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| author | Kartik Agaram <vc@akkartik.com> | 2020-12-29 20:50:55 -0800 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2020-12-29 20:50:55 -0800 |
| commit | 63a247fcd4c7597c93e28fc92e489a7882ae2d7c (patch) | |
| tree | 3467e10383d9cc8b7cb99e72eaa21c6ef542469b /html/baremetal/ex2.subx.html | |
| parent | 562476d7509a17f6155dc8bead6bd2565fde48cb (diff) | |
| download | mu-63a247fcd4c7597c93e28fc92e489a7882ae2d7c.tar.gz | |
7468
Diffstat (limited to 'html/baremetal/ex2.subx.html')
| -rw-r--r-- | html/baremetal/ex2.subx.html | 51 |
1 files changed, 26 insertions, 25 deletions
diff --git a/html/baremetal/ex2.subx.html b/html/baremetal/ex2.subx.html index ae4eb8a8..12c06aeb 100644 --- a/html/baremetal/ex2.subx.html +++ b/html/baremetal/ex2.subx.html @@ -60,33 +60,34 @@ if ('onhashchange' in window) { <span id="L6" class="LineNr"> 6 </span><span class="subxComment"># qemu-system-i386 disk.img</span> <span id="L7" class="LineNr"> 7 </span><span class="subxComment"># Or:</span> <span id="L8" class="LineNr"> 8 </span><span class="subxComment"># bochs -f baremetal/boot.bochsrc # boot.bochsrc loads disk.img</span> -<span id="L9" class="LineNr"> 9 </span> -<span id="L10" class="LineNr">10 </span><span class="subxComment"># main: (address 0x8800)</span> -<span id="L11" class="LineNr">11 </span> -<span id="L12" class="LineNr">12 </span>== code -<span id="L13" class="LineNr">13 </span> -<span id="L14" class="LineNr">14 </span><span class="subxComment"># ecx <- start of video memory</span> -<span id="L15" class="LineNr">15 </span>8b/-> 0/mod/indirect 5/rm32/use-disp32 0x7f28/disp32/video-memory 1/r32/ecx +<span id="L9" class="LineNr"> 9 </span><span class="subxComment">#</span> +<span id="L10" class="LineNr">10 </span><span class="subxComment"># Expected output:</span> +<span id="L11" class="LineNr">11 </span><span class="subxComment"># html/baremetal.png</span> +<span id="L12" class="LineNr">12 </span> +<span id="L13" class="LineNr">13 </span><span class="subxComment"># main: (address 0x8800)</span> +<span id="L14" class="LineNr">14 </span> +<span id="L15" class="LineNr">15 </span>== code <span id="L16" class="LineNr">16 </span> -<span id="L17" class="LineNr">17 </span><span class="subxComment"># eax <- final pixel of video memory</span> -<span id="L18" class="LineNr">18 </span>8d/copy-address *(ecx + 0x0bffff) 0/r32/eax <span class="subxComment"># 0xbffff = 1024*768 - 1</span> +<span id="L17" class="LineNr">17 </span><span class="subxComment"># ecx <- start of video memory</span> +<span id="L18" class="LineNr">18 </span>8b/-> *0x7f28 1/r32/ecx <span id="L19" class="LineNr">19 </span> -<span id="L20" class="LineNr">20 </span><span class="subxComment"># for each pixel in video memory</span> -<span id="L21" class="LineNr">21 </span>{ -<span id="L22" class="LineNr">22 </span> 39/compare %eax 1/r32/ecx -<span id="L23" class="LineNr">23 </span> 7c/jump-if-< <span class="Constant">break</span>/disp8 -<span id="L24" class="LineNr">24 </span> <span class="subxComment"># write its column number to it</span> -<span id="L25" class="LineNr">25 </span> 88/byte<- *eax 0/r32/AL -<span id="L26" class="LineNr">26 </span> 48/decrement-eax -<span id="L27" class="LineNr">27 </span> eb/jump <span class="Constant">loop</span>/disp8 -<span id="L28" class="LineNr">28 </span>} -<span id="L29" class="LineNr">29 </span> -<span id="L30" class="LineNr">30 </span><span class="subxComment"># hang indefinitely</span> -<span id="L31" class="LineNr">31 </span>{ -<span id="L32" class="LineNr">32 </span> eb/jump <span class="Constant">loop</span>/disp8 -<span id="L33" class="LineNr">33 </span>} -<span id="L34" class="LineNr">34 </span> -<span id="L35" class="LineNr">35 </span><span class="subxComment"># vim:ft=subx</span> +<span id="L20" class="LineNr">20 </span><span class="subxComment"># eax <- final pixel of video memory</span> +<span id="L21" class="LineNr">21 </span>8d/copy-address *(ecx + 0x0bffff) 0/r32/eax <span class="subxComment"># 0xbffff = 1024*768 - 1</span> +<span id="L22" class="LineNr">22 </span> +<span id="L23" class="LineNr">23 </span><span class="subxComment"># for each pixel in video memory</span> +<span id="L24" class="LineNr">24 </span>{ +<span id="L25" class="LineNr">25 </span> 39/compare %eax 1/r32/ecx +<span id="L26" class="LineNr">26 </span> 7c/jump-if-< <span class="Constant">break</span>/disp8 +<span id="L27" class="LineNr">27 </span> <span class="subxComment"># write its column number to it</span> +<span id="L28" class="LineNr">28 </span> 88/byte<- *eax 0/r32/AL +<span id="L29" class="LineNr">29 </span> 48/decrement-eax +<span id="L30" class="LineNr">30 </span> eb/jump <span class="Constant">loop</span>/disp8 +<span id="L31" class="LineNr">31 </span>} +<span id="L32" class="LineNr">32 </span> +<span id="L33" class="LineNr">33 </span><span class="subxComment"># hang indefinitely</span> +<span id="L34" class="LineNr">34 </span>{ +<span id="L35" class="LineNr">35 </span> eb/jump <span class="Constant">loop</span>/disp8 +<span id="L36" class="LineNr">36 </span>} </pre> </body> </html> |