">112 </span> end-x <span class="SpecialChar">&lt;-</span> add <span class="Constant">8</span> <span class="muComment"># font-width</span>
<span id="L113" class="LineNr">113 </span> compare end-x, xmax
<span id="L114" class="LineNr">114 </span> <span class="Delimiter">{</span>
<span id="L115" class="LineNr">115 </span> <span class="PreProc">break-if-&lt;</span>
<span id="L116" class="LineNr">116 </span> cursor-x <span class="SpecialChar">&lt;-</span> copy xmin
<span id="L117" class="LineNr">117 </span> cursor-y <span class="SpecialChar">&lt;-</span> add <span class="Constant">0x10</span> <span class="muComment"># font-height</span>
<span id="L118" class="LineNr">118 </span> <span class="Delimiter">}</span>
<span id="L119" class="LineNr">119 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> draw-text-wrapping-right-then-down screen, text, xmin, ymin, xmax, ymax, cursor-x, cursor-y, color
<span id="L120" class="LineNr">120 </span> <span class="PreProc">return</span> cursor-x, cursor-y
<span id="L121" class="LineNr">121 </span><span class="Delimiter">}</span>
<span id="L122" class="LineNr">122 </span>
<span id="L123" class="LineNr">123 </span><span class="PreProc">fn</span> <span class="muFunction">draw-text-wrapping-right-then-down-from-cursor-over-full-screen</span> screen: (addr screen), text: (addr array byte), color: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int, _/<span class="Constant">ecx</span>: int <span class="Delimiter">{</span>
<span id="L124" class="LineNr">124 </span> <span class="PreProc">var</span> cursor-x/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L125" class="LineNr">125 </span> <span class="PreProc">var</span> cursor-y/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L126" class="LineNr">126 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> draw-text-wrapping-right-then-down-from-cursor screen, text, <span class="Constant">0</span>, <span class="Constant">0</span>, <span class="Constant">0x400</span>, <span class="Constant">0x300</span>, color <span class="muComment"># 1024, 768</span>
<span id="L127" class="LineNr">127 </span> <span class="PreProc">return</span> cursor-x, cursor-y
<span id="L128" class="LineNr">128 </span><span class="Delimiter">}</span>
<span id="L129" class="LineNr">129 </span>
<span id="L130" class="LineNr">130 </span><span class="muComment">## Text direction: down then right</span>
<span id="L131" class="LineNr">131 </span>
<span id="L132" class="LineNr">132 </span><span class="muComment"># draw a single line of text vertically from x, y to ymax</span>
<span id="L133" class="LineNr">133 </span><span class="muComment"># return the next 'y' coordinate</span>
<span id="L134" class="LineNr">134 </span><span class="muComment"># if there isn't enough space, return 0 without modifying the screen</span>
<span id="L135" class="LineNr">135 </span><span class="PreProc">fn</span> <span class="muFunction">draw-text-downward</span> screen: (addr screen), text: (addr array byte), x: int, y: int, ymax: int, color: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int <span class="Delimiter">{</span>
<span id="L136" class="LineNr">136 </span> <span class="PreProc">var</span> stream-storage: (stream byte <span class="Constant">0x100</span>)
<span id="L137" class="LineNr">137 </span> <span class="PreProc">var</span> stream/<span class="Constant">esi</span>: (addr stream byte) <span class="SpecialChar">&lt;-</span> address stream-storage
<span id="L138" class="LineNr">138 </span> <a href='108write.subx.html#L5'>write</a> stream, text
<span id="L139" class="LineNr">139 </span> <span class="muComment"># check if we have enough space</span>
<span id="L140" class="LineNr">140 </span> <span class="PreProc">var</span> ycurr/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy y
<span id="L141" class="LineNr">141 </span> <span class="Delimiter">{</span>
<span id="L142" class="LineNr">142 </span> compare ycurr, ymax
<span id="L143" class="LineNr">143 </span> <span class="PreProc">break-if-&gt;</span>
<span id="L144" class="LineNr">144 </span> <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="SpecialChar">&lt;-</span> read-grapheme stream
<span id="L145" class="LineNr">145 </span> compare g, <span class="Constant">0xffffffff</span> <span class="muComment"># end-of-file</span>
<span id="L146" class="LineNr">146 </span> <span class="PreProc">break-if-=</span>
<span id="L147" class="LineNr">147 </span> ycurr <span class="SpecialChar">&lt;-</span> add <span class="Constant">0x10</span> <span class="muComment"># font-height</span>
<span id="L148" class="LineNr">148 </span> <span class="PreProc">loop</span>
<span id="L149" class="LineNr">149 </span> <span class="Delimiter">}</span>
<span id="L150" class="LineNr">150 </span> compare ycurr, ymax
<span id="L151" class="LineNr">151 </span> <span class="Delimiter">{</span>
<span id="L152" class="LineNr">152 </span> <span class="PreProc">break-if-&lt;=</span>
<span id="L153" class="LineNr">153 </span> <span class="PreProc">return</span> <span class="Constant">0</span>
<span id="L154" class="LineNr">154 </span> <span class="Delimiter">}</span>
<span id="L155" class="LineNr">155 </span> <span class="muComment"># we do; actually draw</span>
<span id="L156" class="LineNr">156 </span> <a href='106stream.subx.html#L56'>rewind-stream</a> stream
<span id="L157" class="LineNr">157 </span> ycurr <span class="SpecialChar">&lt;-</span> copy y
<span id="L158" class="LineNr">158 </span> <span class="Delimiter">{</span>
<span id="L159" class="LineNr">159 </span> <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="SpecialChar">&lt;-</span> read-grapheme stream
<span id="L160" class="LineNr">160 </span> compare g, <span class="Constant">0xffffffff</span> <span class="muComment"># end-of-file</span>
<span id="L161" class="LineNr">161 </span> <span class="PreProc">break-if-=</span>
<span id="L162" class="LineNr">162 </span> <a href='103grapheme.subx.html#L1'>draw-grapheme</a> screen, g, x, ycurr, color
<span id="L163" class="LineNr">163 </span> ycurr <span class="SpecialChar">&lt;-</span> add <span class="Constant">0x10</span> <span class="muComment"># font-height</span>
<span id="L164" class="LineNr">164 </span> <span class="PreProc">loop</span>
<span id="L165" class="LineNr">165 </span> <span class="Delimiter">}</span>
<span id="L166" class="LineNr">166 </span> <a href='103grapheme.subx.html#L86'>set-cursor-position</a> screen, x, ycurr
<span id="L167" class="LineNr">167 </span> <span class="PreProc">return</span> ycurr
<span id="L168" class="LineNr">168 </span><span class="Delimiter">}</span>
<span id="L169" class="LineNr">169 </span>
<span id="L170" class="LineNr">170 </span><span class="PreProc">fn</span> <span class="muFunction">draw-text-downward-from-cursor</span> screen: (addr screen), text: (addr array byte), ymax: int, color: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int <span class="Delimiter">{</span>
<span id="L171" class="LineNr">171 </span> <span class="PreProc">var</span> cursor-x/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L172" class="LineNr">172 </span> <span class="PreProc">var</span> cursor-y/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L173" class="LineNr">173 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='103grapheme.subx.html#L73'>cursor-position</a> screen
<span id="L174" class="LineNr">174 </span> <span class="PreProc">var</span> result/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> draw-text-downward screen, text, cursor-x, cursor-y, ymax, color
<span id="L175" class="LineNr">175 </span> <span class="PreProc">return</span> result
<span id="L176" class="LineNr">176 </span><span class="Delimiter">}</span>
<span id="L177" class="LineNr">177 </span>
<span id="L178" class="LineNr">178 </span><span class="muComment"># draw text down and right in the rectangle from (xmin, ymin) to (xmax, ymax), starting from (x, y), wrapping as necessary</span>
<span id="L179" class="LineNr">179 </span><span class="muComment"># return the next (x, y) coordinate in raster order where drawing stopped</span>
<span id="L180" class="LineNr">180 </span><span class="muComment"># that way the caller can draw more if given the same min and max bounding-box.</span>
<span id="L181" class="LineNr">181 </span><span class="muComment"># if there isn't enough space, return 0 without modifying the screen</span>
<span id="L182" class="LineNr">182 </span><span class="PreProc">fn</span> <span class="muFunction">draw-text-wrapping-down-then-right</span> screen: (addr screen), text: (addr array byte), xmin: int, ymin: int, xmax: int, ymax: int, x: int, y: int, color: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int, _/<span class="Constant">ecx</span>: int <span class="Delimiter">{</span>
<span id="L183" class="LineNr">183 </span> <span class="PreProc">var</span> stream-storage: (stream byte <span class="Constant">0x100</span>)
<span id="L184" class="LineNr">184 </span> <span class="PreProc">var</span> stream/<span class="Constant">esi</span>: (addr stream byte) <span class="SpecialChar">&lt;-</span> address stream-storage
<span id="L185" class="LineNr">185 </span> <a href='108write.subx.html#L5'>write</a> stream, text
<span id="L186" class="LineNr">186 </span> <span class="muComment"># check if we have enough space</span>
<span id="L187" class="LineNr">187 </span> <span class="PreProc">var</span> xcurr/<span class="Constant">edx</span>: int <span class="SpecialChar">&lt;-</span> copy x
<span id="L188" class="LineNr">188 </span> <span class="PreProc">var</span> ycurr/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy y
<span id="L189" class="LineNr">189 </span> <span class="Delimiter">{</span>
<span id="L190" class="LineNr">190 </span> compare xcurr, xmax
<span id="L191" class="LineNr">191 </span> <span class="PreProc">break-if-&gt;=</span>
<span id="L192" class="LineNr">192 </span> <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="SpecialChar">&lt;-</span> read-grapheme stream
<span id="L193" class="LineNr">193 </span> compare g, <span class="Constant">0xffffffff</span> <span class="muComment"># end-of-file</span>
<span id="L194" class="LineNr">194 </span> <span class="PreProc">break-if-=</span>
<span id="L195" class="LineNr">195 </span> ycurr <span class="SpecialChar">&lt;-</span> add <span class="Constant">0x10</span> <span class="muComment"># font-height</span>
<span id="L196" class="LineNr">196 </span> compare ycurr, ymax
<span id="L197" class="LineNr">197 </span> <span class="Delimiter">{</span>
<span id="L198" class="LineNr">198 </span> <span class="PreProc">break-if-&lt;</span>
<span id="L199" class="LineNr">199 </span> xcurr <span class="SpecialChar">&lt;-</span> add <span class="Constant">8</span> <span class="muComment"># font-width</span>
<span id="L200" class="LineNr">200 </span> ycurr <span class="SpecialChar">&lt;-</span> copy ymin
<span id="L201" class="LineNr">201 </span> <span class="Delimiter">}</span>
<span id="L202" class="LineNr">202 </span> <span class="PreProc">loop</span>
<span id="L203" class="LineNr">203 </span> <span class="Delimiter">}</span>
<span id="L204" class="LineNr">204 </span> compare xcurr, xmax
<span id="L205" class="LineNr">205 </span> <span class="Delimiter">{</span>
<span id="L206" class="LineNr">206 </span> <span class="PreProc">break-if-&lt;</span>
<span id="L207" class="LineNr">207 </span> <span class="PreProc">return</span> <span class="Constant">0</span>, <span class="Constant">0</span>
<span id="L208" class="LineNr">208 </span> <span class="Delimiter">}</span>
<span id="L209" class="LineNr">209 </span> <span class="muComment"># we do; actually draw</span>
<span id="L210" class="LineNr">210 </span> <a href='106stream.subx.html#L56'>rewind-stream</a> stream
<span id="L211" class="LineNr">211 </span> xcurr <span class="SpecialChar">&lt;-</span> copy x
<span id="L212" class="LineNr">212 </span> ycurr <span class="SpecialChar">&lt;-</span> copy y
<span id="L213" class="LineNr">213 </span> <span class="Delimiter">{</span>
<span id="L214" class="LineNr">214 </span> <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="SpecialChar">&lt;-</span> read-grapheme stream
<span id="L215" class="LineNr">215 </span> compare g, <span class="Constant">0xffffffff</span> <span class="muComment"># end-of-file</span>
<span id="L216" class="LineNr">216 </span> <span class="PreProc">break-if-=</span>
<span id="L217" class="LineNr">217 </span> <a href='103grapheme.subx.html#L1'>draw-grapheme</a> screen, g, xcurr, ycurr, color
<span id="L218" class="LineNr">218 </span> ycurr <span class="SpecialChar">&lt;-</span> add <span class="Constant">0x10</span> <span class="muComment"># font-height</span>
<span id="L219" class="LineNr">219 </span> compare ycurr, ymax
<span id="L220" class="LineNr">220 </span> <span class="Delimiter">{</span>
<span id="L221" class="LineNr">221 </span> <span class="PreProc">break-if-&lt;</span>
<span id="L222" class="LineNr">222 </span> xcurr <span class="SpecialChar">&lt;-</span> add <span class="Constant">8</span> <span class="muComment"># font-width</span>
<span id="L223" class="LineNr">223 </span> ycurr <span class="SpecialChar">&lt;-</span> copy ymin
<span id="L224" class="LineNr">224 </span> <span class="Delimiter">}</span>
<span id="L225" class="LineNr">225 </span> <span class="PreProc">loop</span>
<span id="L226" class="LineNr">226 </span> <span class="Delimiter">}</span>
<span id="L227" class="LineNr">227 </span> <a href='103grapheme.subx.html#L86'>set-cursor-position</a> screen, xcurr, ycurr
<span id="L228" class="LineNr">228 </span> <span class="PreProc">return</span> xcurr, ycurr
<span id="L229" class="LineNr">229 </span><span class="Delimiter">}</span>
<span id="L230" class="LineNr">230 </span>
<span id="L231" class="LineNr">231 </span><span class="PreProc">fn</span> <span class="muFunction">draw-text-wrapping-down-then-right-over-full-screen</span> screen: (addr screen), text: (addr array byte), x: int, y: int, color: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int, _/<span class="Constant">ecx</span>: int <span class="Delimiter">{</span>
<span id="L232" class="LineNr">232 </span> <span class="PreProc">var</span> cursor-x/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L233" class="LineNr">233 </span> <span class="PreProc">var</span> cursor-y/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L234" class="LineNr">234 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> draw-text-wrapping-down-then-right screen, text, <span class="Constant">0</span>, <span class="Constant">0</span>, <span class="Constant">0x400</span>, <span class="Constant">0x300</span>, x, y, color <span class="muComment"># 1024, 768</span>
<span id="L235" class="LineNr">235 </span> <span class="PreProc">return</span> cursor-x, cursor-y
<span id="L236" class="LineNr">236 </span><span class="Delimiter">}</span>
<span id="L237" class="LineNr">237 </span>
<span id="L238" class="LineNr">238 </span><span class="PreProc">fn</span> <span class="muFunction">draw-text-wrapping-down-then-right-from-cursor</span> screen: (addr screen), text: (addr array byte), xmin: int, ymin: int, xmax: int, ymax: int, color: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int, _/<span class="Constant">ecx</span>: int <span class="Delimiter">{</span>
<span id="L239" class="LineNr">239 </span> <span class="PreProc">var</span> cursor-x/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L240" class="LineNr">240 </span> <span class="PreProc">var</span> cursor-y/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L241" class="LineNr">241 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> <a href='103grapheme.subx.html#L73'>cursor-position</a> screen
<span id="L242" class="LineNr">242 </span> <span class="PreProc">var</span> end-y/<span class="Constant">edx</span>: int <span class="SpecialChar">&lt;-</span> copy cursor-y
<span id="L243" class="LineNr">243 </span> end-y <span class="SpecialChar">&lt;-</span> add <span class="Constant">0x10</span> <span class="muComment"># font-height</span>
<span id="L244" class="LineNr">244 </span> compare end-y, ymax
<span id="L245" class="LineNr">245 </span> <span class="Delimiter">{</span>
<span id="L246" class="LineNr">246 </span> <span class="PreProc">break-if-&lt;</span>
<span id="L247" class="LineNr">247 </span> cursor-x <span class="SpecialChar">&lt;-</span> add <span class="Constant">8</span> <span class="muComment"># font-width</span>
<span id="L248" class="LineNr">248 </span> cursor-y <span class="SpecialChar">&lt;-</span> copy ymin
<span id="L249" class="LineNr">249 </span> <span class="Delimiter">}</span>
<span id="L250" class="LineNr">250 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> draw-text-wrapping-down-then-right screen, text, xmin, ymin, xmax, ymax, cursor-x, cursor-y, color
<span id="L251" class="LineNr">251 </span> <span class="PreProc">return</span> cursor-x, cursor-y
<span id="L252" class="LineNr">252 </span><span class="Delimiter">}</span>
<span id="L253" class="LineNr">253 </span>
<span id="L254" class="LineNr">254 </span><span class="PreProc">fn</span> <span class="muFunction">draw-text-wrapping-down-then-right-from-cursor-over-full-screen</span> screen: (addr screen), text: (addr array byte), color: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int, _/<span class="Constant">ecx</span>: int <span class="Delimiter">{</span>
<span id="L255" class="LineNr">255 </span> <span class="PreProc">var</span> cursor-x/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L256" class="LineNr">256 </span> <span class="PreProc">var</span> cursor-y/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L257" class="LineNr">257 </span> cursor-x, cursor-y <span class="SpecialChar">&lt;-</span> draw-text-wrapping-down-then-right-from-cursor screen, text, <span class="Constant">0</span>, <span class="Constant">0</span>, <span class="Constant">0x400</span>, <span class="Constant">0x300</span>, color <span class="muComment"># 1024, 768</span>
<span id="L258" class="LineNr">258 </span> <span class="PreProc">return</span> cursor-x, cursor-y
<span id="L259" class="LineNr">259 </span><span class="Delimiter">}</span>
</pre>
</body>
</html>

89
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@ -0,0 +1,89 @@
<!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 - baremetal/502manhattan-line.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; }
.LineNr { }
.Constant { color: #008787; }
.SpecialChar { color: #d70000; }
.Delimiter { color: #c000c0; }
.muFunction { color: #af5f00; text-decoration: underline; }
-->
</style>
<script type='text/javascript'>
<!--
/* function to open any folds containing a jumped-to line before jumping to it */
function JumpToLine()
{
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lineNum = window.location.hash;
lineNum = lineNum.substr(1); /* strip off '#' */
if (lineNum.indexOf('L') == -1) {
lineNum = 'L'+lineNum;
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* we corrected the raw number to a line ID.
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}
return true;
}
if ('onhashchange' in window) {
window.onhashchange = JumpToLine;
}
-->
</script>
</head>
<body onload='JumpToLine();'>
<a href='https://github.com/akkartik/mu/blob/main/baremetal/502manhattan-line.mu'>https://github.com/akkartik/mu/blob/main/baremetal/502manhattan-line.mu</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="PreProc">fn</span> <span class="muFunction">draw-box</span> screen: (addr screen), x1: int, y1: int, x2: int, y2: int, color: int <span class="Delimiter">{</span>
<span id="L2" class="LineNr"> 2 </span> draw-horizontal-line screen, x1, x2, y1, color
<span id="L3" class="LineNr"> 3 </span> draw-vertical-line screen, x1, y1, y2, color
<span id="L4" class="LineNr"> 4 </span> draw-horizontal-line screen, x1, x2, y2, color
<span id="L5" class="LineNr"> 5 </span> draw-vertical-line screen, x2, y1, y2, color
<span id="L6" class="LineNr"> 6 </span><span class="Delimiter">}</span>
<span id="L7" class="LineNr"> 7 </span>
<span id="L8" class="LineNr"> 8 </span><span class="PreProc">fn</span> <span class="muFunction">draw-horizontal-line</span> screen: (addr screen), x1: int, x2: int, y: int, color: int <span class="Delimiter">{</span>
<span id="L9" class="LineNr"> 9 </span> <span class="PreProc">var</span> x/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy x1
<span id="L10" class="LineNr">10 </span> <span class="Delimiter">{</span>
<span id="L11" class="LineNr">11 </span> compare x, x2
<span id="L12" class="LineNr">12 </span> <span class="PreProc">break-if-&gt;=</span>
<span id="L13" class="LineNr">13 </span> <a href='101screen.subx.html#L3'>pixel</a> screen, x, y, color
<span id="L14" class="LineNr">14 </span> x <span class="SpecialChar">&lt;-</span> increment
<span id="L15" class="LineNr">15 </span> <span class="PreProc">loop</span>
<span id="L16" class="LineNr">16 </span> <span class="Delimiter">}</span>
<span id="L17" class="LineNr">17 </span><span class="Delimiter">}</span>
<span id="L18" class="LineNr">18 </span>
<span id="L19" class="LineNr">19 </span><span class="PreProc">fn</span> <span class="muFunction">draw-vertical-line</span> screen: (addr screen), x: int, y1: int, y2: int, color: int <span class="Delimiter">{</span>
<span id="L20" class="LineNr">20 </span> <span class="PreProc">var</span> y/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy y1
<span id="L21" class="LineNr">21 </span> <span class="Delimiter">{</span>
<span id="L22" class="LineNr">22 </span> compare y, y2
<span id="L23" class="LineNr">23 </span> <span class="PreProc">break-if-&gt;=</span>
<span id="L24" class="LineNr">24 </span> <a href='101screen.subx.html#L3'>pixel</a> screen, x, y, color
<span id="L25" class="LineNr">25 </span> y <span class="SpecialChar">&lt;-</span> increment
<span id="L26" class="LineNr">26 </span> <span class="PreProc">loop</span>
<span id="L27" class="LineNr">27 </span> <span class="Delimiter">}</span>
<span id="L28" class="LineNr">28 </span><span class="Delimiter">}</span>
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->

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@ -15,8 +15,8 @@ body { font-size:12pt; font-family: monospace; color: #000000; background-color:
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.subxComment { color: #005faf; }
.LineNr { }
.subxS1Comment { color: #0000af; }
.LineNr { }
.Folded { color: #080808; background-color: #949494; }
-->
</style>

2
html/baremetal/boot0.hex.html generated
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@ -14,9 +14,9 @@ pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-
body { font-size:12pt; font-family: monospace; color: #000000; background-color: #c6c6c6; }
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.Todo { color: #000000; background-color: #ffff00; padding-bottom: 1px; }
.LineNr { }
.Comment { color: #005faf; }
.Todo { color: #000000; background-color: #ffff00; padding-bottom: 1px; }
-->
</style>

8
html/baremetal/ex2.mu.html generated
View File

@ -14,13 +14,13 @@ pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-
body { font-size:12pt; font-family: monospace; color: #000000; background-color: #c6c6c6; }
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.muComment { color: #005faf; }
.PreProc { color: #c000c0; }
.LineNr { }
.Constant { color: #008787; }
.SpecialChar { color: #d70000; }
.Delimiter { color: #c000c0; }
.muFunction { color: #af5f00; text-decoration: underline; }
.Constant { color: #008787; }
.PreProc { color: #c000c0; }
.muComment { color: #005faf; }
-->
</style>
@ -68,7 +68,7 @@ if ('onhashchange' in window) {
<span id="L10" class="LineNr">10 </span><span class="muComment"># Expected output:</span>
<span id="L11" class="LineNr">11 </span><span class="muComment"># html/baremetal.png</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='ex2.mu.html#L13'>main</a></span> <span class="Delimiter">{</span>
<span id="L13" class="LineNr">13 </span><span class="PreProc">fn</span> <span class="muFunction">main</span> <span class="Delimiter">{</span>
<span id="L14" class="LineNr">14 </span> <span class="PreProc">var</span> y/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L15" class="LineNr">15 </span> <span class="Delimiter">{</span>
<span id="L16" class="LineNr">16 </span> compare y, <span class="Constant">0x300</span> <span class="muComment"># 768</span>

8
html/baremetal/ex3.mu.html generated
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@ -14,13 +14,13 @@ pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-
body { font-size:12pt; font-family: monospace; color: #000000; background-color: #c6c6c6; }
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.muComment { color: #005faf; }
.PreProc { color: #c000c0; }
.LineNr { }
.Constant { color: #008787; }
.SpecialChar { color: #d70000; }
.Delimiter { color: #c000c0; }
.muFunction { color: #af5f00; text-decoration: underline; }
.Constant { color: #008787; }
.PreProc { color: #c000c0; }
.muComment { color: #005faf; }
-->
</style>
@ -69,7 +69,7 @@ if ('onhashchange' in window) {
<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> <span class="Delimiter">{</span>
<span id="L14" class="LineNr">14 </span><span class="PreProc">fn</span> <span class="muFunction">main</span> <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="SpecialChar">&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="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L17" class="LineNr">17 </span> <span class="Delimiter">{</span>

8
html/baremetal/ex4.mu.html generated
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@ -14,13 +14,13 @@ pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-
body { font-size:12pt; font-family: monospace; color: #000000; background-color: #c6c6c6; }
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.muComment { color: #005faf; }
.PreProc { color: #c000c0; }
.LineNr { }
.Constant { color: #008787; }
.SpecialChar { color: #d70000; }
.Delimiter { color: #c000c0; }
.muFunction { color: #af5f00; text-decoration: underline; }
.Constant { color: #008787; }
.PreProc { color: #c000c0; }
.muComment { color: #005faf; }
-->
</style>
@ -67,7 +67,7 @@ if ('onhashchange' in window) {
<span id="L9" class="LineNr"> 9 </span><span class="muComment">#</span>
<span id="L10" class="LineNr">10 </span><span class="muComment"># Expected output: letter 'A' in green near the top-left corner of screen</span>
<span id="L11" class="LineNr">11 </span>
<span id="L12" class="LineNr">12 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='ex4.mu.html#L12'>main</a></span> <span class="Delimiter">{</span>
<span id="L12" class="LineNr">12 </span><span class="PreProc">fn</span> <span class="muFunction">main</span> <span class="Delimiter">{</span>
<span id="L13" class="LineNr">13 </span> <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0x41</span> <span class="muComment"># 'A'</span>
<span id="L14" class="LineNr">14 </span> <a href='103grapheme.subx.html#L1'>draw-grapheme</a> <span class="Constant">0</span>, g, <span class="Constant">0x10</span>, <span class="Constant">0x10</span>, <span class="Constant">0xa</span>
<span id="L15" class="LineNr">15 </span><span class="Delimiter">}</span>

37
html/baremetal/ex5.mu.html generated
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@ -14,12 +14,13 @@ pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-
body { font-size:12pt; font-family: monospace; color: #000000; background-color: #c6c6c6; }
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.muComment { color: #005faf; }
.PreProc { color: #c000c0; }
.LineNr { }
.Constant { color: #008787; }
.SpecialChar { color: #d70000; }
.Delimiter { color: #c000c0; }
.muFunction { color: #af5f00; text-decoration: underline; }
.Constant { color: #008787; }
.PreProc { color: #c000c0; }
.muComment { color: #005faf; }
-->
</style>
@ -55,20 +56,22 @@ if ('onhashchange' in window) {
<body onload='JumpToLine();'>
<a href='https://github.com/akkartik/mu/blob/main/baremetal/ex5.mu'>https://github.com/akkartik/mu/blob/main/baremetal/ex5.mu</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="muComment"># Draw an ASCII string using the built-in font (GNU unifont)</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_mu_baremetal baremetal/ex5.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 baremetal/boot.bochsrc # boot.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: text in green near the top-left corner of screen</span>
<span id="L11" class="LineNr">11 </span>
<span id="L12" class="LineNr">12 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='ex5.mu.html#L12'>main</a></span> <span class="Delimiter">{</span>
<span id="L13" class="LineNr">13 </span> <a href='501draw-text.mu.html#L1'>draw-text-rightward</a> <span class="Constant">0</span>, <span class="Constant">&quot;hello from baremetal Mu!&quot;</span>, <span class="Constant">0x10</span>, <span class="Constant">0x10</span>, <span class="Constant">0xa</span>
<span id="L14" class="LineNr">14 </span><span class="Delimiter">}</span>
<span id="L1" class="LineNr"> 1 </span><span class="muComment"># Draw a single line of ASCII text using the built-in font (GNU unifont)</span>
<span id="L2" class="LineNr"> 2 </span><span class="muComment"># Also demonstrates bounds-checking _before_ drawing.</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_mu_baremetal baremetal/ex5.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 baremetal/boot.bochsrc # boot.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: text in green near the top-left corner of screen</span>
<span id="L12" class="LineNr">12 </span>
<span id="L13" class="LineNr">13 </span><span class="PreProc">fn</span> <span class="muFunction">main</span> <span class="Delimiter">{</span>
<span id="L14" class="LineNr">14 </span> <span class="PreProc">var</span> dummy/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> draw-text-rightward <span class="Constant">0</span>, <span class="Constant">&quot;hello from baremetal Mu!&quot;</span>, <span class="Constant">0x10</span>, <span class="Constant">0x400</span>, <span class="Constant">0x10</span>, <span class="Constant">0xa</span> <span class="muComment"># xmax = end of screen, plenty of space</span>
<span id="L15" class="LineNr">15 </span> dummy <span class="SpecialChar">&lt;-</span> draw-text-rightward <span class="Constant">0</span>, <span class="Constant">&quot;you shouldn't see this&quot;</span>, <span class="Constant">0x10</span>, <span class="Constant">0xa0</span>, <span class="Constant">0x30</span>, <span class="Constant">0x3</span> <span class="muComment"># xmax = 0xa0, which is too narrow</span>
<span id="L16" class="LineNr">16 </span><span class="Delimiter">}</span>
</pre>
</body>
</html>

94
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@ -0,0 +1,94 @@
<!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 - baremetal/ex6.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; }
.LineNr { }
.Constant { color: #008787; }
.SpecialChar { color: #d70000; }
.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;
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* we corrected the raw number to a line ID.
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}
return true;
}
if ('onhashchange' in window) {
window.onhashchange = JumpToLine;
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</script>
</head>
<body onload='JumpToLine();'>
<a href='https://github.com/akkartik/mu/blob/main/baremetal/ex6.mu'>https://github.com/akkartik/mu/blob/main/baremetal/ex6.mu</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="muComment"># Drawing ASCII text incrementally.</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_mu_baremetal baremetal/ex6.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 baremetal/boot.bochsrc # boot.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: a box and text that doesn't overflow it</span>
<span id="L11" class="LineNr">11 </span>
<span id="L12" class="LineNr">12 </span><span class="PreProc">fn</span> <span class="muFunction">main</span> <span class="Delimiter">{</span>
<span id="L13" class="LineNr">13 </span> <span class="muComment"># drawing text within a bounding box</span>
<span id="L14" class="LineNr">14 </span> draw-box <span class="Constant">0</span>, <span class="Constant">0xf</span>, <span class="Constant">0x1f</span>, <span class="Constant">0x79</span>, <span class="Constant">0x51</span>, <span class="Constant">0x4</span>
<span id="L15" class="LineNr">15 </span> <span class="PreProc">var</span> x/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0x20</span>
<span id="L16" class="LineNr">16 </span> <span class="PreProc">var</span> y/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0x20</span>
<span id="L17" class="LineNr">17 </span> x, y <span class="SpecialChar">&lt;-</span> draw-text-wrapping-right-then-down <span class="Constant">0</span>, <span class="Constant">&quot;hello &quot;</span>, <span class="Constant">0x10</span>, <span class="Constant">0x20</span>, <span class="Constant">0x78</span>, <span class="Constant">0x50</span>, x, y, <span class="Constant">0xa</span> <span class="muComment"># (0x10, 0x20) -&gt; (0x78, 0x50)</span>
<span id="L18" class="LineNr">18 </span> x, y <span class="SpecialChar">&lt;-</span> draw-text-wrapping-right-then-down <span class="Constant">0</span>, <span class="Constant">&quot;from &quot;</span>, <span class="Constant">0x10</span>, <span class="Constant">0x20</span>, <span class="Constant">0x78</span>, <span class="Constant">0x50</span>, x, y, <span class="Constant">0xa</span>
<span id="L19" class="LineNr">19 </span> x, y <span class="SpecialChar">&lt;-</span> draw-text-wrapping-right-then-down <span class="Constant">0</span>, <span class="Constant">&quot;baremetal &quot;</span>, <span class="Constant">0x10</span>, <span class="Constant">0x20</span>, <span class="Constant">0x78</span>, <span class="Constant">0x50</span>, x, y, <span class="Constant">0xa</span>
<span id="L20" class="LineNr">20 </span> x, y <span class="SpecialChar">&lt;-</span> draw-text-wrapping-right-then-down <span class="Constant">0</span>, <span class="Constant">&quot;Mu!&quot;</span>, <span class="Constant">0x10</span>, <span class="Constant">0x20</span>, <span class="Constant">0x78</span>, <span class="Constant">0x50</span>, x, y, <span class="Constant">0xa</span>
<span id="L21" class="LineNr">21 </span>
<span id="L22" class="LineNr">22 </span> <span class="muComment"># drawing at the cursor in multiple directions</span>
<span id="L23" class="LineNr">23 </span> x, y <span class="SpecialChar">&lt;-</span> draw-text-wrapping-down-then-right-from-cursor-over-full-screen <span class="Constant">0</span>, <span class="Constant">&quot;abc&quot;</span>, <span class="Constant">0xa</span>
<span id="L24" class="LineNr">24 </span> x, y <span class="SpecialChar">&lt;-</span> draw-text-wrapping-right-then-down-from-cursor-over-full-screen <span class="Constant">0</span>, <span class="Constant">&quot;def&quot;</span>, <span class="Constant">0xa</span>
<span id="L25" class="LineNr">25 </span>
<span id="L26" class="LineNr">26 </span> <span class="muComment"># test drawing near the edge</span>
<span id="L27" class="LineNr">27 </span> x <span class="SpecialChar">&lt;-</span> draw-text-rightward <span class="Constant">0</span>, <span class="Constant">&quot;R&quot;</span>, <span class="Constant">0x3f8</span>, <span class="Constant">0x400</span>, <span class="Constant">0x100</span>, <span class="Constant">0xa</span>
<span id="L28" class="LineNr">28 </span> x, y <span class="SpecialChar">&lt;-</span> draw-text-wrapping-right-then-down-from-cursor-over-full-screen <span class="Constant">0</span>, <span class="Constant">&quot;wrapped from R&quot;</span>, <span class="Constant">0xa</span>
<span id="L29" class="LineNr">29 </span>
<span id="L30" class="LineNr">30 </span> x <span class="SpecialChar">&lt;-</span> draw-text-downward <span class="Constant">0</span>, <span class="Constant">&quot;D&quot;</span>, <span class="Constant">0x100</span>, <span class="Constant">0x2f0</span>, <span class="Constant">0x300</span>, <span class="Constant">0xa</span>
<span id="L31" class="LineNr">31 </span> x, y <span class="SpecialChar">&lt;-</span> draw-text-wrapping-down-then-right-from-cursor-over-full-screen <span class="Constant">0</span>, <span class="Constant">&quot;wrapped from D&quot;</span>, <span class="Constant">0xa</span>
<span id="L32" class="LineNr">32 </span><span class="Delimiter">}</span>
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->