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| author | Kartik Agaram <vc@akkartik.com> | 2021-05-01 23:52:28 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2021-05-01 23:52:28 -0700 |
| commit | f0e146fc7b947bae526657d8c858a95319abf204 (patch) | |
| tree | 3886f4caa82a689df431b1342c85fa02dd138526 /html/boot.subx.html | |
| parent | f3fe2ac1953118b1a93828c718eaa9bdb3397939 (diff) | |
| download | mu-f0e146fc7b947bae526657d8c858a95319abf204.tar.gz | |
.
Diffstat (limited to 'html/boot.subx.html')
| -rw-r--r-- | html/boot.subx.html | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/html/boot.subx.html b/html/boot.subx.html index 6d2560d8..ed9ad698 100644 --- a/html/boot.subx.html +++ b/html/boot.subx.html @@ -76,9 +76,9 @@ if ('onhashchange' in window) { <span id="L16" class="LineNr"> 16 </span> <span id="L17" class="LineNr"> 17 </span><span class="subxComment"># Memory map of a Mu computer:</span> <span id="L18" class="LineNr"> 18 </span><span class="subxComment"># code: currently 4 tracks loaded from the primary disk to [0x00007c00, 0x00048600)</span> -<span id="L19" class="LineNr"> 19 </span><span class="subxComment"># stack: grows down from 0x00070000</span> -<span id="L20" class="LineNr"> 20 </span><span class="subxComment"># heap: [0x01000000, 0x02000000)</span> -<span id="L21" class="LineNr"> 21 </span><span class="subxComment"># see 120allocate.subx</span> +<span id="L19" class="LineNr"> 19 </span><span class="subxComment"># stack: grows down from 0x02000000 to 0x01000000</span> +<span id="L20" class="LineNr"> 20 </span><span class="subxComment"># heap: [0x02000000, 0x08000000)</span> +<span id="L21" class="LineNr"> 21 </span><span class="subxComment"># see 120allocate.subx; Qemu initializes with 128MB RAM by default</span> <span id="L22" class="LineNr"> 22 </span><span class="subxComment"># Consult <a href="https://wiki.osdev.org/Memory_Map_(x86)">https://wiki.osdev.org/Memory_Map_(x86)</a> before modifying any of</span> <span id="L23" class="LineNr"> 23 </span><span class="subxComment"># this. And don't forget to keep *stack-debug.subx in sync.</span> <span id="L24" class="LineNr"> 24 </span> @@ -101,7 +101,7 @@ if ('onhashchange' in window) { <span id="L41" class="LineNr"> 41 </span> 8e/->seg 3/mod/direct 0/rm32/ax 4/r32/fs <span id="L42" class="LineNr"> 42 </span> 8e/->seg 3/mod/direct 0/rm32/ax 5/r32/gs <span id="L43" class="LineNr"> 43 </span> -<span id="L44" class="LineNr"> 44 </span> <span class="subxComment"># initialize stack to 0x00070000</span> +<span id="L44" class="LineNr"> 44 </span> <span class="subxComment"># Temporarily initialize stack to 0x00070000 in real mode.</span> <span id="L45" class="LineNr"> 45 </span> <span class="subxComment"># We don't read or write the stack before we get to 32-bit mode, but BIOS</span> <span id="L46" class="LineNr"> 46 </span> <span class="subxComment"># calls do. We need to move the stack in case BIOS initializes it to some</span> <span id="L47" class="LineNr"> 47 </span> <span class="subxComment"># low address that we want to write code into.</span> @@ -269,7 +269,7 @@ if ('onhashchange' in window) { <span id="L209" class="LineNr"> 209 </span> 8e/->seg 3/mod/direct 0/rm32/ax 4/r32/fs <span id="L210" class="LineNr"> 210 </span> 8e/->seg 3/mod/direct 0/rm32/ax 5/r32/gs <span id="L211" class="LineNr"> 211 </span> -<span id="L212" class="LineNr"> 212 </span> bc/copy-to-esp 0x00070000/imm32 +<span id="L212" class="LineNr"> 212 </span> bc/copy-to-esp 0x02000000/imm32 <span id="L213" class="LineNr"> 213 </span> <span id="L214" class="LineNr"> 214 </span> <span class="subxComment">## load interrupt handlers</span> <span id="L215" class="LineNr"> 215 </span> <span class="subxComment"># We can't refer to the label directly because SubX doesn't do the right</span> |