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<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="SalientComment">## first program: same as <a href="https://www.muppetlabs.com/~breadbox/software/tiny/teensy.html">https://www.muppetlabs.com/~breadbox/software/tiny/teensy.html</a></span>
<span id="L2" class="LineNr"> 2 </span><span class="Comment"># Just return 42.</span>
<span id="L3" class="LineNr"> 3 </span><span class="Comment">#</span>
<span id="L4" class="LineNr"> 4 </span><span class="Comment"># To run:</span>
<span id="L5" class="LineNr"> 5 </span><span class="Comment"># $ subx translate ex1.1.subx ex1</span>
<span id="L6" class="LineNr"> 6 </span><span class="Comment"># $ subx run ex1</span>
<span id="L7" class="LineNr"> 7 </span><span class="Comment"># Expected result:</span>
<span id="L8" class="LineNr"> 8 </span><span class="Comment"># $ echo $?</span>
<span id="L9" class="LineNr"> 9 </span><span class="Comment"># 42</span>
<span id="L10" class="LineNr">10 </span>
<span id="L11" class="LineNr">11 </span>== code
<span id="L12" class="LineNr">12 </span><span class="Comment"># opcode ModR/M SIB displacement immediate</span>
<span id="L13" class="LineNr">13 </span><span class="Comment"># instruction mod, reg, Reg/Mem bits scale, index, base</span>
<span id="L14" class="LineNr">14 </span><span class="Comment"># 1-3 bytes 0/1 byte 0/1 byte 0/1/2/4 bytes 0/1/2/4 bytes</span>
<span id="L15" class="LineNr">15 </span> bb 2a 00 00 00 <span class="Comment"># copy 0x2a (42) to EBX</span>
<span id="L16" class="LineNr">16 </span> <span class="Comment"># exit(EBX)</span>
<span id="L17" class="LineNr">17 </span> b8 01 00 00 00 <span class="Comment"># copy 1 to EAX</span>
<span id="L18" class="LineNr">18 </span> cd 80 <span class="Comment"># int 80h</span>
<span id="L19" class="LineNr">19 </span>
<span id="L20" class="LineNr">20 </span><span class="Comment"># vim:ft=subx</span>
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