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* 7674 - beginning of mouse driverKartik Agaram2021-01-281-12/+199
* 7673Kartik Agaram2021-01-282-2/+2
* 7672Kartik Agaram2021-01-272-51/+55
* 7671Kartik Agaram2021-01-275-53/+56
* 7670Kartik Agaram2021-01-271-23/+24
* 7569Kartik Agaram2021-01-271-2/+10
* 7568Kartik Agaram2021-01-271-0/+5
* 7567 - baremetal: shift-key supportKartik Agaram2021-01-273-31/+119
* 7566Kartik Agaram2021-01-271-3/+3
* 7565Kartik Agaram2021-01-241-1/+1
* 7564Kartik Agaram2021-01-241-18/+16
* 7563Kartik Agaram2021-01-241-45/+13
* 7562 - bochs working againKartik Agaram2021-01-242-24/+28
* 7561Kartik Agaram2021-01-241-11/+35
* 7560Kartik Agaram2021-01-241-1/+1
* 7559 - reorganize sectors built in raw hexKartik Agaram2021-01-2410-148/+273
* 7558Kartik Agaram2021-01-244-63/+63
* 7557Kartik Agaram2021-01-241-1/+1
* 7556Kartik Agaram2021-01-242-2/+2
* 7555 - snapshotKartik Agaram2021-01-241-13/+30
* 7554 - bug in an error handlerKartik Agaram2021-01-241-1/+1
* 7553Kartik Agaram2021-01-241-1/+17
* 7552 - I better understand a couple of thingsKartik Agaram2021-01-232-232/+256
* 7551Kartik Agaram2021-01-232-4/+4
* 7550Kartik Agaram2021-01-232-155/+153
* 7549Kartik Agaram2021-01-2336-1180/+9118
* 7548 - baremetal: better cursor managementKartik Agaram2021-01-236-44/+73
* 7547 - baremetal: rpn calculatorKartik Agaram2021-01-2211-8/+4219
* 7546 - baremetal: disk size checkKartik Agaram2021-01-222-0/+12
* 7545Kartik Agaram2021-01-221-28/+32
* 7544Kartik Agaram2021-01-221-1/+1
* 7543Kartik Agaram2021-01-221-11/+11
* 7542 - baremetal: support cursor on a graphemeKartik Agaram2021-01-224-18/+36
* 7541 - baremetal: debug screen test helpersKartik Agaram2021-01-221-7/+25
* 7540 - baremetal: cursorKartik Agaram2021-01-222-9/+19
* 7539 - baremetal: handle unrecognized keysKartik Agaram2021-01-221-7/+11
* 7538 - baremetal: screen coords in graphemesKartik Agaram2021-01-224-42/+54
* 7537 - baremetal: start of cursor supportKartik Agaram2021-01-193-7/+10
* 7536Kartik Agaram2021-01-191-7/+7
* 7535Kartik Agaram2021-01-176-14/+14
* 7534Kartik Agaram2021-01-172-25/+47
* 7533Kartik Agaram2021-01-163-0/+23
* 7532Kartik Agaram2021-01-161-2/+2
* 7531 - checking fake screensKartik Agaram2021-01-161-0/+145
* 7530 - baremetal: print ints to screenKartik Agaram2021-01-166-2/+807
* 7529 - baremetal: fake screenKartik Agaram2021-01-163-7/+214
* 7528 - heap allocatorKartik Agaram2021-01-164-4/+843
* 7527Kartik Agaram2021-01-162-0/+3
* 7526Kartik Agaram2021-01-1616-0/+14
* 7525Kartik Agaram2021-01-162-1/+37
lineNum.substr(1); /* strip off '#' */ if (lineNum.indexOf('L') == -1) { lineNum = 'L'+lineNum; } var lineElem = document.getElementById(lineNum); /* Always jump to new location even if the line was hidden inside a fold, or * we corrected the raw number to a line ID. */ if (lineElem) { lineElem.scrollIntoView(true); } return true; } if ('onhashchange' in window) { window.onhashchange = JumpToLine; } --> </script> </head> <body onload='JumpToLine();'> <a href='https://github.com/akkartik/mu/blob/main/101screen.subx'>https://github.com/akkartik/mu/blob/main/101screen.subx</a> <pre id='vimCodeElement'> <span id="L1" class="LineNr"> 1 </span><span class="subxComment"># Primitives for screen control.</span> <span id="L2" class="LineNr"> 2 </span><span class="subxComment">#</span> <span id="L3" class="LineNr"> 3 </span><span class="subxComment"># We need to do this in machine code because Mu doesn't have global variables</span> <span id="L4" class="LineNr"> 4 </span><span class="subxComment"># yet (for the start of video memory).</span> <span id="L5" class="LineNr"> 5 </span> <span id="L6" class="LineNr"> 6 </span>== code <span id="L7" class="LineNr"> 7 </span> <span id="L8" class="LineNr"> 8 </span><span class="subxFunction">pixel-on-real-screen</span>: <span class="subxComment"># x: int, y: int, color: int</span> <span id="L9" class="LineNr"> 9 </span> <span class="subxS1Comment"># . prologue</span> <span id="L10" class="LineNr">10 </span> 55/push-ebp <span id="L11" class="LineNr">11 </span> 89/&lt;- %ebp 4/r32/esp <span id="L12" class="LineNr">12 </span> <span class="subxComment">#</span> <span id="L13" class="LineNr">13 </span> (<a href='101screen.subx.html#L21'>pixel-on-screen-buffer</a> *<span class="SpecialChar"><a href='boot.subx.html#L651'>Video-memory-addr</a></span> *(ebp+8) *(ebp+0xc) *(ebp+0x10) 0x400 0x300) <span id="L14" class="LineNr">14 </span><span class="Constant">$pixel-on-real-screen:end</span>: <span id="L15" class="LineNr">15 </span> <span class="subxS1Comment"># . epilogue</span> <span id="L16" class="LineNr">16 </span> 89/&lt;- %esp 5/r32/ebp <span id="L17" class="LineNr">17 </span> 5d/pop-to-ebp <span id="L18" class="LineNr">18 </span> c3/return <span id="L19" class="LineNr">19 </span> <span id="L20" class="LineNr">20 </span><span class="subxComment"># 'buffer' here is not a valid Mu type: a naked address without a length.</span> <span id="L21" class="LineNr">21 </span><span class="subxFunction">pixel-on-screen-buffer</span>: <span class="subxComment"># buffer: (addr byte), x: int, y: int, color: int, width: int, height: int</span> <span id="L22" class="LineNr">22 </span> <span class="subxS1Comment"># . prologue</span> <span id="L23" class="LineNr">23 </span> 55/push-ebp <span id="L24" class="LineNr">24 </span> 89/&lt;- %ebp 4/r32/esp <span id="L25" class="LineNr">25 </span> <span class="subxS1Comment"># . save registers</span> <span id="L26" class="LineNr">26 </span> 50/push-eax <span id="L27" class="LineNr">27 </span> 51/push-ecx <span id="L28" class="LineNr">28 </span> <span class="subxComment"># bounds checks</span> <span id="L29" class="LineNr">29 </span> 8b/-&gt; *(ebp+0xc) 0/r32/eax <span class="subxComment"># foo</span> <span id="L30" class="LineNr">30 </span> 3d/compare-eax-and 0/imm32 <span id="L31" class="LineNr">31 </span> 7c/jump-if-&lt; $pixel-on-screen-buffer:end/disp8 <span id="L32" class="LineNr">32 </span> 3b/compare 0/r32/eax *(ebp+0x18) <span id="L33" class="LineNr">33 </span> 7d/jump-if-&gt;= $pixel-on-screen-buffer:end/disp8 <span id="L34" class="LineNr">34 </span> 8b/-&gt; *(ebp+0x10) 0/r32/eax <span id="L35" class="LineNr">35 </span> 3d/compare-eax-and 0/imm32 <span id="L36" class="LineNr">36 </span> 7c/jump-if-&lt; $pixel-on-screen-buffer:end/disp8 <span id="L37" class="LineNr">37 </span> 3b/compare 0/r32/eax *(ebp+0x1c) <span id="L38" class="LineNr">38 </span> 7d/jump-if-&gt;= $pixel-on-screen-buffer:end/disp8 <span id="L39" class="LineNr">39 </span> <span class="subxComment"># eax = y*width + x</span> <span id="L40" class="LineNr">40 </span> 8b/-&gt; *(ebp+0x10) 0/r32/eax <span id="L41" class="LineNr">41 </span> 0f af/multiply-&gt; *(ebp+0x18) 0/r32/eax <span id="L42" class="LineNr">42 </span> 03/add-&gt; *(ebp+0xc) 0/r32/eax <span id="L43" class="LineNr">43 </span> <span class="subxComment"># eax += location of frame buffer</span> <span id="L44" class="LineNr">44 </span> 03/add-&gt; *(ebp+8) 0/r32/eax <span id="L45" class="LineNr">45 </span> <span class="subxComment"># *eax = color</span> <span id="L46" class="LineNr">46 </span> 8b/-&gt; *(ebp+0x14) 1/r32/ecx <span id="L47" class="LineNr">47 </span> 88/byte&lt;- *eax 1/r32/CL <span id="L48" class="LineNr">48 </span><span class="Constant">$pixel-on-screen-buffer:end</span>: <span id="L49" class="LineNr">49 </span> <span class="subxS1Comment"># . restore registers</span> <span id="L50" class="LineNr">50 </span> 59/pop-to-ecx <span id="L51" class="LineNr">51 </span> 58/pop-to-eax <span id="L52" class="LineNr">52 </span> <span class="subxS1Comment"># . epilogue</span> <span id="L53" class="LineNr">53 </span> 89/&lt;- %esp 5/r32/ebp <span id="L54" class="LineNr">54 </span> 5d/pop-to-ebp <span id="L55" class="LineNr">55 </span> c3/return </pre> </body> </html> <!-- vim: set foldmethod=manual : -->