.

Switch html rendering to a white background.

10 files changed, 313 insertions, 254 deletions

diff --git a/html/linux/advent2020/1a.mu.html b/html/linux/advent2020/1a.mu.html
index 51414ef0..2724d4bc 100644
--- a/html/linux/advent2020/1a.mu.html
+++ b/html/linux/advent2020/1a.mu.html
@@ -7,21 +7,27 @@
 <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-dark">
+<meta name="colorscheme" content="minimal-light">
 <style type="text/css">
 <!--
-pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #a8a8a8; }
-body { font-size:12pt; font-family: monospace; color: #000000; background-color: #a8a8a8; }
+pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #eeeeee; }
+body { font-size:12pt; font-family: monospace; color: #000000; background-color: #eeeeee; }
 a { color:inherit; }
 * { font-size:12pt; font-size: 1em; }
-.PreProc { color: #c000c0; }
-.Special { color: #ff6060; }
 .LineNr { }
 .Delimiter { color: #c000c0; }
-.CommentedCode { color: #8a8a8a; }
-.Constant { color: #008787; }
 .muFunction { color: #af5f00; text-decoration: underline; }
+.muRegEdx { color: #878700; }
+.muRegEbx { color: #8787af; }
+.muRegEsi { color: #87d787; }
+.muRegEdi { color: #87ffd7; }
+.Constant { color: #008787; }
+.Special { color: #ff6060; }
+.PreProc { color: #c000c0; }
+.CommentedCode { color: #8a8a8a; }
 .muComment { color: #005faf; }
+.muRegEax { color: #875f00; }
+.muRegEcx { color: #af875f; }
 -->
 </style>
 
@@ -70,30 +76,30 @@ if ('onhashchange' in window) {
 <span id="L11" class="LineNr">11 </span><span class="muComment">#</span>
 <span id="L12" class="LineNr">12 </span><span class="muComment"># You'll need to register to download the 'input' file for yourself.</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='1a.mu.html#L14'>main</a></span><span class="PreProc"> -&gt; </span>_/<span class="Constant">ebx</span>: int <span class="Delimiter">{</span>
+<span id="L14" class="LineNr">14 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='1a.mu.html#L14'>main</a></span><span class="PreProc"> -&gt; </span>_/<span class="muRegEbx">ebx</span>: int <span class="Delimiter">{</span>
 <span id="L15" class="LineNr">15 </span>  <span class="muComment"># data structure</span>
 <span id="L16" class="LineNr">16 </span>  <span class="PreProc">var</span> numbers-storage: (array int <span class="Constant">0x100</span>)  <span class="muComment"># 256 ints</span>
-<span id="L17" class="LineNr">17 </span>  <span class="PreProc">var</span> numbers/<span class="Constant">esi</span>: (addr array int) <span class="Special">&lt;-</span> address numbers-storage
-<span id="L18" class="LineNr">18 </span>  <span class="PreProc">var</span> numbers-index/<span class="Constant">ecx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L17" class="LineNr">17 </span>  <span class="PreProc">var</span> numbers/<span class="muRegEsi">esi</span>: (addr array int) <span class="Special">&lt;-</span> address numbers-storage
+<span id="L18" class="LineNr">18 </span>  <span class="PreProc">var</span> numbers-index/<span class="muRegEcx">ecx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
 <span id="L19" class="LineNr">19 </span>  <span class="muComment"># phase 1: parse each line from stdin and add it to numbers</span>
 <span id="L20" class="LineNr">20 </span>  <span class="Delimiter">{</span>
 <span id="L21" class="LineNr">21 </span>    <span class="PreProc">var</span> line-storage: (stream byte <span class="Constant">0x100</span>)  <span class="muComment"># 256 bytes</span>
-<span id="L22" class="LineNr">22 </span>    <span class="PreProc">var</span> line/<span class="Constant">edx</span>: (addr stream byte) <span class="Special">&lt;-</span> address line-storage
+<span id="L22" class="LineNr">22 </span>    <span class="PreProc">var</span> line/<span class="muRegEdx">edx</span>: (addr stream byte) <span class="Special">&lt;-</span> address line-storage
 <span id="L23" class="LineNr">23 </span>    <span class="Delimiter">{</span>
 <span id="L24" class="LineNr">24 </span><span class="CommentedCode">#?       print-string 0, &quot;== iter\n&quot;</span>
 <span id="L25" class="LineNr">25 </span>      <span class="muComment"># read line from stdin</span>
 <span id="L26" class="LineNr">26 </span>      <a href='../106stream.subx.html#L17'>clear-stream</a> line
 <span id="L27" class="LineNr">27 </span>      <a href='../305keyboard.subx.html#L158'>read-line-from-real-keyboard</a> line
 <span id="L28" class="LineNr">28 </span>      <span class="muComment"># if line is empty (not even a newline), quit</span>
-<span id="L29" class="LineNr">29 </span>      <span class="PreProc">var</span> done?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
+<span id="L29" class="LineNr">29 </span>      <span class="PreProc">var</span> done?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
 <span id="L30" class="LineNr">30 </span>      compare done?, <span class="Constant">0</span>/false
 <span id="L31" class="LineNr">31 </span>      <span class="PreProc">break-if-!=</span>
 <span id="L32" class="LineNr">32 </span><span class="CommentedCode">#?       print-stream-to-real-screen line</span>
 <span id="L33" class="LineNr">33 </span>      <span class="muComment"># convert line to int and append it to numbers</span>
-<span id="L34" class="LineNr">34 </span>      <span class="PreProc">var</span> n/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> <a href='../311decimal-int.subx.html#L48'>parse-decimal-int-from-stream</a> line
+<span id="L34" class="LineNr">34 </span>      <span class="PreProc">var</span> n/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> <a href='../311decimal-int.subx.html#L48'>parse-decimal-int-from-stream</a> line
 <span id="L35" class="LineNr">35 </span><span class="CommentedCode">#?       print-int32-decimal 0, n</span>
 <span id="L36" class="LineNr">36 </span><span class="CommentedCode">#?       print-string 0, &quot;\n&quot;</span>
-<span id="L37" class="LineNr">37 </span>      <span class="PreProc">var</span> dest/<span class="Constant">ebx</span>: (addr int) <span class="Special">&lt;-</span> index numbers, numbers-index
+<span id="L37" class="LineNr">37 </span>      <span class="PreProc">var</span> dest/<span class="muRegEbx">ebx</span>: (addr int) <span class="Special">&lt;-</span> index numbers, numbers-index
 <span id="L38" class="LineNr">38 </span>      copy-to *dest, n
 <span id="L39" class="LineNr">39 </span>      numbers-index <span class="Special">&lt;-</span> increment
 <span id="L40" class="LineNr">40 </span><span class="CommentedCode">#?       print-string 0, &quot;== &quot;</span>
@@ -104,17 +110,17 @@ if ('onhashchange' in window) {
 <span id="L45" class="LineNr">45 </span>  <span class="Delimiter">}</span>
 <span id="L46" class="LineNr">46 </span>  <span class="muComment"># phase 2: for each number in the array, check if 2020-it is in the rest of</span>
 <span id="L47" class="LineNr">47 </span>  <span class="muComment"># the array</span>
-<span id="L48" class="LineNr">48 </span>  <span class="PreProc">var</span> i/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L48" class="LineNr">48 </span>  <span class="PreProc">var</span> i/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
 <span id="L49" class="LineNr">49 </span>  <span class="Delimiter">{</span>
 <span id="L50" class="LineNr">50 </span>    compare i, numbers-index
 <span id="L51" class="LineNr">51 </span>    <span class="PreProc">break-if-&gt;=</span>
-<span id="L52" class="LineNr">52 </span>    <span class="PreProc">var</span> src/<span class="Constant">ebx</span>: (addr int) <span class="Special">&lt;-</span> index numbers, i
+<span id="L52" class="LineNr">52 </span>    <span class="PreProc">var</span> src/<span class="muRegEbx">ebx</span>: (addr int) <span class="Special">&lt;-</span> index numbers, i
 <span id="L53" class="LineNr">53 </span><span class="CommentedCode">#?     print-int32-decimal 0, *src</span>
 <span id="L54" class="LineNr">54 </span><span class="CommentedCode">#?     print-string 0, &quot;\n&quot;</span>
-<span id="L55" class="LineNr">55 </span>    <span class="PreProc">var</span> target/<span class="Constant">ecx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0x7e4</span>  <span class="muComment"># 2020</span>
+<span id="L55" class="LineNr">55 </span>    <span class="PreProc">var</span> target/<span class="muRegEcx">ecx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0x7e4</span>  <span class="muComment"># 2020</span>
 <span id="L56" class="LineNr">56 </span>    target <span class="Special">&lt;-</span> subtract *src
 <span id="L57" class="LineNr">57 </span>    <span class="Delimiter">{</span>
-<span id="L58" class="LineNr">58 </span>      <span class="PreProc">var</span> found?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='1a.mu.html#L77'>find-after</a> numbers, i, target
+<span id="L58" class="LineNr">58 </span>      <span class="PreProc">var</span> found?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='1a.mu.html#L77'>find-after</a> numbers, i, target
 <span id="L59" class="LineNr">59 </span>      compare found?, <span class="Constant">0</span>/false
 <span id="L60" class="LineNr">60 </span>      <span class="PreProc">break-if-=</span>
 <span id="L61" class="LineNr">61 </span>      <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">&quot;found\n&quot;</span>
@@ -133,16 +139,16 @@ if ('onhashchange' in window) {
 <span id="L74" class="LineNr">74 </span>  <span class="PreProc">return</span> <span class="Constant">1</span>/not-found
 <span id="L75" class="LineNr">75 </span><span class="Delimiter">}</span>
 <span id="L76" class="LineNr">76 </span>
-<span id="L77" class="LineNr">77 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='1a.mu.html#L77'>find-after</a></span> _numbers: (addr array int), start: int, _target: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: boolean <span class="Delimiter">{</span>
-<span id="L78" class="LineNr">78 </span>  <span class="PreProc">var</span> numbers/<span class="Constant">esi</span>: (addr array int) <span class="Special">&lt;-</span> copy _numbers
-<span id="L79" class="LineNr">79 </span>  <span class="PreProc">var</span> target/<span class="Constant">edi</span>: int <span class="Special">&lt;-</span> copy _target
-<span id="L80" class="LineNr">80 </span>  <span class="PreProc">var</span> len/<span class="Constant">ecx</span>: int <span class="Special">&lt;-</span> length numbers
-<span id="L81" class="LineNr">81 </span>  <span class="PreProc">var</span> i/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> copy start
+<span id="L77" class="LineNr">77 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='1a.mu.html#L77'>find-after</a></span> _numbers: (addr array int), start: int, _target: int<span class="PreProc"> -&gt; </span>_/<span class="muRegEax">eax</span>: boolean <span class="Delimiter">{</span>
+<span id="L78" class="LineNr">78 </span>  <span class="PreProc">var</span> numbers/<span class="muRegEsi">esi</span>: (addr array int) <span class="Special">&lt;-</span> copy _numbers
+<span id="L79" class="LineNr">79 </span>  <span class="PreProc">var</span> target/<span class="muRegEdi">edi</span>: int <span class="Special">&lt;-</span> copy _target
+<span id="L80" class="LineNr">80 </span>  <span class="PreProc">var</span> len/<span class="muRegEcx">ecx</span>: int <span class="Special">&lt;-</span> length numbers
+<span id="L81" class="LineNr">81 </span>  <span class="PreProc">var</span> i/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> copy start
 <span id="L82" class="LineNr">82 </span>  i <span class="Special">&lt;-</span> increment
 <span id="L83" class="LineNr">83 </span>  <span class="Delimiter">{</span>
 <span id="L84" class="LineNr">84 </span>    compare i, len
 <span id="L85" class="LineNr">85 </span>    <span class="PreProc">break-if-&gt;=</span>
-<span id="L86" class="LineNr">86 </span>    <span class="PreProc">var</span> src/<span class="Constant">edx</span>: (addr int) <span class="Special">&lt;-</span> index numbers, i
+<span id="L86" class="LineNr">86 </span>    <span class="PreProc">var</span> src/<span class="muRegEdx">edx</span>: (addr int) <span class="Special">&lt;-</span> index numbers, i
 <span id="L87" class="LineNr">87 </span>    <span class="muComment"># if *src == target, return true</span>
 <span id="L88" class="LineNr">88 </span>    compare *src, target
 <span id="L89" class="LineNr">89 </span>    <span class="Delimiter">{</span>
diff --git a/html/linux/advent2020/1b.mu.html b/html/linux/advent2020/1b.mu.html
index 599d60ba..f5a39374 100644
--- a/html/linux/advent2020/1b.mu.html
+++ b/html/linux/advent2020/1b.mu.html
@@ -7,21 +7,27 @@
 <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-dark">
+<meta name="colorscheme" content="minimal-light">
 <style type="text/css">
 <!--
-pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #a8a8a8; }
-body { font-size:12pt; font-family: monospace; color: #000000; background-color: #a8a8a8; }
+pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #eeeeee; }
+body { font-size:12pt; font-family: monospace; color: #000000; background-color: #eeeeee; }
 a { color:inherit; }
 * { font-size:12pt; font-size: 1em; }
-.PreProc { color: #c000c0; }
-.Special { color: #ff6060; }
 .LineNr { }
 .Delimiter { color: #c000c0; }
-.CommentedCode { color: #8a8a8a; }
-.Constant { color: #008787; }
 .muFunction { color: #af5f00; text-decoration: underline; }
+.muRegEdx { color: #878700; }
+.muRegEbx { color: #8787af; }
+.muRegEsi { color: #87d787; }
+.muRegEdi { color: #87ffd7; }
+.Constant { color: #008787; }
+.Special { color: #ff6060; }
+.PreProc { color: #c000c0; }
+.CommentedCode { color: #8a8a8a; }
 .muComment { color: #005faf; }
+.muRegEax { color: #875f00; }
+.muRegEcx { color: #af875f; }
 -->
 </style>
 
@@ -70,30 +76,30 @@ if ('onhashchange' in window) {
 <span id="L11" class="LineNr"> 11 </span><span class="muComment">#</span>
 <span id="L12" class="LineNr"> 12 </span><span class="muComment"># You'll need to register to download the 'input' file for yourself.</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='1b.mu.html#L14'>main</a></span><span class="PreProc"> -&gt; </span>_/<span class="Constant">ebx</span>: int <span class="Delimiter">{</span>
+<span id="L14" class="LineNr"> 14 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='1b.mu.html#L14'>main</a></span><span class="PreProc"> -&gt; </span>_/<span class="muRegEbx">ebx</span>: int <span class="Delimiter">{</span>
 <span id="L15" class="LineNr"> 15 </span>  <span class="muComment"># data structure</span>
 <span id="L16" class="LineNr"> 16 </span>  <span class="PreProc">var</span> numbers-storage: (array int <span class="Constant">0x100</span>)  <span class="muComment"># 256 ints</span>
-<span id="L17" class="LineNr"> 17 </span>  <span class="PreProc">var</span> numbers/<span class="Constant">esi</span>: (addr array int) <span class="Special">&lt;-</span> address numbers-storage
-<span id="L18" class="LineNr"> 18 </span>  <span class="PreProc">var</span> numbers-index/<span class="Constant">ecx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L17" class="LineNr"> 17 </span>  <span class="PreProc">var</span> numbers/<span class="muRegEsi">esi</span>: (addr array int) <span class="Special">&lt;-</span> address numbers-storage
+<span id="L18" class="LineNr"> 18 </span>  <span class="PreProc">var</span> numbers-index/<span class="muRegEcx">ecx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
 <span id="L19" class="LineNr"> 19 </span>  <span class="muComment"># phase 1: parse each line from stdin and add it to numbers</span>
 <span id="L20" class="LineNr"> 20 </span>  <span class="Delimiter">{</span>
 <span id="L21" class="LineNr"> 21 </span>    <span class="PreProc">var</span> line-storage: (stream byte <span class="Constant">0x100</span>)  <span class="muComment"># 256 bytes</span>
-<span id="L22" class="LineNr"> 22 </span>    <span class="PreProc">var</span> line/<span class="Constant">edx</span>: (addr stream byte) <span class="Special">&lt;-</span> address line-storage
+<span id="L22" class="LineNr"> 22 </span>    <span class="PreProc">var</span> line/<span class="muRegEdx">edx</span>: (addr stream byte) <span class="Special">&lt;-</span> address line-storage
 <span id="L23" class="LineNr"> 23 </span>    <span class="Delimiter">{</span>
 <span id="L24" class="LineNr"> 24 </span><span class="CommentedCode">#?       print-string 0, &quot;== iter\n&quot;</span>
 <span id="L25" class="LineNr"> 25 </span>      <span class="muComment"># read line from stdin</span>
 <span id="L26" class="LineNr"> 26 </span>      <a href='../106stream.subx.html#L17'>clear-stream</a> line
 <span id="L27" class="LineNr"> 27 </span>      <a href='../305keyboard.subx.html#L158'>read-line-from-real-keyboard</a> line
 <span id="L28" class="LineNr"> 28 </span>      <span class="muComment"># if line is empty (not even a newline), quit</span>
-<span id="L29" class="LineNr"> 29 </span>      <span class="PreProc">var</span> done?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
+<span id="L29" class="LineNr"> 29 </span>      <span class="PreProc">var</span> done?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
 <span id="L30" class="LineNr"> 30 </span>      compare done?, <span class="Constant">0</span>/false
 <span id="L31" class="LineNr"> 31 </span>      <span class="PreProc">break-if-!=</span>
 <span id="L32" class="LineNr"> 32 </span><span class="CommentedCode">#?       print-stream-to-real-screen line</span>
 <span id="L33" class="LineNr"> 33 </span>      <span class="muComment"># convert line to int and append it to numbers</span>
-<span id="L34" class="LineNr"> 34 </span>      <span class="PreProc">var</span> n/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> <a href='../311decimal-int.subx.html#L48'>parse-decimal-int-from-stream</a> line
+<span id="L34" class="LineNr"> 34 </span>      <span class="PreProc">var</span> n/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> <a href='../311decimal-int.subx.html#L48'>parse-decimal-int-from-stream</a> line
 <span id="L35" class="LineNr"> 35 </span><span class="CommentedCode">#?       print-int32-decimal 0, n</span>
 <span id="L36" class="LineNr"> 36 </span><span class="CommentedCode">#?       print-string 0, &quot;\n&quot;</span>
-<span id="L37" class="LineNr"> 37 </span>      <span class="PreProc">var</span> dest/<span class="Constant">ebx</span>: (addr int) <span class="Special">&lt;-</span> index numbers, numbers-index
+<span id="L37" class="LineNr"> 37 </span>      <span class="PreProc">var</span> dest/<span class="muRegEbx">ebx</span>: (addr int) <span class="Special">&lt;-</span> index numbers, numbers-index
 <span id="L38" class="LineNr"> 38 </span>      copy-to *dest, n
 <span id="L39" class="LineNr"> 39 </span>      numbers-index <span class="Special">&lt;-</span> increment
 <span id="L40" class="LineNr"> 40 </span><span class="CommentedCode">#?       print-string 0, &quot;== &quot;</span>
@@ -104,12 +110,12 @@ if ('onhashchange' in window) {
 <span id="L45" class="LineNr"> 45 </span>  <span class="Delimiter">}</span>
 <span id="L46" class="LineNr"> 46 </span>  <span class="muComment"># phase 2: for every pair of distinct numbers, check if the rest of the</span>
 <span id="L47" class="LineNr"> 47 </span>  <span class="muComment"># array has 2020-it</span>
-<span id="L48" class="LineNr"> 48 </span>  <span class="PreProc">var</span> i/<span class="Constant">edi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L48" class="LineNr"> 48 </span>  <span class="PreProc">var</span> i/<span class="muRegEdi">edi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
 <span id="L49" class="LineNr"> 49 </span>  <span class="Delimiter">{</span>
 <span id="L50" class="LineNr"> 50 </span>    compare i, numbers-index
 <span id="L51" class="LineNr"> 51 </span>    <span class="PreProc">break-if-&gt;=</span>
 <span id="L52" class="LineNr"> 52 </span>    <span class="muComment"># for j from i+1 to end</span>
-<span id="L53" class="LineNr"> 53 </span>    <span class="PreProc">var</span> j/<span class="Constant">edx</span>: int <span class="Special">&lt;-</span> copy i
+<span id="L53" class="LineNr"> 53 </span>    <span class="PreProc">var</span> j/<span class="muRegEdx">edx</span>: int <span class="Special">&lt;-</span> copy i
 <span id="L54" class="LineNr"> 54 </span>    j <span class="Special">&lt;-</span> increment
 <span id="L55" class="LineNr"> 55 </span>    <span class="Delimiter">{</span>
 <span id="L56" class="LineNr"> 56 </span>      compare j, numbers-index
@@ -117,13 +123,13 @@ if ('onhashchange' in window) {
 <span id="L58" class="LineNr"> 58 </span>      <span class="Delimiter">{</span>
 <span id="L59" class="LineNr"> 59 </span>        compare i, j
 <span id="L60" class="LineNr"> 60 </span>        <span class="PreProc">break-if-=</span>
-<span id="L61" class="LineNr"> 61 </span>        <span class="PreProc">var</span> target/<span class="Constant">ebx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0x7e4</span>  <span class="muComment"># 2020</span>
-<span id="L62" class="LineNr"> 62 </span>        <span class="PreProc">var</span> src/<span class="Constant">edi</span>: (addr int) <span class="Special">&lt;-</span> index numbers, i
+<span id="L61" class="LineNr"> 61 </span>        <span class="PreProc">var</span> target/<span class="muRegEbx">ebx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0x7e4</span>  <span class="muComment"># 2020</span>
+<span id="L62" class="LineNr"> 62 </span>        <span class="PreProc">var</span> src/<span class="muRegEdi">edi</span>: (addr int) <span class="Special">&lt;-</span> index numbers, i
 <span id="L63" class="LineNr"> 63 </span>        target <span class="Special">&lt;-</span> subtract *src
-<span id="L64" class="LineNr"> 64 </span>        <span class="PreProc">var</span> src2/<span class="Constant">ecx</span>: (addr int) <span class="Special">&lt;-</span> index numbers, j
+<span id="L64" class="LineNr"> 64 </span>        <span class="PreProc">var</span> src2/<span class="muRegEcx">ecx</span>: (addr int) <span class="Special">&lt;-</span> index numbers, j
 <span id="L65" class="LineNr"> 65 </span>        target <span class="Special">&lt;-</span> subtract *src2
 <span id="L66" class="LineNr"> 66 </span>        <span class="Delimiter">{</span>
-<span id="L67" class="LineNr"> 67 </span>          <span class="PreProc">var</span> found?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='1b.mu.html#L93'>find-after</a> numbers, j, target
+<span id="L67" class="LineNr"> 67 </span>          <span class="PreProc">var</span> found?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='1b.mu.html#L93'>find-after</a> numbers, j, target
 <span id="L68" class="LineNr"> 68 </span>          compare found?, <span class="Constant">0</span>/false
 <span id="L69" class="LineNr"> 69 </span>          <span class="PreProc">break-if-=</span>
 <span id="L70" class="LineNr"> 70 </span>          <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">&quot;found\n&quot;</span>
@@ -149,16 +155,16 @@ if ('onhashchange' in window) {
 <span id="L90" class="LineNr"> 90 </span>  <span class="PreProc">return</span> <span class="Constant">1</span>/not-found
 <span id="L91" class="LineNr"> 91 </span><span class="Delimiter">}</span>
 <span id="L92" class="LineNr"> 92 </span>
-<span id="L93" class="LineNr"> 93 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='1b.mu.html#L93'>find-after</a></span> _numbers: (addr array int), start: int, _target: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: boolean <span class="Delimiter">{</span>
-<span id="L94" class="LineNr"> 94 </span>  <span class="PreProc">var</span> numbers/<span class="Constant">esi</span>: (addr array int) <span class="Special">&lt;-</span> copy _numbers
-<span id="L95" class="LineNr"> 95 </span>  <span class="PreProc">var</span> target/<span class="Constant">edi</span>: int <span class="Special">&lt;-</span> copy _target
-<span id="L96" class="LineNr"> 96 </span>  <span class="PreProc">var</span> len/<span class="Constant">ecx</span>: int <span class="Special">&lt;-</span> length numbers
-<span id="L97" class="LineNr"> 97 </span>  <span class="PreProc">var</span> i/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> copy start
+<span id="L93" class="LineNr"> 93 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='1b.mu.html#L93'>find-after</a></span> _numbers: (addr array int), start: int, _target: int<span class="PreProc"> -&gt; </span>_/<span class="muRegEax">eax</span>: boolean <span class="Delimiter">{</span>
+<span id="L94" class="LineNr"> 94 </span>  <span class="PreProc">var</span> numbers/<span class="muRegEsi">esi</span>: (addr array int) <span class="Special">&lt;-</span> copy _numbers
+<span id="L95" class="LineNr"> 95 </span>  <span class="PreProc">var</span> target/<span class="muRegEdi">edi</span>: int <span class="Special">&lt;-</span> copy _target
+<span id="L96" class="LineNr"> 96 </span>  <span class="PreProc">var</span> len/<span class="muRegEcx">ecx</span>: int <span class="Special">&lt;-</span> length numbers
+<span id="L97" class="LineNr"> 97 </span>  <span class="PreProc">var</span> i/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> copy start
 <span id="L98" class="LineNr"> 98 </span>  i <span class="Special">&lt;-</span> increment
 <span id="L99" class="LineNr"> 99 </span>  <span class="Delimiter">{</span>
 <span id="L100" class="LineNr">100 </span>    compare i, len
 <span id="L101" class="LineNr">101 </span>    <span class="PreProc">break-if-&gt;=</span>
-<span id="L102" class="LineNr">102 </span>    <span class="PreProc">var</span> src/<span class="Constant">edx</span>: (addr int) <span class="Special">&lt;-</span> index numbers, i
+<span id="L102" class="LineNr">102 </span>    <span class="PreProc">var</span> src/<span class="muRegEdx">edx</span>: (addr int) <span class="Special">&lt;-</span> index numbers, i
 <span id="L103" class="LineNr">103 </span>    <span class="muComment"># if *src == target, return true</span>
 <span id="L104" class="LineNr">104 </span>    compare *src, target
 <span id="L105" class="LineNr">105 </span>    <span class="Delimiter">{</span>
diff --git a/html/linux/advent2020/2a.mu.html b/html/linux/advent2020/2a.mu.html
index b964b6eb..2c8d07f1 100644
--- a/html/linux/advent2020/2a.mu.html
+++ b/html/linux/advent2020/2a.mu.html
@@ -7,18 +7,24 @@
 <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-dark">
+<meta name="colorscheme" content="minimal-light">
 <style type="text/css">
 <!--
-pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #a8a8a8; }
-body { font-size:12pt; font-family: monospace; color: #000000; background-color: #a8a8a8; }
+pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #eeeeee; }
+body { font-size:12pt; font-family: monospace; color: #000000; background-color: #eeeeee; }
 a { color:inherit; }
 * { font-size:12pt; font-size: 1em; }
 .PreProc { color: #c000c0; }
+.muRegEax { color: #875f00; }
+.muRegEcx { color: #af875f; }
 .Special { color: #ff6060; }
 .LineNr { }
-.Delimiter { color: #c000c0; }
 .Constant { color: #008787; }
+.muRegEdx { color: #878700; }
+.muRegEbx { color: #8787af; }
+.muRegEsi { color: #87d787; }
+.muRegEdi { color: #87ffd7; }
+.Delimiter { color: #c000c0; }
 .muFunction { color: #af5f00; text-decoration: underline; }
 .muComment { color: #005faf; }
 -->
@@ -66,45 +72,45 @@ if ('onhashchange' in window) {
 <span id="L8" class="LineNr"> 8 </span><span class="muComment">#</span>
 <span id="L9" class="LineNr"> 9 </span><span class="muComment"># You'll need to register to download the 'input' file for yourself.</span>
 <span id="L10" class="LineNr">10 </span>
-<span id="L11" class="LineNr">11 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='2a.mu.html#L11'>main</a></span><span class="PreProc"> -&gt; </span>_/<span class="Constant">ebx</span>: int <span class="Delimiter">{</span>
-<span id="L12" class="LineNr">12 </span>  <span class="PreProc">var</span> valid-password-count/<span class="Constant">edi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L11" class="LineNr">11 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='2a.mu.html#L11'>main</a></span><span class="PreProc"> -&gt; </span>_/<span class="muRegEbx">ebx</span>: int <span class="Delimiter">{</span>
+<span id="L12" class="LineNr">12 </span>  <span class="PreProc">var</span> valid-password-count/<span class="muRegEdi">edi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
 <span id="L13" class="LineNr">13 </span>  <span class="PreProc">var</span> line-storage: (stream byte <span class="Constant">0x100</span>)  <span class="muComment"># 256 bytes</span>
-<span id="L14" class="LineNr">14 </span>  <span class="PreProc">var</span> line/<span class="Constant">edx</span>: (addr stream byte) <span class="Special">&lt;-</span> address line-storage
+<span id="L14" class="LineNr">14 </span>  <span class="PreProc">var</span> line/<span class="muRegEdx">edx</span>: (addr stream byte) <span class="Special">&lt;-</span> address line-storage
 <span id="L15" class="LineNr">15 </span>  <span class="PreProc">var</span> slice-storage: slice
-<span id="L16" class="LineNr">16 </span>  <span class="PreProc">var</span> slice/<span class="Constant">ecx</span>: (addr slice) <span class="Special">&lt;-</span> address slice-storage
+<span id="L16" class="LineNr">16 </span>  <span class="PreProc">var</span> slice/<span class="muRegEcx">ecx</span>: (addr slice) <span class="Special">&lt;-</span> address slice-storage
 <span id="L17" class="LineNr">17 </span>  <span class="Delimiter">{</span>
 <span id="L18" class="LineNr">18 </span>    <span class="muComment"># read line from stdin</span>
 <span id="L19" class="LineNr">19 </span>    <a href='../106stream.subx.html#L17'>clear-stream</a> line
 <span id="L20" class="LineNr">20 </span>    <a href='../305keyboard.subx.html#L158'>read-line-from-real-keyboard</a> line
 <span id="L21" class="LineNr">21 </span>    <span class="muComment"># if line is empty (not even a newline), quit</span>
-<span id="L22" class="LineNr">22 </span>    <span class="PreProc">var</span> done?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
+<span id="L22" class="LineNr">22 </span>    <span class="PreProc">var</span> done?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
 <span id="L23" class="LineNr">23 </span>    compare done?, <span class="Constant">0</span>/false
 <span id="L24" class="LineNr">24 </span>    <span class="PreProc">break-if-!=</span>
 <span id="L25" class="LineNr">25 </span>    <a href='../304screen.subx.html#L147'>print-stream-to-real-screen</a> line
 <span id="L26" class="LineNr">26 </span>    <span class="muComment"># slice = next-token(line, '-')</span>
 <span id="L27" class="LineNr">27 </span>    <a href='../124next-token.subx.html#L10'>next-token</a> line, <span class="Constant">0x2d</span>, slice
 <span id="L28" class="LineNr">28 </span>    <span class="muComment"># start = parse-int(slice)</span>
-<span id="L29" class="LineNr">29 </span>    <span class="PreProc">var</span> _start/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> <a href='../311decimal-int.subx.html#L4'>parse-decimal-int-from-slice</a> slice
-<span id="L30" class="LineNr">30 </span>    <span class="PreProc">var</span> start/<span class="Constant">ebx</span>: int <span class="Special">&lt;-</span> copy _start
-<span id="L31" class="LineNr">31 </span>    <span class="PreProc">var</span> dash/<span class="Constant">eax</span>: byte <span class="Special">&lt;-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> line  <span class="muComment"># skip '-'</span>
+<span id="L29" class="LineNr">29 </span>    <span class="PreProc">var</span> _start/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> <a href='../311decimal-int.subx.html#L4'>parse-decimal-int-from-slice</a> slice
+<span id="L30" class="LineNr">30 </span>    <span class="PreProc">var</span> start/<span class="muRegEbx">ebx</span>: int <span class="Special">&lt;-</span> copy _start
+<span id="L31" class="LineNr">31 </span>    <span class="PreProc">var</span> dash/<span class="muRegEax">eax</span>: byte <span class="Special">&lt;-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> line  <span class="muComment"># skip '-'</span>
 <span id="L32" class="LineNr">32 </span>    <span class="muComment"># slice = next-token(line, ' ')</span>
 <span id="L33" class="LineNr">33 </span>    <a href='../124next-token.subx.html#L10'>next-token</a> line, <span class="Constant">0x20</span>, slice
-<span id="L34" class="LineNr">34 </span>    <span class="PreProc">var</span> _end/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> <a href='../311decimal-int.subx.html#L4'>parse-decimal-int-from-slice</a> slice
-<span id="L35" class="LineNr">35 </span>    <span class="PreProc">var</span> end/<span class="Constant">esi</span>: int <span class="Special">&lt;-</span> copy _end
+<span id="L34" class="LineNr">34 </span>    <span class="PreProc">var</span> _end/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> <a href='../311decimal-int.subx.html#L4'>parse-decimal-int-from-slice</a> slice
+<span id="L35" class="LineNr">35 </span>    <span class="PreProc">var</span> end/<span class="muRegEsi">esi</span>: int <span class="Special">&lt;-</span> copy _end
 <span id="L36" class="LineNr">36 </span>    <a href='../405screen.mu.html#L484'>print-int32-decimal</a> <span class="Constant">0</span>, start
 <span id="L37" class="LineNr">37 </span>    <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">&quot; &quot;</span>
 <span id="L38" class="LineNr">38 </span>    <a href='../405screen.mu.html#L484'>print-int32-decimal</a> <span class="Constant">0</span>, end
 <span id="L39" class="LineNr">39 </span>    <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">&quot;\n&quot;</span>
 <span id="L40" class="LineNr">40 </span>    <span class="muComment"># letter = next non-space</span>
 <span id="L41" class="LineNr">41 </span>    <a href='../124next-token.subx.html#L464'>skip-chars-matching-whitespace</a> line
-<span id="L42" class="LineNr">42 </span>    <span class="PreProc">var</span> letter/<span class="Constant">eax</span>: byte <span class="Special">&lt;-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> line
+<span id="L42" class="LineNr">42 </span>    <span class="PreProc">var</span> letter/<span class="muRegEax">eax</span>: byte <span class="Special">&lt;-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> line
 <span id="L43" class="LineNr">43 </span>    <span class="muComment"># skip some stuff</span>
 <span id="L44" class="LineNr">44 </span>    <span class="Delimiter">{</span>
-<span id="L45" class="LineNr">45 </span>      <span class="PreProc">var</span> colon/<span class="Constant">eax</span>: byte <span class="Special">&lt;-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> line  <span class="muComment"># skip ':'</span>
+<span id="L45" class="LineNr">45 </span>      <span class="PreProc">var</span> colon/<span class="muRegEax">eax</span>: byte <span class="Special">&lt;-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> line  <span class="muComment"># skip ':'</span>
 <span id="L46" class="LineNr">46 </span>    <span class="Delimiter">}</span>
 <span id="L47" class="LineNr">47 </span>    <a href='../124next-token.subx.html#L464'>skip-chars-matching-whitespace</a> line
 <span id="L48" class="LineNr">48 </span>    <span class="muComment"># now check the rest of the line</span>
-<span id="L49" class="LineNr">49 </span>    <span class="PreProc">var</span> <a href='2a.mu.html#L63'>valid?</a>/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='2a.mu.html#L63'>valid?</a> start, end, letter, line
+<span id="L49" class="LineNr">49 </span>    <span class="PreProc">var</span> <a href='2a.mu.html#L63'>valid?</a>/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='2a.mu.html#L63'>valid?</a> start, end, letter, line
 <span id="L50" class="LineNr">50 </span>    compare <a href='2a.mu.html#L63'>valid?</a>, <span class="Constant">0</span>/false
 <span id="L51" class="LineNr">51 </span>    <span class="Delimiter">{</span>
 <span id="L52" class="LineNr">52 </span>      <span class="PreProc">break-if-=</span>
@@ -118,16 +124,16 @@ if ('onhashchange' in window) {
 <span id="L60" class="LineNr">60 </span>  <span class="PreProc">return</span> <span class="Constant">0</span>
 <span id="L61" class="LineNr">61 </span><span class="Delimiter">}</span>
 <span id="L62" class="LineNr">62 </span>
-<span id="L63" class="LineNr">63 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='2a.mu.html#L63'>valid?</a></span> start: int, end: int, letter: byte, password: (addr stream byte)<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: boolean <span class="Delimiter">{</span>
-<span id="L64" class="LineNr">64 </span>  <span class="PreProc">var</span> letter-count/<span class="Constant">edi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L63" class="LineNr">63 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='2a.mu.html#L63'>valid?</a></span> start: int, end: int, letter: byte, password: (addr stream byte)<span class="PreProc"> -&gt; </span>_/<span class="muRegEax">eax</span>: boolean <span class="Delimiter">{</span>
+<span id="L64" class="LineNr">64 </span>  <span class="PreProc">var</span> letter-count/<span class="muRegEdi">edi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
 <span id="L65" class="LineNr">65 </span>  <span class="muComment"># for every c in password</span>
 <span id="L66" class="LineNr">66 </span>  <span class="muComment">#   if (c == letter)</span>
 <span id="L67" class="LineNr">67 </span>  <span class="muComment">#     ++letter-count</span>
 <span id="L68" class="LineNr">68 </span>  <span class="Delimiter">{</span>
-<span id="L69" class="LineNr">69 </span>    <span class="PreProc">var</span> done?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> password
+<span id="L69" class="LineNr">69 </span>    <span class="PreProc">var</span> done?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> password
 <span id="L70" class="LineNr">70 </span>    compare done?, <span class="Constant">0</span>/false
 <span id="L71" class="LineNr">71 </span>    <span class="PreProc">break-if-!=</span>
-<span id="L72" class="LineNr">72 </span>    <span class="PreProc">var</span> c/<span class="Constant">eax</span>: byte <span class="Special">&lt;-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> password
+<span id="L72" class="LineNr">72 </span>    <span class="PreProc">var</span> c/<span class="muRegEax">eax</span>: byte <span class="Special">&lt;-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> password
 <span id="L73" class="LineNr">73 </span>    compare c, letter
 <span id="L74" class="LineNr">74 </span>    <span class="Delimiter">{</span>
 <span id="L75" class="LineNr">75 </span>      <span class="PreProc">break-if-!=</span>
diff --git a/html/linux/advent2020/2b.mu.html b/html/linux/advent2020/2b.mu.html
index 2558ca05..88e9e7a6 100644
--- a/html/linux/advent2020/2b.mu.html
+++ b/html/linux/advent2020/2b.mu.html
@@ -7,21 +7,27 @@
 <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-dark">
+<meta name="colorscheme" content="minimal-light">
 <style type="text/css">
 <!--
-pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #a8a8a8; }
-body { font-size:12pt; font-family: monospace; color: #000000; background-color: #a8a8a8; }
+pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #eeeeee; }
+body { font-size:12pt; font-family: monospace; color: #000000; background-color: #eeeeee; }
 a { color:inherit; }
 * { font-size:12pt; font-size: 1em; }
-.PreProc { color: #c000c0; }
-.Special { color: #ff6060; }
 .LineNr { }
 .Delimiter { color: #c000c0; }
 .CommentedCode { color: #8a8a8a; }
+.muRegEdx { color: #878700; }
+.muRegEbx { color: #8787af; }
+.muRegEsi { color: #87d787; }
+.muRegEdi { color: #87ffd7; }
 .Constant { color: #008787; }
+.Special { color: #ff6060; }
+.PreProc { color: #c000c0; }
 .muFunction { color: #af5f00; text-decoration: underline; }
 .muComment { color: #005faf; }
+.muRegEax { color: #875f00; }
+.muRegEcx { color: #af875f; }
 -->
 </style>
 
@@ -67,31 +73,31 @@ if ('onhashchange' in window) {
 <span id="L8" class="LineNr">  8 </span><span class="muComment">#</span>
 <span id="L9" class="LineNr">  9 </span><span class="muComment"># You'll need to register to download the 'input' file for yourself.</span>
 <span id="L10" class="LineNr"> 10 </span>
-<span id="L11" class="LineNr"> 11 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='2b.mu.html#L11'>main</a></span><span class="PreProc"> -&gt; </span>_/<span class="Constant">ebx</span>: int <span class="Delimiter">{</span>
-<span id="L12" class="LineNr"> 12 </span>  <span class="PreProc">var</span> valid-password-count/<span class="Constant">edi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L11" class="LineNr"> 11 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='2b.mu.html#L11'>main</a></span><span class="PreProc"> -&gt; </span>_/<span class="muRegEbx">ebx</span>: int <span class="Delimiter">{</span>
+<span id="L12" class="LineNr"> 12 </span>  <span class="PreProc">var</span> valid-password-count/<span class="muRegEdi">edi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
 <span id="L13" class="LineNr"> 13 </span>  <span class="PreProc">var</span> line-storage: (stream byte <span class="Constant">0x100</span>)  <span class="muComment"># 256 bytes</span>
-<span id="L14" class="LineNr"> 14 </span>  <span class="PreProc">var</span> line/<span class="Constant">edx</span>: (addr stream byte) <span class="Special">&lt;-</span> address line-storage
+<span id="L14" class="LineNr"> 14 </span>  <span class="PreProc">var</span> line/<span class="muRegEdx">edx</span>: (addr stream byte) <span class="Special">&lt;-</span> address line-storage
 <span id="L15" class="LineNr"> 15 </span>  <span class="PreProc">var</span> slice-storage: slice
-<span id="L16" class="LineNr"> 16 </span>  <span class="PreProc">var</span> slice/<span class="Constant">ecx</span>: (addr slice) <span class="Special">&lt;-</span> address slice-storage
+<span id="L16" class="LineNr"> 16 </span>  <span class="PreProc">var</span> slice/<span class="muRegEcx">ecx</span>: (addr slice) <span class="Special">&lt;-</span> address slice-storage
 <span id="L17" class="LineNr"> 17 </span>  <span class="Delimiter">{</span>
 <span id="L18" class="LineNr"> 18 </span>    <span class="muComment"># read line from stdin</span>
 <span id="L19" class="LineNr"> 19 </span>    <a href='../106stream.subx.html#L17'>clear-stream</a> line
 <span id="L20" class="LineNr"> 20 </span>    <a href='../305keyboard.subx.html#L158'>read-line-from-real-keyboard</a> line
 <span id="L21" class="LineNr"> 21 </span>    <span class="muComment"># if line is empty (not even a newline), quit</span>
-<span id="L22" class="LineNr"> 22 </span>    <span class="PreProc">var</span> done?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
+<span id="L22" class="LineNr"> 22 </span>    <span class="PreProc">var</span> done?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
 <span id="L23" class="LineNr"> 23 </span>    compare done?, <span class="Constant">0</span>/false
 <span id="L24" class="LineNr"> 24 </span>    <span class="PreProc">break-if-!=</span>
 <span id="L25" class="LineNr"> 25 </span>    <a href='../304screen.subx.html#L147'>print-stream-to-real-screen</a> line
 <span id="L26" class="LineNr"> 26 </span>    <span class="muComment"># slice = next-token(line, '-')</span>
 <span id="L27" class="LineNr"> 27 </span>    <a href='../124next-token.subx.html#L10'>next-token</a> line, <span class="Constant">0x2d</span>, slice
 <span id="L28" class="LineNr"> 28 </span>    <span class="muComment"># pos1 = parse-int(slice)</span>
-<span id="L29" class="LineNr"> 29 </span>    <span class="PreProc">var</span> _pos1/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> <a href='../311decimal-int.subx.html#L4'>parse-decimal-int-from-slice</a> slice
-<span id="L30" class="LineNr"> 30 </span>    <span class="PreProc">var</span> pos1/<span class="Constant">ebx</span>: int <span class="Special">&lt;-</span> copy _pos1
-<span id="L31" class="LineNr"> 31 </span>    <span class="PreProc">var</span> dash/<span class="Constant">eax</span>: byte <span class="Special">&lt;-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> line  <span class="muComment"># skip '-'</span>
+<span id="L29" class="LineNr"> 29 </span>    <span class="PreProc">var</span> _pos1/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> <a href='../311decimal-int.subx.html#L4'>parse-decimal-int-from-slice</a> slice
+<span id="L30" class="LineNr"> 30 </span>    <span class="PreProc">var</span> pos1/<span class="muRegEbx">ebx</span>: int <span class="Special">&lt;-</span> copy _pos1
+<span id="L31" class="LineNr"> 31 </span>    <span class="PreProc">var</span> dash/<span class="muRegEax">eax</span>: byte <span class="Special">&lt;-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> line  <span class="muComment"># skip '-'</span>
 <span id="L32" class="LineNr"> 32 </span>    <span class="muComment"># slice = next-token(line, ' ')</span>
 <span id="L33" class="LineNr"> 33 </span>    <a href='../124next-token.subx.html#L10'>next-token</a> line, <span class="Constant">0x20</span>, slice
-<span id="L34" class="LineNr"> 34 </span>    <span class="PreProc">var</span> _pos2/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> <a href='../311decimal-int.subx.html#L4'>parse-decimal-int-from-slice</a> slice
-<span id="L35" class="LineNr"> 35 </span>    <span class="PreProc">var</span> pos2/<span class="Constant">esi</span>: int <span class="Special">&lt;-</span> copy _pos2
+<span id="L34" class="LineNr"> 34 </span>    <span class="PreProc">var</span> _pos2/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> <a href='../311decimal-int.subx.html#L4'>parse-decimal-int-from-slice</a> slice
+<span id="L35" class="LineNr"> 35 </span>    <span class="PreProc">var</span> pos2/<span class="muRegEsi">esi</span>: int <span class="Special">&lt;-</span> copy _pos2
 <span id="L36" class="LineNr"> 36 </span>    <a href='../405screen.mu.html#L484'>print-int32-decimal</a> <span class="Constant">0</span>, pos1
 <span id="L37" class="LineNr"> 37 </span>    <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">&quot; &quot;</span>
 <span id="L38" class="LineNr"> 38 </span>    <a href='../405screen.mu.html#L484'>print-int32-decimal</a> <span class="Constant">0</span>, pos2
@@ -104,14 +110,14 @@ if ('onhashchange' in window) {
 <span id="L45" class="LineNr"> 45 </span>    <span class="Delimiter">}</span>
 <span id="L46" class="LineNr"> 46 </span>    <span class="muComment"># letter = next non-space</span>
 <span id="L47" class="LineNr"> 47 </span>    <a href='../124next-token.subx.html#L464'>skip-chars-matching-whitespace</a> line
-<span id="L48" class="LineNr"> 48 </span>    <span class="PreProc">var</span> letter/<span class="Constant">eax</span>: byte <span class="Special">&lt;-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> line
+<span id="L48" class="LineNr"> 48 </span>    <span class="PreProc">var</span> letter/<span class="muRegEax">eax</span>: byte <span class="Special">&lt;-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> line
 <span id="L49" class="LineNr"> 49 </span>    <span class="muComment"># skip some stuff</span>
 <span id="L50" class="LineNr"> 50 </span>    <span class="Delimiter">{</span>
-<span id="L51" class="LineNr"> 51 </span>      <span class="PreProc">var</span> colon/<span class="Constant">eax</span>: byte <span class="Special">&lt;-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> line  <span class="muComment"># skip ':'</span>
+<span id="L51" class="LineNr"> 51 </span>      <span class="PreProc">var</span> colon/<span class="muRegEax">eax</span>: byte <span class="Special">&lt;-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> line  <span class="muComment"># skip ':'</span>
 <span id="L52" class="LineNr"> 52 </span>    <span class="Delimiter">}</span>
 <span id="L53" class="LineNr"> 53 </span>    <a href='../124next-token.subx.html#L464'>skip-chars-matching-whitespace</a> line
 <span id="L54" class="LineNr"> 54 </span>    <span class="muComment"># now check the rest of the line</span>
-<span id="L55" class="LineNr"> 55 </span>    <span class="PreProc">var</span> <a href='2b.mu.html#L72'>valid?</a>/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='2b.mu.html#L72'>valid?</a> pos1, pos2, letter, line
+<span id="L55" class="LineNr"> 55 </span>    <span class="PreProc">var</span> <a href='2b.mu.html#L72'>valid?</a>/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='2b.mu.html#L72'>valid?</a> pos1, pos2, letter, line
 <span id="L56" class="LineNr"> 56 </span>    compare <a href='2b.mu.html#L72'>valid?</a>, <span class="Constant">0</span>/false
 <span id="L57" class="LineNr"> 57 </span>    <span class="Delimiter">{</span>
 <span id="L58" class="LineNr"> 58 </span>      <span class="PreProc">break-if-=</span>
@@ -128,9 +134,9 @@ if ('onhashchange' in window) {
 <span id="L69" class="LineNr"> 69 </span><span class="muComment"># ideally password would be a random-access array</span>
 <span id="L70" class="LineNr"> 70 </span><span class="muComment"># we'll just track an index</span>
 <span id="L71" class="LineNr"> 71 </span><span class="muComment"># one benefit: we can easily start at 1</span>
-<span id="L72" class="LineNr"> 72 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='2b.mu.html#L72'>valid?</a></span> pos1: int, pos2: int, letter: byte, password: (addr stream byte)<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: boolean <span class="Delimiter">{</span>
-<span id="L73" class="LineNr"> 73 </span>  <span class="PreProc">var</span> i/<span class="Constant">esi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">1</span>
-<span id="L74" class="LineNr"> 74 </span>  <span class="PreProc">var</span> letter-count/<span class="Constant">edi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L72" class="LineNr"> 72 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='2b.mu.html#L72'>valid?</a></span> pos1: int, pos2: int, letter: byte, password: (addr stream byte)<span class="PreProc"> -&gt; </span>_/<span class="muRegEax">eax</span>: boolean <span class="Delimiter">{</span>
+<span id="L73" class="LineNr"> 73 </span>  <span class="PreProc">var</span> i/<span class="muRegEsi">esi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">1</span>
+<span id="L74" class="LineNr"> 74 </span>  <span class="PreProc">var</span> letter-count/<span class="muRegEdi">edi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
 <span id="L75" class="LineNr"> 75 </span>  <span class="muComment"># while password stream isn't empty</span>
 <span id="L76" class="LineNr"> 76 </span>  <span class="muComment">#   c = read byte from password</span>
 <span id="L77" class="LineNr"> 77 </span>  <span class="muComment">#   if (c == letter)</span>
@@ -143,10 +149,10 @@ if ('onhashchange' in window) {
 <span id="L84" class="LineNr"> 84 </span><span class="CommentedCode">#?     print-string 0, &quot;  &quot;</span>
 <span id="L85" class="LineNr"> 85 </span><span class="CommentedCode">#?     print-int32-decimal 0, i</span>
 <span id="L86" class="LineNr"> 86 </span><span class="CommentedCode">#?     print-string 0, &quot;\n&quot;</span>
-<span id="L87" class="LineNr"> 87 </span>    <span class="PreProc">var</span> done?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> password
+<span id="L87" class="LineNr"> 87 </span>    <span class="PreProc">var</span> done?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> password
 <span id="L88" class="LineNr"> 88 </span>    compare done?, <span class="Constant">0</span>/false
 <span id="L89" class="LineNr"> 89 </span>    <span class="PreProc">break-if-!=</span>
-<span id="L90" class="LineNr"> 90 </span>    <span class="PreProc">var</span> c/<span class="Constant">eax</span>: byte <span class="Special">&lt;-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> password
+<span id="L90" class="LineNr"> 90 </span>    <span class="PreProc">var</span> c/<span class="muRegEax">eax</span>: byte <span class="Special">&lt;-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> password
 <span id="L91" class="LineNr"> 91 </span><span class="CommentedCode">#?     {</span>
 <span id="L92" class="LineNr"> 92 </span><span class="CommentedCode">#?       var c2/eax: int &lt;- copy c</span>
 <span id="L93" class="LineNr"> 93 </span><span class="CommentedCode">#?       print-int32-decimal 0, c2</span>
diff --git a/html/linux/advent2020/3a.mu.html b/html/linux/advent2020/3a.mu.html
index 34e0a152..531c212e 100644
--- a/html/linux/advent2020/3a.mu.html
+++ b/html/linux/advent2020/3a.mu.html
@@ -7,21 +7,27 @@
 <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-dark">
+<meta name="colorscheme" content="minimal-light">
 <style type="text/css">
 <!--
-pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #a8a8a8; }
-body { font-size:12pt; font-family: monospace; color: #000000; background-color: #a8a8a8; }
+pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #eeeeee; }
+body { font-size:12pt; font-family: monospace; color: #000000; background-color: #eeeeee; }
 a { color:inherit; }
 * { font-size:12pt; font-size: 1em; }
-.PreProc { color: #c000c0; }
-.Special { color: #ff6060; }
 .LineNr { }
 .Delimiter { color: #c000c0; }
 .CommentedCode { color: #8a8a8a; }
+.muRegEdx { color: #878700; }
+.muRegEbx { color: #8787af; }
+.muRegEsi { color: #87d787; }
+.muRegEdi { color: #87ffd7; }
 .Constant { color: #008787; }
+.Special { color: #ff6060; }
+.PreProc { color: #c000c0; }
 .muFunction { color: #af5f00; text-decoration: underline; }
 .muComment { color: #005faf; }
+.muRegEax { color: #875f00; }
+.muRegEcx { color: #af875f; }
 -->
 </style>
 
@@ -67,24 +73,24 @@ if ('onhashchange' in window) {
 <span id="L8" class="LineNr">  8 </span><span class="muComment">#</span>
 <span id="L9" class="LineNr">  9 </span><span class="muComment"># You'll need to register to download the 'input' file for yourself.</span>
 <span id="L10" class="LineNr"> 10 </span>
-<span id="L11" class="LineNr"> 11 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='3a.mu.html#L11'>main</a></span><span class="PreProc"> -&gt; </span>_/<span class="Constant">ebx</span>: int <span class="Delimiter">{</span>
+<span id="L11" class="LineNr"> 11 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='3a.mu.html#L11'>main</a></span><span class="PreProc"> -&gt; </span>_/<span class="muRegEbx">ebx</span>: int <span class="Delimiter">{</span>
 <span id="L12" class="LineNr"> 12 </span>  <span class="muComment"># represent trees in a 2D array of ints</span>
 <span id="L13" class="LineNr"> 13 </span>  <span class="muComment"># wasteful since each tree is just one bit</span>
 <span id="L14" class="LineNr"> 14 </span>  <span class="PreProc">var</span> trees-storage: (array int <span class="Constant">0x2800</span>)  <span class="muComment"># 10k ints</span>
-<span id="L15" class="LineNr"> 15 </span>  <span class="PreProc">var</span> trees/<span class="Constant">esi</span>: (addr array int) <span class="Special">&lt;-</span> address trees-storage
-<span id="L16" class="LineNr"> 16 </span>  <span class="PreProc">var</span> trees-length/<span class="Constant">ecx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L15" class="LineNr"> 15 </span>  <span class="PreProc">var</span> trees/<span class="muRegEsi">esi</span>: (addr array int) <span class="Special">&lt;-</span> address trees-storage
+<span id="L16" class="LineNr"> 16 </span>  <span class="PreProc">var</span> trees-length/<span class="muRegEcx">ecx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
 <span id="L17" class="LineNr"> 17 </span>  <span class="PreProc">var</span> num-rows: int
 <span id="L18" class="LineNr"> 18 </span>  <span class="PreProc">var</span> width: int
 <span id="L19" class="LineNr"> 19 </span>  <span class="muComment"># phase 1: parse each row of trees from stdin</span>
 <span id="L20" class="LineNr"> 20 </span>  <span class="Delimiter">{</span>
 <span id="L21" class="LineNr"> 21 </span>    <span class="PreProc">var</span> line-storage: (stream byte <span class="Constant">0x40</span>)  <span class="muComment"># 64 bytes</span>
-<span id="L22" class="LineNr"> 22 </span>    <span class="PreProc">var</span> line/<span class="Constant">edx</span>: (addr stream byte) <span class="Special">&lt;-</span> address line-storage
+<span id="L22" class="LineNr"> 22 </span>    <span class="PreProc">var</span> line/<span class="muRegEdx">edx</span>: (addr stream byte) <span class="Special">&lt;-</span> address line-storage
 <span id="L23" class="LineNr"> 23 </span>    <span class="Delimiter">{</span>
 <span id="L24" class="LineNr"> 24 </span>      <span class="muComment"># read line from stdin</span>
 <span id="L25" class="LineNr"> 25 </span>      <a href='../106stream.subx.html#L17'>clear-stream</a> line
 <span id="L26" class="LineNr"> 26 </span>      <a href='../305keyboard.subx.html#L158'>read-line-from-real-keyboard</a> line
 <span id="L27" class="LineNr"> 27 </span>      <span class="muComment"># if line is empty (not even a newline), quit</span>
-<span id="L28" class="LineNr"> 28 </span>      <span class="PreProc">var</span> done?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
+<span id="L28" class="LineNr"> 28 </span>      <span class="PreProc">var</span> done?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
 <span id="L29" class="LineNr"> 29 </span>      compare done?, <span class="Constant">0</span>/false
 <span id="L30" class="LineNr"> 30 </span>      <span class="PreProc">break-if-!=</span>
 <span id="L31" class="LineNr"> 31 </span>      <span class="muComment"># wastefully recompute width on every line</span>
@@ -92,15 +98,15 @@ if ('onhashchange' in window) {
 <span id="L33" class="LineNr"> 33 </span>      copy-to width, <span class="Constant">0</span>
 <span id="L34" class="LineNr"> 34 </span>      <span class="muComment"># turn each byte into a tree and append it</span>
 <span id="L35" class="LineNr"> 35 </span>      $main:line-loop: <span class="Delimiter">{</span>
-<span id="L36" class="LineNr"> 36 </span>        <span class="PreProc">var</span> done?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
+<span id="L36" class="LineNr"> 36 </span>        <span class="PreProc">var</span> done?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
 <span id="L37" class="LineNr"> 37 </span>        compare done?, <span class="Constant">0</span>/false
 <span id="L38" class="LineNr"> 38 </span>        <span class="PreProc">break-if-!=</span>
 <span id="L39" class="LineNr"> 39 </span><span class="CommentedCode">#?         print-int32-decimal 0, num-rows</span>
 <span id="L40" class="LineNr"> 40 </span><span class="CommentedCode">#?         print-string 0, &quot; &quot;</span>
 <span id="L41" class="LineNr"> 41 </span><span class="CommentedCode">#?         print-int32-decimal 0, width</span>
 <span id="L42" class="LineNr"> 42 </span><span class="CommentedCode">#?         print-string 0, &quot;\n&quot;</span>
-<span id="L43" class="LineNr"> 43 </span>        <span class="PreProc">var</span> dest/<span class="Constant">ebx</span>: (addr int) <span class="Special">&lt;-</span> index trees, trees-length
-<span id="L44" class="LineNr"> 44 </span>        <span class="PreProc">var</span> c/<span class="Constant">eax</span>: byte <span class="Special">&lt;-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> line
+<span id="L43" class="LineNr"> 43 </span>        <span class="PreProc">var</span> dest/<span class="muRegEbx">ebx</span>: (addr int) <span class="Special">&lt;-</span> index trees, trees-length
+<span id="L44" class="LineNr"> 44 </span>        <span class="PreProc">var</span> c/<span class="muRegEax">eax</span>: byte <span class="Special">&lt;-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> line
 <span id="L45" class="LineNr"> 45 </span>        <span class="muComment"># newline comes only at end of line</span>
 <span id="L46" class="LineNr"> 46 </span>        compare c, <span class="Constant">0xa</span>/newline
 <span id="L47" class="LineNr"> 47 </span>        <span class="PreProc">break-if-=</span>
@@ -128,13 +134,13 @@ if ('onhashchange' in window) {
 <span id="L69" class="LineNr"> 69 </span>  <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">&quot;x&quot;</span>
 <span id="L70" class="LineNr"> 70 </span>  <a href='../405screen.mu.html#L484'>print-int32-decimal</a> <span class="Constant">0</span>, width
 <span id="L71" class="LineNr"> 71 </span>  <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">&quot;\n&quot;</span>
-<span id="L72" class="LineNr"> 72 </span>  <span class="PreProc">var</span> row/<span class="Constant">ecx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
-<span id="L73" class="LineNr"> 73 </span>  <span class="PreProc">var</span> col/<span class="Constant">edx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
-<span id="L74" class="LineNr"> 74 </span>  <span class="PreProc">var</span> num-trees-hit/<span class="Constant">edi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L72" class="LineNr"> 72 </span>  <span class="PreProc">var</span> row/<span class="muRegEcx">ecx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L73" class="LineNr"> 73 </span>  <span class="PreProc">var</span> col/<span class="muRegEdx">edx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L74" class="LineNr"> 74 </span>  <span class="PreProc">var</span> num-trees-hit/<span class="muRegEdi">edi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
 <span id="L75" class="LineNr"> 75 </span>  <span class="Delimiter">{</span>
 <span id="L76" class="LineNr"> 76 </span>    compare row, num-rows
 <span id="L77" class="LineNr"> 77 </span>    <span class="PreProc">break-if-&gt;=</span>
-<span id="L78" class="LineNr"> 78 </span>    <span class="PreProc">var</span> curr/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> <a href='3a.mu.html#L94'>index2d</a> trees, row, col, width
+<span id="L78" class="LineNr"> 78 </span>    <span class="PreProc">var</span> curr/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> <a href='3a.mu.html#L94'>index2d</a> trees, row, col, width
 <span id="L79" class="LineNr"> 79 </span>    compare curr, <span class="Constant">0</span>
 <span id="L80" class="LineNr"> 80 </span>    <span class="Delimiter">{</span>
 <span id="L81" class="LineNr"> 81 </span>      <span class="PreProc">break-if-=</span>
@@ -150,18 +156,18 @@ if ('onhashchange' in window) {
 <span id="L91" class="LineNr"> 91 </span>  <span class="PreProc">return</span> <span class="Constant">0</span>
 <span id="L92" class="LineNr"> 92 </span><span class="Delimiter">}</span>
 <span id="L93" class="LineNr"> 93 </span>
-<span id="L94" class="LineNr"> 94 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='3a.mu.html#L94'>index2d</a></span> _arr: (addr array int), _row: int, _col: int, width: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int <span class="Delimiter">{</span>
+<span id="L94" class="LineNr"> 94 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='3a.mu.html#L94'>index2d</a></span> _arr: (addr array int), _row: int, _col: int, width: int<span class="PreProc"> -&gt; </span>_/<span class="muRegEax">eax</span>: int <span class="Delimiter">{</span>
 <span id="L95" class="LineNr"> 95 </span>  <span class="muComment"># handle repeating columns of trees</span>
-<span id="L96" class="LineNr"> 96 </span>  <span class="PreProc">var</span> dummy/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
-<span id="L97" class="LineNr"> 97 </span>  <span class="PreProc">var</span> col/<span class="Constant">edx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L96" class="LineNr"> 96 </span>  <span class="PreProc">var</span> dummy/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L97" class="LineNr"> 97 </span>  <span class="PreProc">var</span> col/<span class="muRegEdx">edx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
 <span id="L98" class="LineNr"> 98 </span>  dummy, col <span class="Special">&lt;-</span> <a href='../314divide.subx.html#L3'>integer-divide</a> _col, width
 <span id="L99" class="LineNr"> 99 </span>  <span class="muComment"># compute index</span>
-<span id="L100" class="LineNr">100 </span>  <span class="PreProc">var</span> index/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> copy _row
+<span id="L100" class="LineNr">100 </span>  <span class="PreProc">var</span> index/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> copy _row
 <span id="L101" class="LineNr">101 </span>  index <span class="Special">&lt;-</span> multiply width
 <span id="L102" class="LineNr">102 </span>  index <span class="Special">&lt;-</span> add col
 <span id="L103" class="LineNr">103 </span>  <span class="muComment"># look up array</span>
-<span id="L104" class="LineNr">104 </span>  <span class="PreProc">var</span> arr/<span class="Constant">esi</span>: (addr array int) <span class="Special">&lt;-</span> copy _arr
-<span id="L105" class="LineNr">105 </span>  <span class="PreProc">var</span> src/<span class="Constant">eax</span>: (addr int) <span class="Special">&lt;-</span> index arr, index
+<span id="L104" class="LineNr">104 </span>  <span class="PreProc">var</span> arr/<span class="muRegEsi">esi</span>: (addr array int) <span class="Special">&lt;-</span> copy _arr
+<span id="L105" class="LineNr">105 </span>  <span class="PreProc">var</span> src/<span class="muRegEax">eax</span>: (addr int) <span class="Special">&lt;-</span> index arr, index
 <span id="L106" class="LineNr">106 </span>  <span class="PreProc">return</span> *src
 <span id="L107" class="LineNr">107 </span><span class="Delimiter">}</span>
 </pre>
diff --git a/html/linux/advent2020/3b.mu.html b/html/linux/advent2020/3b.mu.html
index 6d34a66b..153d86da 100644
--- a/html/linux/advent2020/3b.mu.html
+++ b/html/linux/advent2020/3b.mu.html
@@ -7,21 +7,27 @@
 <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-dark">
+<meta name="colorscheme" content="minimal-light">
 <style type="text/css">
 <!--
-pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #a8a8a8; }
-body { font-size:12pt; font-family: monospace; color: #000000; background-color: #a8a8a8; }
+pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #eeeeee; }
+body { font-size:12pt; font-family: monospace; color: #000000; background-color: #eeeeee; }
 a { color:inherit; }
 * { font-size:12pt; font-size: 1em; }
-.PreProc { color: #c000c0; }
-.Special { color: #ff6060; }
 .LineNr { }
 .Delimiter { color: #c000c0; }
 .CommentedCode { color: #8a8a8a; }
+.muRegEdx { color: #878700; }
+.muRegEbx { color: #8787af; }
+.muRegEsi { color: #87d787; }
+.muRegEdi { color: #87ffd7; }
 .Constant { color: #008787; }
+.Special { color: #ff6060; }
+.PreProc { color: #c000c0; }
 .muFunction { color: #af5f00; text-decoration: underline; }
 .muComment { color: #005faf; }
+.muRegEax { color: #875f00; }
+.muRegEcx { color: #af875f; }
 -->
 </style>
 
@@ -67,24 +73,24 @@ if ('onhashchange' in window) {
 <span id="L8" class="LineNr">  8 </span><span class="muComment">#</span>
 <span id="L9" class="LineNr">  9 </span><span class="muComment"># You'll need to register to download the 'input' file for yourself.</span>
 <span id="L10" class="LineNr"> 10 </span>
-<span id="L11" class="LineNr"> 11 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='3b.mu.html#L11'>main</a></span><span class="PreProc"> -&gt; </span>_/<span class="Constant">ebx</span>: int <span class="Delimiter">{</span>
+<span id="L11" class="LineNr"> 11 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='3b.mu.html#L11'>main</a></span><span class="PreProc"> -&gt; </span>_/<span class="muRegEbx">ebx</span>: int <span class="Delimiter">{</span>
 <span id="L12" class="LineNr"> 12 </span>  <span class="muComment"># represent trees in a 2D array of ints</span>
 <span id="L13" class="LineNr"> 13 </span>  <span class="muComment"># wasteful since each tree is just one bit</span>
 <span id="L14" class="LineNr"> 14 </span>  <span class="PreProc">var</span> trees-storage: (array int <span class="Constant">0x2800</span>)  <span class="muComment"># 10k ints</span>
-<span id="L15" class="LineNr"> 15 </span>  <span class="PreProc">var</span> trees/<span class="Constant">esi</span>: (addr array int) <span class="Special">&lt;-</span> address trees-storage
-<span id="L16" class="LineNr"> 16 </span>  <span class="PreProc">var</span> trees-length/<span class="Constant">ecx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L15" class="LineNr"> 15 </span>  <span class="PreProc">var</span> trees/<span class="muRegEsi">esi</span>: (addr array int) <span class="Special">&lt;-</span> address trees-storage
+<span id="L16" class="LineNr"> 16 </span>  <span class="PreProc">var</span> trees-length/<span class="muRegEcx">ecx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
 <span id="L17" class="LineNr"> 17 </span>  <span class="PreProc">var</span> num-rows: int
 <span id="L18" class="LineNr"> 18 </span>  <span class="PreProc">var</span> width: int
 <span id="L19" class="LineNr"> 19 </span>  <span class="muComment"># phase 1: parse each row of trees from stdin</span>
 <span id="L20" class="LineNr"> 20 </span>  <span class="Delimiter">{</span>
 <span id="L21" class="LineNr"> 21 </span>    <span class="PreProc">var</span> line-storage: (stream byte <span class="Constant">0x40</span>)  <span class="muComment"># 64 bytes</span>
-<span id="L22" class="LineNr"> 22 </span>    <span class="PreProc">var</span> line/<span class="Constant">edx</span>: (addr stream byte) <span class="Special">&lt;-</span> address line-storage
+<span id="L22" class="LineNr"> 22 </span>    <span class="PreProc">var</span> line/<span class="muRegEdx">edx</span>: (addr stream byte) <span class="Special">&lt;-</span> address line-storage
 <span id="L23" class="LineNr"> 23 </span>    <span class="Delimiter">{</span>
 <span id="L24" class="LineNr"> 24 </span>      <span class="muComment"># read line from stdin</span>
 <span id="L25" class="LineNr"> 25 </span>      <a href='../106stream.subx.html#L17'>clear-stream</a> line
 <span id="L26" class="LineNr"> 26 </span>      <a href='../305keyboard.subx.html#L158'>read-line-from-real-keyboard</a> line
 <span id="L27" class="LineNr"> 27 </span>      <span class="muComment"># if line is empty (not even a newline), quit</span>
-<span id="L28" class="LineNr"> 28 </span>      <span class="PreProc">var</span> done?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
+<span id="L28" class="LineNr"> 28 </span>      <span class="PreProc">var</span> done?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
 <span id="L29" class="LineNr"> 29 </span>      compare done?, <span class="Constant">0</span>/false
 <span id="L30" class="LineNr"> 30 </span>      <span class="PreProc">break-if-!=</span>
 <span id="L31" class="LineNr"> 31 </span>      <span class="muComment"># wastefully recompute width on every line</span>
@@ -92,15 +98,15 @@ if ('onhashchange' in window) {
 <span id="L33" class="LineNr"> 33 </span>      copy-to width, <span class="Constant">0</span>
 <span id="L34" class="LineNr"> 34 </span>      <span class="muComment"># turn each byte into a tree and append it</span>
 <span id="L35" class="LineNr"> 35 </span>      $main:line-loop: <span class="Delimiter">{</span>
-<span id="L36" class="LineNr"> 36 </span>        <span class="PreProc">var</span> done?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
+<span id="L36" class="LineNr"> 36 </span>        <span class="PreProc">var</span> done?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
 <span id="L37" class="LineNr"> 37 </span>        compare done?, <span class="Constant">0</span>/false
 <span id="L38" class="LineNr"> 38 </span>        <span class="PreProc">break-if-!=</span>
 <span id="L39" class="LineNr"> 39 </span><span class="CommentedCode">#?         print-int32-decimal 0, num-rows</span>
 <span id="L40" class="LineNr"> 40 </span><span class="CommentedCode">#?         print-string 0, &quot; &quot;</span>
 <span id="L41" class="LineNr"> 41 </span><span class="CommentedCode">#?         print-int32-decimal 0, width</span>
 <span id="L42" class="LineNr"> 42 </span><span class="CommentedCode">#?         print-string 0, &quot;\n&quot;</span>
-<span id="L43" class="LineNr"> 43 </span>        <span class="PreProc">var</span> dest/<span class="Constant">ebx</span>: (addr int) <span class="Special">&lt;-</span> index trees, trees-length
-<span id="L44" class="LineNr"> 44 </span>        <span class="PreProc">var</span> c/<span class="Constant">eax</span>: byte <span class="Special">&lt;-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> line
+<span id="L43" class="LineNr"> 43 </span>        <span class="PreProc">var</span> dest/<span class="muRegEbx">ebx</span>: (addr int) <span class="Special">&lt;-</span> index trees, trees-length
+<span id="L44" class="LineNr"> 44 </span>        <span class="PreProc">var</span> c/<span class="muRegEax">eax</span>: byte <span class="Special">&lt;-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> line
 <span id="L45" class="LineNr"> 45 </span>        <span class="muComment"># newline comes only at end of line</span>
 <span id="L46" class="LineNr"> 46 </span>        compare c, <span class="Constant">0xa</span>/newline
 <span id="L47" class="LineNr"> 47 </span>        <span class="PreProc">break-if-=</span>
@@ -124,24 +130,24 @@ if ('onhashchange' in window) {
 <span id="L65" class="LineNr"> 65 </span>    <span class="Delimiter">}</span>
 <span id="L66" class="LineNr"> 66 </span>  <span class="Delimiter">}</span>
 <span id="L67" class="LineNr"> 67 </span>  <span class="muComment"># phase 2: compute</span>
-<span id="L68" class="LineNr"> 68 </span>  <span class="PreProc">var</span> product/<span class="Constant">edi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">1</span>
-<span id="L69" class="LineNr"> 69 </span>  <span class="PreProc">var</span> result/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> <a href='3b.mu.html#L94'>num-trees-hit</a> trees, width, num-rows, <span class="Constant">1</span>, <span class="Constant">1</span>
+<span id="L68" class="LineNr"> 68 </span>  <span class="PreProc">var</span> product/<span class="muRegEdi">edi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">1</span>
+<span id="L69" class="LineNr"> 69 </span>  <span class="PreProc">var</span> result/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> <a href='3b.mu.html#L94'>num-trees-hit</a> trees, width, num-rows, <span class="Constant">1</span>, <span class="Constant">1</span>
 <span id="L70" class="LineNr"> 70 </span>  <a href='../405screen.mu.html#L484'>print-int32-decimal</a> <span class="Constant">0</span>, result
 <span id="L71" class="LineNr"> 71 </span>  <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">&quot; x &quot;</span>
 <span id="L72" class="LineNr"> 72 </span>  product <span class="Special">&lt;-</span> multiply result
-<span id="L73" class="LineNr"> 73 </span>  <span class="PreProc">var</span> result/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> <a href='3b.mu.html#L94'>num-trees-hit</a> trees, width, num-rows, <span class="Constant">3</span>, <span class="Constant">1</span>
+<span id="L73" class="LineNr"> 73 </span>  <span class="PreProc">var</span> result/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> <a href='3b.mu.html#L94'>num-trees-hit</a> trees, width, num-rows, <span class="Constant">3</span>, <span class="Constant">1</span>
 <span id="L74" class="LineNr"> 74 </span>  <a href='../405screen.mu.html#L484'>print-int32-decimal</a> <span class="Constant">0</span>, result
 <span id="L75" class="LineNr"> 75 </span>  <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">&quot; x &quot;</span>
 <span id="L76" class="LineNr"> 76 </span>  product <span class="Special">&lt;-</span> multiply result
-<span id="L77" class="LineNr"> 77 </span>  <span class="PreProc">var</span> result/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> <a href='3b.mu.html#L94'>num-trees-hit</a> trees, width, num-rows, <span class="Constant">5</span>, <span class="Constant">1</span>
+<span id="L77" class="LineNr"> 77 </span>  <span class="PreProc">var</span> result/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> <a href='3b.mu.html#L94'>num-trees-hit</a> trees, width, num-rows, <span class="Constant">5</span>, <span class="Constant">1</span>
 <span id="L78" class="LineNr"> 78 </span>  <a href='../405screen.mu.html#L484'>print-int32-decimal</a> <span class="Constant">0</span>, result
 <span id="L79" class="LineNr"> 79 </span>  <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">&quot; x &quot;</span>
 <span id="L80" class="LineNr"> 80 </span>  product <span class="Special">&lt;-</span> multiply result
-<span id="L81" class="LineNr"> 81 </span>  <span class="PreProc">var</span> result/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> <a href='3b.mu.html#L94'>num-trees-hit</a> trees, width, num-rows, <span class="Constant">7</span>, <span class="Constant">1</span>
+<span id="L81" class="LineNr"> 81 </span>  <span class="PreProc">var</span> result/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> <a href='3b.mu.html#L94'>num-trees-hit</a> trees, width, num-rows, <span class="Constant">7</span>, <span class="Constant">1</span>
 <span id="L82" class="LineNr"> 82 </span>  <a href='../405screen.mu.html#L484'>print-int32-decimal</a> <span class="Constant">0</span>, result
 <span id="L83" class="LineNr"> 83 </span>  <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">&quot; x &quot;</span>
 <span id="L84" class="LineNr"> 84 </span>  product <span class="Special">&lt;-</span> multiply result
-<span id="L85" class="LineNr"> 85 </span>  <span class="PreProc">var</span> result/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> <a href='3b.mu.html#L94'>num-trees-hit</a> trees, width, num-rows, <span class="Constant">1</span>, <span class="Constant">2</span>
+<span id="L85" class="LineNr"> 85 </span>  <span class="PreProc">var</span> result/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> <a href='3b.mu.html#L94'>num-trees-hit</a> trees, width, num-rows, <span class="Constant">1</span>, <span class="Constant">2</span>
 <span id="L86" class="LineNr"> 86 </span>  <a href='../405screen.mu.html#L484'>print-int32-decimal</a> <span class="Constant">0</span>, result
 <span id="L87" class="LineNr"> 87 </span>  <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">&quot; = &quot;</span>
 <span id="L88" class="LineNr"> 88 </span>  product <span class="Special">&lt;-</span> multiply result
@@ -150,21 +156,21 @@ if ('onhashchange' in window) {
 <span id="L91" class="LineNr"> 91 </span>  <span class="PreProc">return</span> <span class="Constant">0</span>
 <span id="L92" class="LineNr"> 92 </span><span class="Delimiter">}</span>
 <span id="L93" class="LineNr"> 93 </span>
-<span id="L94" class="LineNr"> 94 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='3b.mu.html#L94'>num-trees-hit</a></span> trees: (addr array int), width: int, num-rows: int, right: int, down: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int <span class="Delimiter">{</span>
+<span id="L94" class="LineNr"> 94 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='3b.mu.html#L94'>num-trees-hit</a></span> trees: (addr array int), width: int, num-rows: int, right: int, down: int<span class="PreProc"> -&gt; </span>_/<span class="muRegEax">eax</span>: int <span class="Delimiter">{</span>
 <span id="L95" class="LineNr"> 95 </span><span class="CommentedCode">#?   print-string 0, &quot;== &quot;</span>
 <span id="L96" class="LineNr"> 96 </span><span class="CommentedCode">#?   print-int32-decimal 0, right</span>
 <span id="L97" class="LineNr"> 97 </span><span class="CommentedCode">#?   print-string 0, &quot; &quot;</span>
 <span id="L98" class="LineNr"> 98 </span><span class="CommentedCode">#?   print-int32-decimal 0, down</span>
 <span id="L99" class="LineNr"> 99 </span><span class="CommentedCode">#?   print-string 0, &quot;\n&quot;</span>
-<span id="L100" class="LineNr">100 </span>  <span class="PreProc">var</span> row/<span class="Constant">ecx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
-<span id="L101" class="LineNr">101 </span>  <span class="PreProc">var</span> col/<span class="Constant">edx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
-<span id="L102" class="LineNr">102 </span>  <span class="PreProc">var</span> <a href='3b.mu.html#L94'>num-trees-hit</a>/<span class="Constant">edi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L100" class="LineNr">100 </span>  <span class="PreProc">var</span> row/<span class="muRegEcx">ecx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L101" class="LineNr">101 </span>  <span class="PreProc">var</span> col/<span class="muRegEdx">edx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L102" class="LineNr">102 </span>  <span class="PreProc">var</span> <a href='3b.mu.html#L94'>num-trees-hit</a>/<span class="muRegEdi">edi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
 <span id="L103" class="LineNr">103 </span>  <span class="Delimiter">{</span>
 <span id="L104" class="LineNr">104 </span>    compare row, num-rows
 <span id="L105" class="LineNr">105 </span>    <span class="PreProc">break-if-&gt;=</span>
 <span id="L106" class="LineNr">106 </span><span class="CommentedCode">#?     print-int32-decimal 0, col</span>
 <span id="L107" class="LineNr">107 </span><span class="CommentedCode">#?     print-string 0, &quot;\n&quot;</span>
-<span id="L108" class="LineNr">108 </span>    <span class="PreProc">var</span> curr/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> <a href='3b.mu.html#L121'>index2d</a> trees, row, col, width
+<span id="L108" class="LineNr">108 </span>    <span class="PreProc">var</span> curr/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> <a href='3b.mu.html#L121'>index2d</a> trees, row, col, width
 <span id="L109" class="LineNr">109 </span>    compare curr, <span class="Constant">0</span>
 <span id="L110" class="LineNr">110 </span>    <span class="Delimiter">{</span>
 <span id="L111" class="LineNr">111 </span>      <span class="PreProc">break-if-=</span>
@@ -177,21 +183,21 @@ if ('onhashchange' in window) {
 <span id="L118" class="LineNr">118 </span>  <span class="PreProc">return</span> <a href='3b.mu.html#L94'>num-trees-hit</a>
 <span id="L119" class="LineNr">119 </span><span class="Delimiter">}</span>
 <span id="L120" class="LineNr">120 </span>
-<span id="L121" class="LineNr">121 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='3b.mu.html#L121'>index2d</a></span> _arr: (addr array int), _row: int, _col: int, width: int<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int <span class="Delimiter">{</span>
+<span id="L121" class="LineNr">121 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='3b.mu.html#L121'>index2d</a></span> _arr: (addr array int), _row: int, _col: int, width: int<span class="PreProc"> -&gt; </span>_/<span class="muRegEax">eax</span>: int <span class="Delimiter">{</span>
 <span id="L122" class="LineNr">122 </span>  <span class="muComment"># handle repeating columns of trees</span>
-<span id="L123" class="LineNr">123 </span>  <span class="PreProc">var</span> dummy/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
-<span id="L124" class="LineNr">124 </span>  <span class="PreProc">var</span> col/<span class="Constant">edx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L123" class="LineNr">123 </span>  <span class="PreProc">var</span> dummy/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L124" class="LineNr">124 </span>  <span class="PreProc">var</span> col/<span class="muRegEdx">edx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
 <span id="L125" class="LineNr">125 </span>  dummy, col <span class="Special">&lt;-</span> <a href='../314divide.subx.html#L3'>integer-divide</a> _col, width
 <span id="L126" class="LineNr">126 </span><span class="CommentedCode">#?   print-string 0, &quot;  &quot;</span>
 <span id="L127" class="LineNr">127 </span><span class="CommentedCode">#?   print-int32-decimal 0, col</span>
 <span id="L128" class="LineNr">128 </span><span class="CommentedCode">#?   print-string 0, &quot;\n&quot;</span>
 <span id="L129" class="LineNr">129 </span>  <span class="muComment"># compute index</span>
-<span id="L130" class="LineNr">130 </span>  <span class="PreProc">var</span> index/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> copy _row
+<span id="L130" class="LineNr">130 </span>  <span class="PreProc">var</span> index/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> copy _row
 <span id="L131" class="LineNr">131 </span>  index <span class="Special">&lt;-</span> multiply width
 <span id="L132" class="LineNr">132 </span>  index <span class="Special">&lt;-</span> add col
 <span id="L133" class="LineNr">133 </span>  <span class="muComment"># look up array</span>
-<span id="L134" class="LineNr">134 </span>  <span class="PreProc">var</span> arr/<span class="Constant">esi</span>: (addr array int) <span class="Special">&lt;-</span> copy _arr
-<span id="L135" class="LineNr">135 </span>  <span class="PreProc">var</span> src/<span class="Constant">eax</span>: (addr int) <span class="Special">&lt;-</span> index arr, index
+<span id="L134" class="LineNr">134 </span>  <span class="PreProc">var</span> arr/<span class="muRegEsi">esi</span>: (addr array int) <span class="Special">&lt;-</span> copy _arr
+<span id="L135" class="LineNr">135 </span>  <span class="PreProc">var</span> src/<span class="muRegEax">eax</span>: (addr int) <span class="Special">&lt;-</span> index arr, index
 <span id="L136" class="LineNr">136 </span>  <span class="PreProc">return</span> *src
 <span id="L137" class="LineNr">137 </span><span class="Delimiter">}</span>
 </pre>
diff --git a/html/linux/advent2020/4a.mu.html b/html/linux/advent2020/4a.mu.html
index e17c8199..113207ac 100644
--- a/html/linux/advent2020/4a.mu.html
+++ b/html/linux/advent2020/4a.mu.html
@@ -7,18 +7,24 @@
 <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-dark">
+<meta name="colorscheme" content="minimal-light">
 <style type="text/css">
 <!--
-pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #a8a8a8; }
-body { font-size:12pt; font-family: monospace; color: #000000; background-color: #a8a8a8; }
+pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #eeeeee; }
+body { font-size:12pt; font-family: monospace; color: #000000; background-color: #eeeeee; }
 a { color:inherit; }
 * { font-size:12pt; font-size: 1em; }
 .PreProc { color: #c000c0; }
+.muRegEax { color: #875f00; }
+.muRegEcx { color: #af875f; }
 .Special { color: #ff6060; }
 .LineNr { }
-.Delimiter { color: #c000c0; }
 .Constant { color: #008787; }
+.muRegEdx { color: #878700; }
+.muRegEbx { color: #8787af; }
+.muRegEsi { color: #87d787; }
+.muRegEdi { color: #87ffd7; }
+.Delimiter { color: #c000c0; }
 .muFunction { color: #af5f00; text-decoration: underline; }
 .muComment { color: #005faf; }
 -->
@@ -66,25 +72,25 @@ if ('onhashchange' in window) {
 <span id="L8" class="LineNr"> 8 </span><span class="muComment">#</span>
 <span id="L9" class="LineNr"> 9 </span><span class="muComment"># You'll need to register to download the 'input' file for yourself.</span>
 <span id="L10" class="LineNr">10 </span>
-<span id="L11" class="LineNr">11 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='4a.mu.html#L11'>main</a></span><span class="PreProc"> -&gt; </span>_/<span class="Constant">ebx</span>: int <span class="Delimiter">{</span>
-<span id="L12" class="LineNr">12 </span>  <span class="PreProc">var</span> curr-passport-field-count/<span class="Constant">esi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
-<span id="L13" class="LineNr">13 </span>  <span class="PreProc">var</span> valid-passport-count/<span class="Constant">edi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L11" class="LineNr">11 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='4a.mu.html#L11'>main</a></span><span class="PreProc"> -&gt; </span>_/<span class="muRegEbx">ebx</span>: int <span class="Delimiter">{</span>
+<span id="L12" class="LineNr">12 </span>  <span class="PreProc">var</span> curr-passport-field-count/<span class="muRegEsi">esi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L13" class="LineNr">13 </span>  <span class="PreProc">var</span> valid-passport-count/<span class="muRegEdi">edi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
 <span id="L14" class="LineNr">14 </span>  <span class="PreProc">var</span> line-storage: (stream byte <span class="Constant">0x100</span>)  <span class="muComment"># 256 bytes</span>
-<span id="L15" class="LineNr">15 </span>  <span class="PreProc">var</span> line/<span class="Constant">ecx</span>: (addr stream byte) <span class="Special">&lt;-</span> address line-storage
+<span id="L15" class="LineNr">15 </span>  <span class="PreProc">var</span> line/<span class="muRegEcx">ecx</span>: (addr stream byte) <span class="Special">&lt;-</span> address line-storage
 <span id="L16" class="LineNr">16 </span>  <span class="PreProc">var</span> slice-storage: slice
-<span id="L17" class="LineNr">17 </span>  <span class="PreProc">var</span> slice/<span class="Constant">edx</span>: (addr slice) <span class="Special">&lt;-</span> address slice-storage
+<span id="L17" class="LineNr">17 </span>  <span class="PreProc">var</span> slice/<span class="muRegEdx">edx</span>: (addr slice) <span class="Special">&lt;-</span> address slice-storage
 <span id="L18" class="LineNr">18 </span>  $main:line-loop: <span class="Delimiter">{</span>
 <span id="L19" class="LineNr">19 </span>    <span class="muComment"># read line from stdin</span>
 <span id="L20" class="LineNr">20 </span>    <a href='../106stream.subx.html#L17'>clear-stream</a> line
 <span id="L21" class="LineNr">21 </span>    <a href='../305keyboard.subx.html#L158'>read-line-from-real-keyboard</a> line
 <span id="L22" class="LineNr">22 </span>    <span class="muComment"># if line is empty (not even a newline), quit</span>
-<span id="L23" class="LineNr">23 </span>    <span class="PreProc">var</span> done?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
+<span id="L23" class="LineNr">23 </span>    <span class="PreProc">var</span> done?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
 <span id="L24" class="LineNr">24 </span>    compare done?, <span class="Constant">0</span>/false
 <span id="L25" class="LineNr">25 </span>    <span class="PreProc">break-if-!=</span>
 <span id="L26" class="LineNr">26 </span>    <a href='../304screen.subx.html#L147'>print-stream-to-real-screen</a> line
 <span id="L27" class="LineNr">27 </span>    <span class="muComment"># if line has just a newline, process passport</span>
 <span id="L28" class="LineNr">28 </span>    <a href='../124next-token.subx.html#L464'>skip-chars-matching-whitespace</a> line
-<span id="L29" class="LineNr">29 </span>    <span class="PreProc">var</span> new-passport?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
+<span id="L29" class="LineNr">29 </span>    <span class="PreProc">var</span> new-passport?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
 <span id="L30" class="LineNr">30 </span>    <span class="Delimiter">{</span>
 <span id="L31" class="LineNr">31 </span>      compare new-passport?, <span class="Constant">0</span>/false
 <span id="L32" class="LineNr">32 </span>      <span class="PreProc">break-if-=</span>
@@ -101,13 +107,13 @@ if ('onhashchange' in window) {
 <span id="L43" class="LineNr">43 </span>    <span class="Delimiter">}</span>
 <span id="L44" class="LineNr">44 </span>    $main:word-loop: <span class="Delimiter">{</span>
 <span id="L45" class="LineNr">45 </span>      <a href='../127next-word.subx.html#L11'>next-word</a> line, slice
-<span id="L46" class="LineNr">46 </span>      <span class="PreProc">var</span> done?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L9'>slice-empty?</a> slice
+<span id="L46" class="LineNr">46 </span>      <span class="PreProc">var</span> done?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L9'>slice-empty?</a> slice
 <span id="L47" class="LineNr">47 </span>      compare done?, <span class="Constant">0</span>/false
 <span id="L48" class="LineNr">48 </span>      <span class="PreProc">break-if-!=</span>
 <span id="L49" class="LineNr">49 </span>      <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">&quot;  &quot;</span>
 <span id="L50" class="LineNr">50 </span>      <a href='../304screen.subx.html#L134'>print-slice-to-real-screen</a> slice
 <span id="L51" class="LineNr">51 </span>      <span class="muComment"># treat cid as optional</span>
-<span id="L52" class="LineNr">52 </span>      <span class="PreProc">var</span> optional?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L487'>slice-starts-with?</a> slice, <span class="Constant">&quot;cid:&quot;</span>
+<span id="L52" class="LineNr">52 </span>      <span class="PreProc">var</span> optional?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L487'>slice-starts-with?</a> slice, <span class="Constant">&quot;cid:&quot;</span>
 <span id="L53" class="LineNr">53 </span>      compare optional?, <span class="Constant">0</span>/false
 <span id="L54" class="LineNr">54 </span>      <span class="Delimiter">{</span>
 <span id="L55" class="LineNr">55 </span>        <span class="PreProc">break-if-!=</span>
diff --git a/html/linux/advent2020/4b.mu.html b/html/linux/advent2020/4b.mu.html
index 6737aec1..0f735191 100644
--- a/html/linux/advent2020/4b.mu.html
+++ b/html/linux/advent2020/4b.mu.html
@@ -7,18 +7,24 @@
 <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-dark">
+<meta name="colorscheme" content="minimal-light">
 <style type="text/css">
 <!--
-pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #a8a8a8; }
-body { font-size:12pt; font-family: monospace; color: #000000; background-color: #a8a8a8; }
+pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #eeeeee; }
+body { font-size:12pt; font-family: monospace; color: #000000; background-color: #eeeeee; }
 a { color:inherit; }
 * { font-size:12pt; font-size: 1em; }
 .PreProc { color: #c000c0; }
+.muRegEax { color: #875f00; }
+.muRegEcx { color: #af875f; }
 .Special { color: #ff6060; }
 .LineNr { }
-.Delimiter { color: #c000c0; }
 .Constant { color: #008787; }
+.muRegEdx { color: #878700; }
+.muRegEbx { color: #8787af; }
+.muRegEsi { color: #87d787; }
+.muRegEdi { color: #87ffd7; }
+.Delimiter { color: #c000c0; }
 .muFunction { color: #af5f00; text-decoration: underline; }
 .muComment { color: #005faf; }
 -->
@@ -66,27 +72,27 @@ if ('onhashchange' in window) {
 <span id="L8" class="LineNr">  8 </span><span class="muComment">#</span>
 <span id="L9" class="LineNr">  9 </span><span class="muComment"># You'll need to register to download the 'input' file for yourself.</span>
 <span id="L10" class="LineNr"> 10 </span>
-<span id="L11" class="LineNr"> 11 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='4b.mu.html#L11'>main</a></span><span class="PreProc"> -&gt; </span>_/<span class="Constant">ebx</span>: int <span class="Delimiter">{</span>
-<span id="L12" class="LineNr"> 12 </span>  <span class="PreProc">var</span> curr-passport-field-count/<span class="Constant">esi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
-<span id="L13" class="LineNr"> 13 </span>  <span class="PreProc">var</span> valid-passport-count/<span class="Constant">edi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L11" class="LineNr"> 11 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='4b.mu.html#L11'>main</a></span><span class="PreProc"> -&gt; </span>_/<span class="muRegEbx">ebx</span>: int <span class="Delimiter">{</span>
+<span id="L12" class="LineNr"> 12 </span>  <span class="PreProc">var</span> curr-passport-field-count/<span class="muRegEsi">esi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L13" class="LineNr"> 13 </span>  <span class="PreProc">var</span> valid-passport-count/<span class="muRegEdi">edi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
 <span id="L14" class="LineNr"> 14 </span>  <span class="PreProc">var</span> line-storage: (stream byte <span class="Constant">0x100</span>)  <span class="muComment"># 256 bytes</span>
-<span id="L15" class="LineNr"> 15 </span>  <span class="PreProc">var</span> line/<span class="Constant">ecx</span>: (addr stream byte) <span class="Special">&lt;-</span> address line-storage
+<span id="L15" class="LineNr"> 15 </span>  <span class="PreProc">var</span> line/<span class="muRegEcx">ecx</span>: (addr stream byte) <span class="Special">&lt;-</span> address line-storage
 <span id="L16" class="LineNr"> 16 </span>  <span class="PreProc">var</span> key-slice-storage: slice
-<span id="L17" class="LineNr"> 17 </span>  <span class="PreProc">var</span> key-slice/<span class="Constant">edx</span>: (addr slice) <span class="Special">&lt;-</span> address key-slice-storage
+<span id="L17" class="LineNr"> 17 </span>  <span class="PreProc">var</span> key-slice/<span class="muRegEdx">edx</span>: (addr slice) <span class="Special">&lt;-</span> address key-slice-storage
 <span id="L18" class="LineNr"> 18 </span>  <span class="PreProc">var</span> val-slice-storage: slice
-<span id="L19" class="LineNr"> 19 </span>  <span class="PreProc">var</span> val-slice/<span class="Constant">ebx</span>: (addr slice) <span class="Special">&lt;-</span> address val-slice-storage
+<span id="L19" class="LineNr"> 19 </span>  <span class="PreProc">var</span> val-slice/<span class="muRegEbx">ebx</span>: (addr slice) <span class="Special">&lt;-</span> address val-slice-storage
 <span id="L20" class="LineNr"> 20 </span>  $main:line-loop: <span class="Delimiter">{</span>
 <span id="L21" class="LineNr"> 21 </span>    <span class="muComment"># read line from stdin</span>
 <span id="L22" class="LineNr"> 22 </span>    <a href='../106stream.subx.html#L17'>clear-stream</a> line
 <span id="L23" class="LineNr"> 23 </span>    <a href='../305keyboard.subx.html#L158'>read-line-from-real-keyboard</a> line
 <span id="L24" class="LineNr"> 24 </span>    <span class="muComment"># if line is empty (not even a newline), quit</span>
-<span id="L25" class="LineNr"> 25 </span>    <span class="PreProc">var</span> done?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
+<span id="L25" class="LineNr"> 25 </span>    <span class="PreProc">var</span> done?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
 <span id="L26" class="LineNr"> 26 </span>    compare done?, <span class="Constant">0</span>/false
 <span id="L27" class="LineNr"> 27 </span>    <span class="PreProc">break-if-!=</span>
 <span id="L28" class="LineNr"> 28 </span>    <a href='../304screen.subx.html#L147'>print-stream-to-real-screen</a> line
 <span id="L29" class="LineNr"> 29 </span>    <span class="muComment"># if line has just a newline, process passport</span>
 <span id="L30" class="LineNr"> 30 </span>    <a href='../124next-token.subx.html#L464'>skip-chars-matching-whitespace</a> line
-<span id="L31" class="LineNr"> 31 </span>    <span class="PreProc">var</span> new-passport?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
+<span id="L31" class="LineNr"> 31 </span>    <span class="PreProc">var</span> new-passport?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
 <span id="L32" class="LineNr"> 32 </span>    <span class="Delimiter">{</span>
 <span id="L33" class="LineNr"> 33 </span>      compare new-passport?, <span class="Constant">0</span>/false
 <span id="L34" class="LineNr"> 34 </span>      <span class="PreProc">break-if-=</span>
@@ -103,18 +109,18 @@ if ('onhashchange' in window) {
 <span id="L45" class="LineNr"> 45 </span>    <span class="Delimiter">}</span>
 <span id="L46" class="LineNr"> 46 </span>    $main:word-loop: <span class="Delimiter">{</span>
 <span id="L47" class="LineNr"> 47 </span>      <a href='../124next-token.subx.html#L464'>skip-chars-matching-whitespace</a> line
-<span id="L48" class="LineNr"> 48 </span>      <span class="PreProc">var</span> done?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
+<span id="L48" class="LineNr"> 48 </span>      <span class="PreProc">var</span> done?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
 <span id="L49" class="LineNr"> 49 </span>      compare done?, <span class="Constant">0</span>/false
 <span id="L50" class="LineNr"> 50 </span>      <span class="PreProc">break-if-!=</span>
 <span id="L51" class="LineNr"> 51 </span>      <a href='../124next-token.subx.html#L10'>next-token</a> line, <span class="Constant">0x3a</span>, key-slice  <span class="muComment"># ':'</span>
-<span id="L52" class="LineNr"> 52 </span>      <span class="PreProc">var</span> dummy/<span class="Constant">eax</span>: byte <span class="Special">&lt;-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> line  <span class="muComment"># skip ':'</span>
+<span id="L52" class="LineNr"> 52 </span>      <span class="PreProc">var</span> dummy/<span class="muRegEax">eax</span>: byte <span class="Special">&lt;-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> line  <span class="muComment"># skip ':'</span>
 <span id="L53" class="LineNr"> 53 </span>      <a href='../127next-word.subx.html#L306'>next-raw-word</a> line, val-slice
 <span id="L54" class="LineNr"> 54 </span>      <a href='../304screen.subx.html#L134'>print-slice-to-real-screen</a> key-slice
 <span id="L55" class="LineNr"> 55 </span>      <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">&quot; : &quot;</span>
 <span id="L56" class="LineNr"> 56 </span>      <a href='../304screen.subx.html#L134'>print-slice-to-real-screen</a> val-slice
 <span id="L57" class="LineNr"> 57 </span>      <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">&quot;\n&quot;</span>
 <span id="L58" class="LineNr"> 58 </span>      <span class="muComment"># treat cid as optional</span>
-<span id="L59" class="LineNr"> 59 </span>      <span class="PreProc">var</span> cid?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> key-slice, <span class="Constant">&quot;cid&quot;</span>
+<span id="L59" class="LineNr"> 59 </span>      <span class="PreProc">var</span> cid?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> key-slice, <span class="Constant">&quot;cid&quot;</span>
 <span id="L60" class="LineNr"> 60 </span>      compare cid?, <span class="Constant">0</span>/false
 <span id="L61" class="LineNr"> 61 </span>      <span class="PreProc">loop-if-!=</span>
 <span id="L62" class="LineNr"> 62 </span>      <span class="muComment"># increment field count</span>
@@ -122,11 +128,11 @@ if ('onhashchange' in window) {
 <span id="L64" class="LineNr"> 64 </span>      <span class="muComment"># - validate fields one by one, setting curr-passport-field-count to impossibly high value to signal invalid</span>
 <span id="L65" class="LineNr"> 65 </span>      <span class="muComment"># byr</span>
 <span id="L66" class="LineNr"> 66 </span>      <span class="Delimiter">{</span>
-<span id="L67" class="LineNr"> 67 </span>        <span class="PreProc">var</span> byr?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> key-slice, <span class="Constant">&quot;byr&quot;</span>
+<span id="L67" class="LineNr"> 67 </span>        <span class="PreProc">var</span> byr?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> key-slice, <span class="Constant">&quot;byr&quot;</span>
 <span id="L68" class="LineNr"> 68 </span>        compare byr?, <span class="Constant">0</span>/false
 <span id="L69" class="LineNr"> 69 </span>        <span class="PreProc">break-if-=</span>
 <span id="L70" class="LineNr"> 70 </span>        <span class="muComment"># 1920 &lt;= byr &lt;= 2002</span>
-<span id="L71" class="LineNr"> 71 </span>        <span class="PreProc">var</span> byr/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> <a href='../311decimal-int.subx.html#L4'>parse-decimal-int-from-slice</a> val-slice
+<span id="L71" class="LineNr"> 71 </span>        <span class="PreProc">var</span> byr/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> <a href='../311decimal-int.subx.html#L4'>parse-decimal-int-from-slice</a> val-slice
 <span id="L72" class="LineNr"> 72 </span>        compare byr, <span class="Constant">0x780</span>  <span class="muComment"># 1920</span>
 <span id="L73" class="LineNr"> 73 </span>        <span class="Delimiter">{</span>
 <span id="L74" class="LineNr"> 74 </span>          <span class="PreProc">break-if-&gt;=</span>
@@ -142,11 +148,11 @@ if ('onhashchange' in window) {
 <span id="L84" class="LineNr"> 84 </span>      <span class="Delimiter">}</span>
 <span id="L85" class="LineNr"> 85 </span>      <span class="muComment"># iyr</span>
 <span id="L86" class="LineNr"> 86 </span>      <span class="Delimiter">{</span>
-<span id="L87" class="LineNr"> 87 </span>        <span class="PreProc">var</span> iyr?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> key-slice, <span class="Constant">&quot;iyr&quot;</span>
+<span id="L87" class="LineNr"> 87 </span>        <span class="PreProc">var</span> iyr?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> key-slice, <span class="Constant">&quot;iyr&quot;</span>
 <span id="L88" class="LineNr"> 88 </span>        compare iyr?, <span class="Constant">0</span>/false
 <span id="L89" class="LineNr"> 89 </span>        <span class="PreProc">break-if-=</span>
 <span id="L90" class="LineNr"> 90 </span>        <span class="muComment"># 2010 &lt;= iyr &lt;= 2020</span>
-<span id="L91" class="LineNr"> 91 </span>        <span class="PreProc">var</span> iyr/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> <a href='../311decimal-int.subx.html#L4'>parse-decimal-int-from-slice</a> val-slice
+<span id="L91" class="LineNr"> 91 </span>        <span class="PreProc">var</span> iyr/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> <a href='../311decimal-int.subx.html#L4'>parse-decimal-int-from-slice</a> val-slice
 <span id="L92" class="LineNr"> 92 </span>        compare iyr, <span class="Constant">0x7da</span>  <span class="muComment"># 2010</span>
 <span id="L93" class="LineNr"> 93 </span>        <span class="Delimiter">{</span>
 <span id="L94" class="LineNr"> 94 </span>          <span class="PreProc">break-if-&gt;=</span>
@@ -162,11 +168,11 @@ if ('onhashchange' in window) {
 <span id="L104" class="LineNr">104 </span>      <span class="Delimiter">}</span>
 <span id="L105" class="LineNr">105 </span>      <span class="muComment"># eyr</span>
 <span id="L106" class="LineNr">106 </span>      <span class="Delimiter">{</span>
-<span id="L107" class="LineNr">107 </span>        <span class="PreProc">var</span> eyr?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> key-slice, <span class="Constant">&quot;eyr&quot;</span>
+<span id="L107" class="LineNr">107 </span>        <span class="PreProc">var</span> eyr?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> key-slice, <span class="Constant">&quot;eyr&quot;</span>
 <span id="L108" class="LineNr">108 </span>        compare eyr?, <span class="Constant">0</span>/false
 <span id="L109" class="LineNr">109 </span>        <span class="PreProc">break-if-=</span>
 <span id="L110" class="LineNr">110 </span>        <span class="muComment"># 2020 &lt;= eyr &lt;= 2030</span>
-<span id="L111" class="LineNr">111 </span>        <span class="PreProc">var</span> eyr/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> <a href='../311decimal-int.subx.html#L4'>parse-decimal-int-from-slice</a> val-slice
+<span id="L111" class="LineNr">111 </span>        <span class="PreProc">var</span> eyr/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> <a href='../311decimal-int.subx.html#L4'>parse-decimal-int-from-slice</a> val-slice
 <span id="L112" class="LineNr">112 </span>        compare eyr, <span class="Constant">0x7e4</span>  <span class="muComment"># 2020</span>
 <span id="L113" class="LineNr">113 </span>        <span class="Delimiter">{</span>
 <span id="L114" class="LineNr">114 </span>          <span class="PreProc">break-if-&gt;=</span>
@@ -182,33 +188,33 @@ if ('onhashchange' in window) {
 <span id="L124" class="LineNr">124 </span>      <span class="Delimiter">}</span>
 <span id="L125" class="LineNr">125 </span>      <span class="muComment"># hgt</span>
 <span id="L126" class="LineNr">126 </span>      <span class="Delimiter">{</span>
-<span id="L127" class="LineNr">127 </span>        <span class="PreProc">var</span> hgt?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> key-slice, <span class="Constant">&quot;hgt&quot;</span>
+<span id="L127" class="LineNr">127 </span>        <span class="PreProc">var</span> hgt?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> key-slice, <span class="Constant">&quot;hgt&quot;</span>
 <span id="L128" class="LineNr">128 </span>        compare hgt?, <span class="Constant">0</span>/false
 <span id="L129" class="LineNr">129 </span>        <span class="PreProc">break-if-=</span>
 <span id="L130" class="LineNr">130 </span>        <span class="muComment"># convert val</span>
 <span id="L131" class="LineNr">131 </span>        <span class="PreProc">var</span> s: (handle array byte)
-<span id="L132" class="LineNr">132 </span>        <span class="PreProc">var</span> s2/<span class="Constant">eax</span>: (addr handle array byte) <span class="Special">&lt;-</span> address s
+<span id="L132" class="LineNr">132 </span>        <span class="PreProc">var</span> s2/<span class="muRegEax">eax</span>: (addr handle array byte) <span class="Special">&lt;-</span> address s
 <span id="L133" class="LineNr">133 </span>        <a href='../315slice.subx.html#L5'>_slice-to-string</a> val-slice, s2
-<span id="L134" class="LineNr">134 </span>        <span class="PreProc">var</span> s3/<span class="Constant">eax</span>: (addr array byte) <span class="Special">&lt;-</span> <a href='../120allocate.subx.html#L258'>lookup</a> *s2
-<span id="L135" class="LineNr">135 </span>        <span class="PreProc">var</span> s4/<span class="Constant">ebx</span>: (addr array byte) <span class="Special">&lt;-</span> copy s3
+<span id="L134" class="LineNr">134 </span>        <span class="PreProc">var</span> s3/<span class="muRegEax">eax</span>: (addr array byte) <span class="Special">&lt;-</span> <a href='../120allocate.subx.html#L258'>lookup</a> *s2
+<span id="L135" class="LineNr">135 </span>        <span class="PreProc">var</span> s4/<span class="muRegEbx">ebx</span>: (addr array byte) <span class="Special">&lt;-</span> copy s3
 <span id="L136" class="LineNr">136 </span>        <span class="muComment"># check suffix</span>
-<span id="L137" class="LineNr">137 </span>        <span class="PreProc">var</span> start/<span class="Constant">edx</span>: int <span class="Special">&lt;-</span> length s4
+<span id="L137" class="LineNr">137 </span>        <span class="PreProc">var</span> start/<span class="muRegEdx">edx</span>: int <span class="Special">&lt;-</span> length s4
 <span id="L138" class="LineNr">138 </span>        start <span class="Special">&lt;-</span> subtract <span class="Constant">2</span>  <span class="muComment"># luckily both 'in' and 'cm' have the same length</span>
 <span id="L139" class="LineNr">139 </span>        <span class="Delimiter">{</span>
 <span id="L140" class="LineNr">140 </span>          <span class="PreProc">var</span> suffix-h: (handle array byte)
-<span id="L141" class="LineNr">141 </span>          <span class="PreProc">var</span> suffix-ah/<span class="Constant">ecx</span>: (addr handle array byte) <span class="Special">&lt;-</span> address suffix-h
+<span id="L141" class="LineNr">141 </span>          <span class="PreProc">var</span> suffix-ah/<span class="muRegEcx">ecx</span>: (addr handle array byte) <span class="Special">&lt;-</span> address suffix-h
 <span id="L142" class="LineNr">142 </span>          <a href='../411string.mu.html#L2'>substring</a> s4, start, <span class="Constant">2</span>, suffix-ah
-<span id="L143" class="LineNr">143 </span>          <span class="PreProc">var</span> suffix/<span class="Constant">eax</span>: (addr array byte) <span class="Special">&lt;-</span> <a href='../120allocate.subx.html#L258'>lookup</a> *suffix-ah
+<span id="L143" class="LineNr">143 </span>          <span class="PreProc">var</span> suffix/<span class="muRegEax">eax</span>: (addr array byte) <span class="Special">&lt;-</span> <a href='../120allocate.subx.html#L258'>lookup</a> *suffix-ah
 <span id="L144" class="LineNr">144 </span>          <span class="Delimiter">{</span>
-<span id="L145" class="LineNr">145 </span>            <span class="PreProc">var</span> match?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../105string-equal.subx.html#L15'>string-equal?</a> suffix, <span class="Constant">&quot;in&quot;</span>
+<span id="L145" class="LineNr">145 </span>            <span class="PreProc">var</span> match?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../105string-equal.subx.html#L15'>string-equal?</a> suffix, <span class="Constant">&quot;in&quot;</span>
 <span id="L146" class="LineNr">146 </span>            compare match?, <span class="Constant">0</span>/false
 <span id="L147" class="LineNr">147 </span>            <span class="PreProc">break-if-=</span>
 <span id="L148" class="LineNr">148 </span>            <span class="muComment"># if suffix is &quot;in&quot;, 59 &lt;= val &lt;= 96</span>
 <span id="L149" class="LineNr">149 </span>            <span class="PreProc">var</span> num-h: (handle array byte)
-<span id="L150" class="LineNr">150 </span>            <span class="PreProc">var</span> num-ah/<span class="Constant">ecx</span>: (addr handle array byte) <span class="Special">&lt;-</span> address num-h
+<span id="L150" class="LineNr">150 </span>            <span class="PreProc">var</span> num-ah/<span class="muRegEcx">ecx</span>: (addr handle array byte) <span class="Special">&lt;-</span> address num-h
 <span id="L151" class="LineNr">151 </span>            <a href='../411string.mu.html#L2'>substring</a> s4, <span class="Constant">0</span>, start, num-ah
-<span id="L152" class="LineNr">152 </span>            <span class="PreProc">var</span> num/<span class="Constant">eax</span>: (addr array byte) <span class="Special">&lt;-</span> <a href='../120allocate.subx.html#L258'>lookup</a> *num-ah
-<span id="L153" class="LineNr">153 </span>            <span class="PreProc">var</span> val/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> <a href='../311decimal-int.subx.html#L23'>parse-decimal-int</a> num
+<span id="L152" class="LineNr">152 </span>            <span class="PreProc">var</span> num/<span class="muRegEax">eax</span>: (addr array byte) <span class="Special">&lt;-</span> <a href='../120allocate.subx.html#L258'>lookup</a> *num-ah
+<span id="L153" class="LineNr">153 </span>            <span class="PreProc">var</span> val/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> <a href='../311decimal-int.subx.html#L23'>parse-decimal-int</a> num
 <span id="L154" class="LineNr">154 </span>            compare val, <span class="Constant">0x3b</span>  <span class="muComment"># 59</span>
 <span id="L155" class="LineNr">155 </span>            <span class="Delimiter">{</span>
 <span id="L156" class="LineNr">156 </span>              <span class="PreProc">break-if-&gt;=</span>
@@ -224,15 +230,15 @@ if ('onhashchange' in window) {
 <span id="L166" class="LineNr">166 </span>            <span class="PreProc">loop</span> $main:word-loop
 <span id="L167" class="LineNr">167 </span>          <span class="Delimiter">}</span>
 <span id="L168" class="LineNr">168 </span>          <span class="Delimiter">{</span>
-<span id="L169" class="LineNr">169 </span>            <span class="PreProc">var</span> match?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../105string-equal.subx.html#L15'>string-equal?</a> suffix, <span class="Constant">&quot;cm&quot;</span>
+<span id="L169" class="LineNr">169 </span>            <span class="PreProc">var</span> match?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../105string-equal.subx.html#L15'>string-equal?</a> suffix, <span class="Constant">&quot;cm&quot;</span>
 <span id="L170" class="LineNr">170 </span>            compare match?, <span class="Constant">0</span>/false
 <span id="L171" class="LineNr">171 </span>            <span class="PreProc">break-if-=</span>
 <span id="L172" class="LineNr">172 </span>            <span class="muComment"># if suffix is &quot;cm&quot;, 150 &lt;= val &lt;= 193</span>
 <span id="L173" class="LineNr">173 </span>            <span class="PreProc">var</span> num-h: (handle array byte)
-<span id="L174" class="LineNr">174 </span>            <span class="PreProc">var</span> num-ah/<span class="Constant">ecx</span>: (addr handle array byte) <span class="Special">&lt;-</span> address num-h
+<span id="L174" class="LineNr">174 </span>            <span class="PreProc">var</span> num-ah/<span class="muRegEcx">ecx</span>: (addr handle array byte) <span class="Special">&lt;-</span> address num-h
 <span id="L175" class="LineNr">175 </span>            <a href='../411string.mu.html#L2'>substring</a> s4, <span class="Constant">0</span>, start, num-ah
-<span id="L176" class="LineNr">176 </span>            <span class="PreProc">var</span> num/<span class="Constant">eax</span>: (addr array byte) <span class="Special">&lt;-</span> <a href='../120allocate.subx.html#L258'>lookup</a> *num-ah
-<span id="L177" class="LineNr">177 </span>            <span class="PreProc">var</span> val/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> <a href='../311decimal-int.subx.html#L23'>parse-decimal-int</a> num
+<span id="L176" class="LineNr">176 </span>            <span class="PreProc">var</span> num/<span class="muRegEax">eax</span>: (addr array byte) <span class="Special">&lt;-</span> <a href='../120allocate.subx.html#L258'>lookup</a> *num-ah
+<span id="L177" class="LineNr">177 </span>            <span class="PreProc">var</span> val/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> <a href='../311decimal-int.subx.html#L23'>parse-decimal-int</a> num
 <span id="L178" class="LineNr">178 </span>            compare val, <span class="Constant">0x96</span>  <span class="muComment"># 150</span>
 <span id="L179" class="LineNr">179 </span>            <span class="Delimiter">{</span>
 <span id="L180" class="LineNr">180 </span>              <span class="PreProc">break-if-&gt;=</span>
@@ -254,16 +260,16 @@ if ('onhashchange' in window) {
 <span id="L196" class="LineNr">196 </span>      <span class="Delimiter">}</span>
 <span id="L197" class="LineNr">197 </span>      <span class="muComment"># hcl</span>
 <span id="L198" class="LineNr">198 </span>      <span class="Delimiter">{</span>
-<span id="L199" class="LineNr">199 </span>        <span class="PreProc">var</span> hcl?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> key-slice, <span class="Constant">&quot;hcl&quot;</span>
+<span id="L199" class="LineNr">199 </span>        <span class="PreProc">var</span> hcl?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> key-slice, <span class="Constant">&quot;hcl&quot;</span>
 <span id="L200" class="LineNr">200 </span>        compare hcl?, <span class="Constant">0</span>/false
 <span id="L201" class="LineNr">201 </span>        <span class="PreProc">break-if-=</span>
 <span id="L202" class="LineNr">202 </span>        <span class="muComment"># convert val</span>
 <span id="L203" class="LineNr">203 </span>        <span class="PreProc">var</span> s: (handle array byte)
-<span id="L204" class="LineNr">204 </span>        <span class="PreProc">var</span> s2/<span class="Constant">eax</span>: (addr handle array byte) <span class="Special">&lt;-</span> address s
+<span id="L204" class="LineNr">204 </span>        <span class="PreProc">var</span> s2/<span class="muRegEax">eax</span>: (addr handle array byte) <span class="Special">&lt;-</span> address s
 <span id="L205" class="LineNr">205 </span>        <a href='../315slice.subx.html#L5'>_slice-to-string</a> val-slice, s2
-<span id="L206" class="LineNr">206 </span>        <span class="PreProc">var</span> s3/<span class="Constant">eax</span>: (addr array byte) <span class="Special">&lt;-</span> <a href='../120allocate.subx.html#L258'>lookup</a> *s2
+<span id="L206" class="LineNr">206 </span>        <span class="PreProc">var</span> s3/<span class="muRegEax">eax</span>: (addr array byte) <span class="Special">&lt;-</span> <a href='../120allocate.subx.html#L258'>lookup</a> *s2
 <span id="L207" class="LineNr">207 </span>        <span class="muComment"># check length</span>
-<span id="L208" class="LineNr">208 </span>        <span class="PreProc">var</span> len/<span class="Constant">ebx</span>: int <span class="Special">&lt;-</span> length s3
+<span id="L208" class="LineNr">208 </span>        <span class="PreProc">var</span> len/<span class="muRegEbx">ebx</span>: int <span class="Special">&lt;-</span> length s3
 <span id="L209" class="LineNr">209 </span>        compare len, <span class="Constant">7</span>
 <span id="L210" class="LineNr">210 </span>        <span class="Delimiter">{</span>
 <span id="L211" class="LineNr">211 </span>          <span class="PreProc">break-if-=</span>
@@ -273,8 +279,8 @@ if ('onhashchange' in window) {
 <span id="L215" class="LineNr">215 </span>        <span class="Delimiter">}</span>
 <span id="L216" class="LineNr">216 </span>        <span class="muComment"># check first byte</span>
 <span id="L217" class="LineNr">217 </span>        <span class="Delimiter">{</span>
-<span id="L218" class="LineNr">218 </span>          <span class="PreProc">var</span> c/<span class="Constant">eax</span>: (addr byte) <span class="Special">&lt;-</span> index s3, <span class="Constant">0</span>
-<span id="L219" class="LineNr">219 </span>          <span class="PreProc">var</span> c2/<span class="Constant">eax</span>: byte <span class="Special">&lt;-</span> copy-byte *c
+<span id="L218" class="LineNr">218 </span>          <span class="PreProc">var</span> c/<span class="muRegEax">eax</span>: (addr byte) <span class="Special">&lt;-</span> index s3, <span class="Constant">0</span>
+<span id="L219" class="LineNr">219 </span>          <span class="PreProc">var</span> c2/<span class="muRegEax">eax</span>: byte <span class="Special">&lt;-</span> copy-byte *c
 <span id="L220" class="LineNr">220 </span>          compare c2, <span class="Constant">0x23</span>/hash
 <span id="L221" class="LineNr">221 </span>          <span class="PreProc">break-if-=</span>
 <span id="L222" class="LineNr">222 </span>          <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">&quot;invalid2\n&quot;</span>
@@ -282,14 +288,14 @@ if ('onhashchange' in window) {
 <span id="L224" class="LineNr">224 </span>          <span class="PreProc">loop</span> $main:word-loop
 <span id="L225" class="LineNr">225 </span>        <span class="Delimiter">}</span>
 <span id="L226" class="LineNr">226 </span>        <span class="muComment"># check remaining bytes</span>
-<span id="L227" class="LineNr">227 </span>        <span class="PreProc">var</span> i/<span class="Constant">ebx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">1</span>  <span class="muComment"># skip 0</span>
+<span id="L227" class="LineNr">227 </span>        <span class="PreProc">var</span> i/<span class="muRegEbx">ebx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">1</span>  <span class="muComment"># skip 0</span>
 <span id="L228" class="LineNr">228 </span>        <span class="Delimiter">{</span>
 <span id="L229" class="LineNr">229 </span>          compare i, <span class="Constant">7</span>
 <span id="L230" class="LineNr">230 </span>          <span class="PreProc">break-if-&gt;=</span>
-<span id="L231" class="LineNr">231 </span>          <span class="PreProc">var</span> c/<span class="Constant">eax</span>: (addr byte) <span class="Special">&lt;-</span> index s3, i
+<span id="L231" class="LineNr">231 </span>          <span class="PreProc">var</span> c/<span class="muRegEax">eax</span>: (addr byte) <span class="Special">&lt;-</span> index s3, i
 <span id="L232" class="LineNr">232 </span>          <span class="Delimiter">{</span>
-<span id="L233" class="LineNr">233 </span>            <span class="PreProc">var</span> c2/<span class="Constant">eax</span>: byte <span class="Special">&lt;-</span> copy-byte *c
-<span id="L234" class="LineNr">234 </span>            <span class="PreProc">var</span> valid?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../118parse-hex-int.subx.html#L701'>hex-digit?</a> c2
+<span id="L233" class="LineNr">233 </span>            <span class="PreProc">var</span> c2/<span class="muRegEax">eax</span>: byte <span class="Special">&lt;-</span> copy-byte *c
+<span id="L234" class="LineNr">234 </span>            <span class="PreProc">var</span> valid?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../118parse-hex-int.subx.html#L701'>hex-digit?</a> c2
 <span id="L235" class="LineNr">235 </span>            compare valid?, <span class="Constant">0</span>
 <span id="L236" class="LineNr">236 </span>            <span class="PreProc">loop-if-=</span> $main:word-loop
 <span id="L237" class="LineNr">237 </span>          <span class="Delimiter">}</span>
@@ -299,28 +305,28 @@ if ('onhashchange' in window) {
 <span id="L241" class="LineNr">241 </span>      <span class="Delimiter">}</span>
 <span id="L242" class="LineNr">242 </span>      <span class="muComment"># ecl</span>
 <span id="L243" class="LineNr">243 </span>      <span class="Delimiter">{</span>
-<span id="L244" class="LineNr">244 </span>        <span class="PreProc">var</span> ecl?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> key-slice, <span class="Constant">&quot;ecl&quot;</span>
+<span id="L244" class="LineNr">244 </span>        <span class="PreProc">var</span> ecl?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> key-slice, <span class="Constant">&quot;ecl&quot;</span>
 <span id="L245" class="LineNr">245 </span>        compare ecl?, <span class="Constant">0</span>/false
 <span id="L246" class="LineNr">246 </span>        <span class="PreProc">break-if-=</span>
-<span id="L247" class="LineNr">247 </span>        <span class="PreProc">var</span> amb?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> val-slice, <span class="Constant">&quot;amb&quot;</span>
+<span id="L247" class="LineNr">247 </span>        <span class="PreProc">var</span> amb?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> val-slice, <span class="Constant">&quot;amb&quot;</span>
 <span id="L248" class="LineNr">248 </span>        compare amb?, <span class="Constant">0</span>/false
 <span id="L249" class="LineNr">249 </span>        <span class="PreProc">loop-if-!=</span> $main:word-loop
-<span id="L250" class="LineNr">250 </span>        <span class="PreProc">var</span> blu?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> val-slice, <span class="Constant">&quot;blu&quot;</span>
+<span id="L250" class="LineNr">250 </span>        <span class="PreProc">var</span> blu?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> val-slice, <span class="Constant">&quot;blu&quot;</span>
 <span id="L251" class="LineNr">251 </span>        compare blu?, <span class="Constant">0</span>/false
 <span id="L252" class="LineNr">252 </span>        <span class="PreProc">loop-if-!=</span> $main:word-loop
-<span id="L253" class="LineNr">253 </span>        <span class="PreProc">var</span> brn?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> val-slice, <span class="Constant">&quot;brn&quot;</span>
+<span id="L253" class="LineNr">253 </span>        <span class="PreProc">var</span> brn?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> val-slice, <span class="Constant">&quot;brn&quot;</span>
 <span id="L254" class="LineNr">254 </span>        compare brn?, <span class="Constant">0</span>/false
 <span id="L255" class="LineNr">255 </span>        <span class="PreProc">loop-if-!=</span> $main:word-loop
-<span id="L256" class="LineNr">256 </span>        <span class="PreProc">var</span> gry?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> val-slice, <span class="Constant">&quot;gry&quot;</span>
+<span id="L256" class="LineNr">256 </span>        <span class="PreProc">var</span> gry?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> val-slice, <span class="Constant">&quot;gry&quot;</span>
 <span id="L257" class="LineNr">257 </span>        compare gry?, <span class="Constant">0</span>/false
 <span id="L258" class="LineNr">258 </span>        <span class="PreProc">loop-if-!=</span> $main:word-loop
-<span id="L259" class="LineNr">259 </span>        <span class="PreProc">var</span> grn?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> val-slice, <span class="Constant">&quot;grn&quot;</span>
+<span id="L259" class="LineNr">259 </span>        <span class="PreProc">var</span> grn?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> val-slice, <span class="Constant">&quot;grn&quot;</span>
 <span id="L260" class="LineNr">260 </span>        compare grn?, <span class="Constant">0</span>/false
 <span id="L261" class="LineNr">261 </span>        <span class="PreProc">loop-if-!=</span> $main:word-loop
-<span id="L262" class="LineNr">262 </span>        <span class="PreProc">var</span> hzl?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> val-slice, <span class="Constant">&quot;hzl&quot;</span>
+<span id="L262" class="LineNr">262 </span>        <span class="PreProc">var</span> hzl?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> val-slice, <span class="Constant">&quot;hzl&quot;</span>
 <span id="L263" class="LineNr">263 </span>        compare hzl?, <span class="Constant">0</span>/false
 <span id="L264" class="LineNr">264 </span>        <span class="PreProc">loop-if-!=</span> $main:word-loop
-<span id="L265" class="LineNr">265 </span>        <span class="PreProc">var</span> oth?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> val-slice, <span class="Constant">&quot;oth&quot;</span>
+<span id="L265" class="LineNr">265 </span>        <span class="PreProc">var</span> oth?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> val-slice, <span class="Constant">&quot;oth&quot;</span>
 <span id="L266" class="LineNr">266 </span>        compare oth?, <span class="Constant">0</span>/false
 <span id="L267" class="LineNr">267 </span>        <span class="PreProc">loop-if-!=</span> $main:word-loop
 <span id="L268" class="LineNr">268 </span>        <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>, <span class="Constant">&quot;invalid\n&quot;</span>
@@ -328,16 +334,16 @@ if ('onhashchange' in window) {
 <span id="L270" class="LineNr">270 </span>      <span class="Delimiter">}</span>
 <span id="L271" class="LineNr">271 </span>      <span class="muComment"># pid</span>
 <span id="L272" class="LineNr">272 </span>      <span class="Delimiter">{</span>
-<span id="L273" class="LineNr">273 </span>        <span class="PreProc">var</span> pid?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> key-slice, <span class="Constant">&quot;pid&quot;</span>
+<span id="L273" class="LineNr">273 </span>        <span class="PreProc">var</span> pid?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../123slice.subx.html#L120'>slice-equal?</a> key-slice, <span class="Constant">&quot;pid&quot;</span>
 <span id="L274" class="LineNr">274 </span>        compare pid?, <span class="Constant">0</span>/false
 <span id="L275" class="LineNr">275 </span>        <span class="PreProc">break-if-=</span>
 <span id="L276" class="LineNr">276 </span>        <span class="muComment"># convert val</span>
 <span id="L277" class="LineNr">277 </span>        <span class="PreProc">var</span> s: (handle array byte)
-<span id="L278" class="LineNr">278 </span>        <span class="PreProc">var</span> s2/<span class="Constant">eax</span>: (addr handle array byte) <span class="Special">&lt;-</span> address s
+<span id="L278" class="LineNr">278 </span>        <span class="PreProc">var</span> s2/<span class="muRegEax">eax</span>: (addr handle array byte) <span class="Special">&lt;-</span> address s
 <span id="L279" class="LineNr">279 </span>        <a href='../315slice.subx.html#L5'>_slice-to-string</a> val-slice, s2
-<span id="L280" class="LineNr">280 </span>        <span class="PreProc">var</span> s3/<span class="Constant">eax</span>: (addr array byte) <span class="Special">&lt;-</span> <a href='../120allocate.subx.html#L258'>lookup</a> *s2
+<span id="L280" class="LineNr">280 </span>        <span class="PreProc">var</span> s3/<span class="muRegEax">eax</span>: (addr array byte) <span class="Special">&lt;-</span> <a href='../120allocate.subx.html#L258'>lookup</a> *s2
 <span id="L281" class="LineNr">281 </span>        <span class="muComment"># check length</span>
-<span id="L282" class="LineNr">282 </span>        <span class="PreProc">var</span> len/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> length s3
+<span id="L282" class="LineNr">282 </span>        <span class="PreProc">var</span> len/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> length s3
 <span id="L283" class="LineNr">283 </span>        compare len, <span class="Constant">9</span>
 <span id="L284" class="LineNr">284 </span>        <span class="Delimiter">{</span>
 <span id="L285" class="LineNr">285 </span>          <span class="PreProc">break-if-=</span>
@@ -348,7 +354,7 @@ if ('onhashchange' in window) {
 <span id="L290" class="LineNr">290 </span>        <span class="muComment"># check valid decimal int</span>
 <span id="L291" class="LineNr">291 </span>        <span class="muComment"># parse-decimal-int-from-slice currently returns 0 on invalid parse,</span>
 <span id="L292" class="LineNr">292 </span>        <span class="muComment"># which isn't ideal but suffices for our purposes</span>
-<span id="L293" class="LineNr">293 </span>        <span class="PreProc">var</span> val/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> <a href='../311decimal-int.subx.html#L4'>parse-decimal-int-from-slice</a> val-slice
+<span id="L293" class="LineNr">293 </span>        <span class="PreProc">var</span> val/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> <a href='../311decimal-int.subx.html#L4'>parse-decimal-int-from-slice</a> val-slice
 <span id="L294" class="LineNr">294 </span>        compare val, <span class="Constant">0</span>
 <span id="L295" class="LineNr">295 </span>        <span class="Delimiter">{</span>
 <span id="L296" class="LineNr">296 </span>          <span class="PreProc">break-if-&gt;</span>
diff --git a/html/linux/advent2020/5a.mu.html b/html/linux/advent2020/5a.mu.html
index ddc8532d..16df9866 100644
--- a/html/linux/advent2020/5a.mu.html
+++ b/html/linux/advent2020/5a.mu.html
@@ -7,20 +7,25 @@
 <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-dark">
+<meta name="colorscheme" content="minimal-light">
 <style type="text/css">
 <!--
-pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #a8a8a8; }
-body { font-size:12pt; font-family: monospace; color: #000000; background-color: #a8a8a8; }
+pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #eeeeee; }
+body { font-size:12pt; font-family: monospace; color: #000000; background-color: #eeeeee; }
 a { color:inherit; }
 * { font-size:12pt; font-size: 1em; }
 .PreProc { color: #c000c0; }
+.muRegEcx { color: #af875f; }
+.muRegEax { color: #875f00; }
 .Special { color: #ff6060; }
 .LineNr { }
-.Delimiter { color: #c000c0; }
-.CommentedCode { color: #8a8a8a; }
 .Constant { color: #008787; }
+.muRegEdx { color: #878700; }
+.muRegEbx { color: #8787af; }
+.muRegEdi { color: #87ffd7; }
+.Delimiter { color: #c000c0; }
 .muFunction { color: #af5f00; text-decoration: underline; }
+.CommentedCode { color: #8a8a8a; }
 .muComment { color: #005faf; }
 -->
 </style>
@@ -67,21 +72,21 @@ if ('onhashchange' in window) {
 <span id="L8" class="LineNr"> 8 </span><span class="muComment">#</span>
 <span id="L9" class="LineNr"> 9 </span><span class="muComment"># You'll need to register to download the 'input' file for yourself.</span>
 <span id="L10" class="LineNr">10 </span>
-<span id="L11" class="LineNr">11 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='5a.mu.html#L11'>main</a></span><span class="PreProc"> -&gt; </span>_/<span class="Constant">ebx</span>: int <span class="Delimiter">{</span>
+<span id="L11" class="LineNr">11 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='5a.mu.html#L11'>main</a></span><span class="PreProc"> -&gt; </span>_/<span class="muRegEbx">ebx</span>: int <span class="Delimiter">{</span>
 <span id="L12" class="LineNr">12 </span>  <span class="PreProc">var</span> line-storage: (stream byte <span class="Constant">0x10</span>)  <span class="muComment"># 16 bytes is enough</span>
-<span id="L13" class="LineNr">13 </span>  <span class="PreProc">var</span> line/<span class="Constant">edx</span>: (addr stream byte) <span class="Special">&lt;-</span> address line-storage
-<span id="L14" class="LineNr">14 </span>  <span class="PreProc">var</span> max-seat-id/<span class="Constant">edi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L13" class="LineNr">13 </span>  <span class="PreProc">var</span> line/<span class="muRegEdx">edx</span>: (addr stream byte) <span class="Special">&lt;-</span> address line-storage
+<span id="L14" class="LineNr">14 </span>  <span class="PreProc">var</span> max-seat-id/<span class="muRegEdi">edi</span>: int <span class="Special">&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>    <span class="muComment"># read line from stdin</span>
 <span id="L17" class="LineNr">17 </span>    <a href='../106stream.subx.html#L17'>clear-stream</a> line
 <span id="L18" class="LineNr">18 </span>    <a href='../305keyboard.subx.html#L158'>read-line-from-real-keyboard</a> line
 <span id="L19" class="LineNr">19 </span>    <a href='../304screen.subx.html#L147'>print-stream-to-real-screen</a> line
 <span id="L20" class="LineNr">20 </span>    <span class="muComment"># if line is empty (not even a newline), quit</span>
-<span id="L21" class="LineNr">21 </span>    <span class="PreProc">var</span> done?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
+<span id="L21" class="LineNr">21 </span>    <span class="PreProc">var</span> done?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
 <span id="L22" class="LineNr">22 </span>    compare done?, <span class="Constant">0</span>/false
 <span id="L23" class="LineNr">23 </span>    <span class="PreProc">break-if-!=</span>
 <span id="L24" class="LineNr">24 </span>    <span class="muComment"># process line</span>
-<span id="L25" class="LineNr">25 </span>    <span class="PreProc">var</span> seat-id/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> <a href='5a.mu.html#L38'>convert-from-binary</a> line
+<span id="L25" class="LineNr">25 </span>    <span class="PreProc">var</span> seat-id/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> <a href='5a.mu.html#L38'>convert-from-binary</a> line
 <span id="L26" class="LineNr">26 </span>    compare seat-id, max-seat-id
 <span id="L27" class="LineNr">27 </span>    <span class="Delimiter">{</span>
 <span id="L28" class="LineNr">28 </span>      <span class="PreProc">break-if-&lt;=</span>
@@ -94,20 +99,20 @@ if ('onhashchange' in window) {
 <span id="L35" class="LineNr">35 </span>  <span class="PreProc">return</span> <span class="Constant">0</span>
 <span id="L36" class="LineNr">36 </span><span class="Delimiter">}</span>
 <span id="L37" class="LineNr">37 </span>
-<span id="L38" class="LineNr">38 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='5a.mu.html#L38'>convert-from-binary</a></span> in: (addr stream byte)<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int <span class="Delimiter">{</span>
-<span id="L39" class="LineNr">39 </span>  <span class="PreProc">var</span> result/<span class="Constant">edi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
-<span id="L40" class="LineNr">40 </span>  <span class="PreProc">var</span> i/<span class="Constant">ecx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">9</span>  <span class="muComment"># loop counter and also exponent</span>
+<span id="L38" class="LineNr">38 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='5a.mu.html#L38'>convert-from-binary</a></span> in: (addr stream byte)<span class="PreProc"> -&gt; </span>_/<span class="muRegEax">eax</span>: int <span class="Delimiter">{</span>
+<span id="L39" class="LineNr">39 </span>  <span class="PreProc">var</span> result/<span class="muRegEdi">edi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L40" class="LineNr">40 </span>  <span class="PreProc">var</span> i/<span class="muRegEcx">ecx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">9</span>  <span class="muComment"># loop counter and also exponent</span>
 <span id="L41" class="LineNr">41 </span>  <span class="Delimiter">{</span>
 <span id="L42" class="LineNr">42 </span>    compare i, <span class="Constant">0</span>
 <span id="L43" class="LineNr">43 </span>    <span class="PreProc">break-if-&lt;</span>
-<span id="L44" class="LineNr">44 </span>    <span class="PreProc">var</span> c/<span class="Constant">eax</span>: byte <span class="Special">&lt;-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> in
+<span id="L44" class="LineNr">44 </span>    <span class="PreProc">var</span> c/<span class="muRegEax">eax</span>: byte <span class="Special">&lt;-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> in
 <span id="L45" class="LineNr">45 </span><span class="CommentedCode">#?     print-string 0, &quot;char: &quot;</span>
 <span id="L46" class="LineNr">46 </span><span class="CommentedCode">#?     {</span>
 <span id="L47" class="LineNr">47 </span><span class="CommentedCode">#?       var c2/eax: int &lt;- copy c</span>
 <span id="L48" class="LineNr">48 </span><span class="CommentedCode">#?       print-int32-hex 0, c2</span>
 <span id="L49" class="LineNr">49 </span><span class="CommentedCode">#?     }</span>
 <span id="L50" class="LineNr">50 </span><span class="CommentedCode">#?     print-string 0, &quot;\n&quot;</span>
-<span id="L51" class="LineNr">51 </span>    <span class="PreProc">var</span> bit/<span class="Constant">edx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L51" class="LineNr">51 </span>    <span class="PreProc">var</span> bit/<span class="muRegEdx">edx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
 <span id="L52" class="LineNr">52 </span>    <span class="Delimiter">{</span>
 <span id="L53" class="LineNr">53 </span>      compare c, <span class="Constant">0x42</span>/B
 <span id="L54" class="LineNr">54 </span>      <span class="PreProc">break-if-!=</span>
@@ -121,7 +126,7 @@ if ('onhashchange' in window) {
 <span id="L62" class="LineNr">62 </span><span class="CommentedCode">#?     print-string 0, &quot;bit: &quot;</span>
 <span id="L63" class="LineNr">63 </span><span class="CommentedCode">#?     print-int32-decimal 0, bit</span>
 <span id="L64" class="LineNr">64 </span><span class="CommentedCode">#?     print-string 0, &quot;\n&quot;</span>
-<span id="L65" class="LineNr">65 </span>    <span class="PreProc">var</span> bit-value/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> <a href='../406int32.mu.html#L5'>repeated-shift-left</a> bit, i
+<span id="L65" class="LineNr">65 </span>    <span class="PreProc">var</span> bit-value/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> <a href='../406int32.mu.html#L5'>repeated-shift-left</a> bit, i
 <span id="L66" class="LineNr">66 </span><span class="CommentedCode">#?     print-string 0, &quot;bit value: &quot;</span>
 <span id="L67" class="LineNr">67 </span><span class="CommentedCode">#?     print-int32-decimal 0, bit-value</span>
 <span id="L68" class="LineNr">68 </span><span class="CommentedCode">#?     print-string 0, &quot;\n&quot;</span>
diff --git a/html/linux/advent2020/5b.mu.html b/html/linux/advent2020/5b.mu.html
index 04f53ae0..80f542e4 100644
--- a/html/linux/advent2020/5b.mu.html
+++ b/html/linux/advent2020/5b.mu.html
@@ -7,18 +7,24 @@
 <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-dark">
+<meta name="colorscheme" content="minimal-light">
 <style type="text/css">
 <!--
-pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #a8a8a8; }
-body { font-size:12pt; font-family: monospace; color: #000000; background-color: #a8a8a8; }
+pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #eeeeee; }
+body { font-size:12pt; font-family: monospace; color: #000000; background-color: #eeeeee; }
 a { color:inherit; }
 * { font-size:12pt; font-size: 1em; }
 .PreProc { color: #c000c0; }
+.muRegEdi { color: #87ffd7; }
+.muRegEcx { color: #af875f; }
 .Special { color: #ff6060; }
 .LineNr { }
-.Delimiter { color: #c000c0; }
 .Constant { color: #008787; }
+.muRegEdx { color: #878700; }
+.muRegEbx { color: #8787af; }
+.muRegEsi { color: #87d787; }
+.muRegEax { color: #875f00; }
+.Delimiter { color: #c000c0; }
 .muFunction { color: #af5f00; text-decoration: underline; }
 .muComment { color: #005faf; }
 -->
@@ -66,32 +72,32 @@ if ('onhashchange' in window) {
 <span id="L8" class="LineNr"> 8 </span><span class="muComment">#</span>
 <span id="L9" class="LineNr"> 9 </span><span class="muComment"># You'll need to register to download the 'input' file for yourself.</span>
 <span id="L10" class="LineNr">10 </span>
-<span id="L11" class="LineNr">11 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='5b.mu.html#L11'>main</a></span><span class="PreProc"> -&gt; </span>_/<span class="Constant">ebx</span>: int <span class="Delimiter">{</span>
+<span id="L11" class="LineNr">11 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='5b.mu.html#L11'>main</a></span><span class="PreProc"> -&gt; </span>_/<span class="muRegEbx">ebx</span>: int <span class="Delimiter">{</span>
 <span id="L12" class="LineNr">12 </span>  <span class="PreProc">var</span> pass-storage: (array int <span class="Constant">0x400</span>)  <span class="muComment"># 1k ints</span>
-<span id="L13" class="LineNr">13 </span>  <span class="PreProc">var</span> pass/<span class="Constant">esi</span>: (addr array int) <span class="Special">&lt;-</span> address pass-storage
+<span id="L13" class="LineNr">13 </span>  <span class="PreProc">var</span> pass/<span class="muRegEsi">esi</span>: (addr array int) <span class="Special">&lt;-</span> address pass-storage
 <span id="L14" class="LineNr">14 </span>  <span class="muComment"># phase 1: populate pass array</span>
 <span id="L15" class="LineNr">15 </span>  <span class="PreProc">var</span> line-storage: (stream byte <span class="Constant">0x10</span>)  <span class="muComment"># 16 bytes is enough</span>
-<span id="L16" class="LineNr">16 </span>  <span class="PreProc">var</span> line/<span class="Constant">edx</span>: (addr stream byte) <span class="Special">&lt;-</span> address line-storage
+<span id="L16" class="LineNr">16 </span>  <span class="PreProc">var</span> line/<span class="muRegEdx">edx</span>: (addr stream byte) <span class="Special">&lt;-</span> address line-storage
 <span id="L17" class="LineNr">17 </span>  <span class="Delimiter">{</span>
 <span id="L18" class="LineNr">18 </span>    <span class="muComment"># read line from stdin</span>
 <span id="L19" class="LineNr">19 </span>    <a href='../106stream.subx.html#L17'>clear-stream</a> line
 <span id="L20" class="LineNr">20 </span>    <a href='../305keyboard.subx.html#L158'>read-line-from-real-keyboard</a> line
 <span id="L21" class="LineNr">21 </span>    <span class="muComment"># if line is empty (not even a newline), quit</span>
-<span id="L22" class="LineNr">22 </span>    <span class="PreProc">var</span> done?/<span class="Constant">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
+<span id="L22" class="LineNr">22 </span>    <span class="PreProc">var</span> done?/<span class="muRegEax">eax</span>: boolean <span class="Special">&lt;-</span> <a href='../309stream.subx.html#L6'>stream-empty?</a> line
 <span id="L23" class="LineNr">23 </span>    compare done?, <span class="Constant">0</span>/false
 <span id="L24" class="LineNr">24 </span>    <span class="PreProc">break-if-!=</span>
 <span id="L25" class="LineNr">25 </span>    <span class="muComment"># process line</span>
-<span id="L26" class="LineNr">26 </span>    <span class="PreProc">var</span> seat-id/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> <a href='5b.mu.html#L57'>convert-from-binary</a> line
-<span id="L27" class="LineNr">27 </span>    <span class="PreProc">var</span> dest/<span class="Constant">eax</span>: (addr int) <span class="Special">&lt;-</span> index pass, seat-id
+<span id="L26" class="LineNr">26 </span>    <span class="PreProc">var</span> seat-id/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> <a href='5b.mu.html#L57'>convert-from-binary</a> line
+<span id="L27" class="LineNr">27 </span>    <span class="PreProc">var</span> dest/<span class="muRegEax">eax</span>: (addr int) <span class="Special">&lt;-</span> index pass, seat-id
 <span id="L28" class="LineNr">28 </span>    copy-to *dest, <span class="Constant">1</span>
 <span id="L29" class="LineNr">29 </span>    <span class="PreProc">loop</span>
 <span id="L30" class="LineNr">30 </span>  <span class="Delimiter">}</span>
 <span id="L31" class="LineNr">31 </span>  <span class="muComment"># phase 2: skip empty seats</span>
-<span id="L32" class="LineNr">32 </span>  <span class="PreProc">var</span> i/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L32" class="LineNr">32 </span>  <span class="PreProc">var</span> i/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
 <span id="L33" class="LineNr">33 </span>  <span class="Delimiter">{</span>
 <span id="L34" class="LineNr">34 </span>    compare i, <span class="Constant">0x400</span>
 <span id="L35" class="LineNr">35 </span>    <span class="PreProc">break-if-&gt;=</span>
-<span id="L36" class="LineNr">36 </span>    <span class="PreProc">var</span> src/<span class="Constant">ecx</span>: (addr int) <span class="Special">&lt;-</span> index pass, i
+<span id="L36" class="LineNr">36 </span>    <span class="PreProc">var</span> src/<span class="muRegEcx">ecx</span>: (addr int) <span class="Special">&lt;-</span> index pass, i
 <span id="L37" class="LineNr">37 </span>    compare *src, <span class="Constant">0</span>
 <span id="L38" class="LineNr">38 </span>    <span class="PreProc">break-if-!=</span>
 <span id="L39" class="LineNr">39 </span>    i <span class="Special">&lt;-</span> increment
@@ -101,7 +107,7 @@ if ('onhashchange' in window) {
 <span id="L43" class="LineNr">43 </span>  <span class="Delimiter">{</span>
 <span id="L44" class="LineNr">44 </span>    compare i, <span class="Constant">0x400</span>
 <span id="L45" class="LineNr">45 </span>    <span class="PreProc">break-if-&gt;=</span>
-<span id="L46" class="LineNr">46 </span>    <span class="PreProc">var</span> src/<span class="Constant">ecx</span>: (addr int) <span class="Special">&lt;-</span> index pass, i
+<span id="L46" class="LineNr">46 </span>    <span class="PreProc">var</span> src/<span class="muRegEcx">ecx</span>: (addr int) <span class="Special">&lt;-</span> index pass, i
 <span id="L47" class="LineNr">47 </span>    compare *src, <span class="Constant">0</span>
 <span id="L48" class="LineNr">48 </span>    <span class="PreProc">break-if-=</span>
 <span id="L49" class="LineNr">49 </span>    i <span class="Special">&lt;-</span> increment
@@ -112,14 +118,14 @@ if ('onhashchange' in window) {
 <span id="L54" class="LineNr">54 </span>  <span class="PreProc">return</span> <span class="Constant">0</span>
 <span id="L55" class="LineNr">55 </span><span class="Delimiter">}</span>
 <span id="L56" class="LineNr">56 </span>
-<span id="L57" class="LineNr">57 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='5b.mu.html#L57'>convert-from-binary</a></span> in: (addr stream byte)<span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int <span class="Delimiter">{</span>
-<span id="L58" class="LineNr">58 </span>  <span class="PreProc">var</span> result/<span class="Constant">edi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
-<span id="L59" class="LineNr">59 </span>  <span class="PreProc">var</span> i/<span class="Constant">ecx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">9</span>  <span class="muComment"># loop counter and also exponent</span>
+<span id="L57" class="LineNr">57 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='5b.mu.html#L57'>convert-from-binary</a></span> in: (addr stream byte)<span class="PreProc"> -&gt; </span>_/<span class="muRegEax">eax</span>: int <span class="Delimiter">{</span>
+<span id="L58" class="LineNr">58 </span>  <span class="PreProc">var</span> result/<span class="muRegEdi">edi</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L59" class="LineNr">59 </span>  <span class="PreProc">var</span> i/<span class="muRegEcx">ecx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">9</span>  <span class="muComment"># loop counter and also exponent</span>
 <span id="L60" class="LineNr">60 </span>  <span class="Delimiter">{</span>
 <span id="L61" class="LineNr">61 </span>    compare i, <span class="Constant">0</span>
 <span id="L62" class="LineNr">62 </span>    <span class="PreProc">break-if-&lt;</span>
-<span id="L63" class="LineNr">63 </span>    <span class="PreProc">var</span> c/<span class="Constant">eax</span>: byte <span class="Special">&lt;-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> in
-<span id="L64" class="LineNr">64 </span>    <span class="PreProc">var</span> bit/<span class="Constant">edx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L63" class="LineNr">63 </span>    <span class="PreProc">var</span> c/<span class="muRegEax">eax</span>: byte <span class="Special">&lt;-</span> <a href='../112read-byte.subx.html#L273'>read-byte</a> in
+<span id="L64" class="LineNr">64 </span>    <span class="PreProc">var</span> bit/<span class="muRegEdx">edx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0</span>
 <span id="L65" class="LineNr">65 </span>    <span class="Delimiter">{</span>
 <span id="L66" class="LineNr">66 </span>      compare c, <span class="Constant">0x42</span>/B
 <span id="L67" class="LineNr">67 </span>      <span class="PreProc">break-if-!=</span>
@@ -130,7 +136,7 @@ if ('onhashchange' in window) {
 <span id="L72" class="LineNr">72 </span>      <span class="PreProc">break-if-!=</span>
 <span id="L73" class="LineNr">73 </span>      bit <span class="Special">&lt;-</span> copy <span class="Constant">1</span>
 <span id="L74" class="LineNr">74 </span>    <span class="Delimiter">}</span>
-<span id="L75" class="LineNr">75 </span>    <span class="PreProc">var</span> bit-value/<span class="Constant">eax</span>: int <span class="Special">&lt;-</span> <a href='../406int32.mu.html#L5'>repeated-shift-left</a> bit, i
+<span id="L75" class="LineNr">75 </span>    <span class="PreProc">var</span> bit-value/<span class="muRegEax">eax</span>: int <span class="Special">&lt;-</span> <a href='../406int32.mu.html#L5'>repeated-shift-left</a> bit, i
 <span id="L76" class="LineNr">76 </span>    result <span class="Special">&lt;-</span> add bit-value
 <span id="L77" class="LineNr">77 </span>    i <span class="Special">&lt;-</span> decrement
 <span id="L78" class="LineNr">78 </span>    <span class="PreProc">loop</span>