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| author | Freya Murphy <freya@freyacat.org> | 2025-04-03 16:46:43 -0400 |
|---|---|---|
| committer | Freya Murphy <freya@freyacat.org> | 2025-04-03 16:46:43 -0400 |
| commit | af90a91457416a85525cd2d16f5e1b0ca828b069 (patch) | |
| tree | d1cd155d53ea824315ffff43fbf05e59adf5adec /doc/Memory.txt | |
| parent | grub (diff) | |
| download | comus-af90a91457416a85525cd2d16f5e1b0ca828b069.tar.gz comus-af90a91457416a85525cd2d16f5e1b0ca828b069.tar.bz2 comus-af90a91457416a85525cd2d16f5e1b0ca828b069.zip | |
remove doc
Diffstat (limited to 'doc/Memory.txt')
| -rw-r--r-- | doc/Memory.txt | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/doc/Memory.txt b/doc/Memory.txt deleted file mode 100644 index cecfea3..0000000 --- a/doc/Memory.txt +++ /dev/null @@ -1,92 +0,0 @@ -Systems Programming framework memory layout - -Version: @(#)Memory.txt 2.2a -Date: 3/23/25 ---------------------------------------------------------------------------- - -This diagram shows important areas in the first 1MB of memory as seen -by the standalone framework code. - -Each row in the diagram represents 0x100 (256) bytes of memory, except in -"elided" areas (< ... >). The starting address is indicated for each -region in hex; if a CPP #define exists for that region in either -bootstrap.h or x86/bios.h, its name is also given. - - ----------------------- - | Interrupt Vector | 0x00000 - | 256 x 4 bytes | - | (1024, 0x400) | - | | - ----------------------- - | BIOS Data Area (BDA)| 0x00400 BIOS_BDA - ----------------------- - | GDT | 0x00500 GDT_ADDR - | 1024 x 8 bytes | - | (8192, 0x2000) | - | | - < . . . > - | | - ----------------------- - | IDT | 0x02500 IDT_ADDR - | 256 x 8 bytes | - | (2048, 0x800) | - | | - | | - | | - | | - | | - ----------------------- - | Mmap data | 0x02D00 MMAP_ADDR - | | - | | - | | - | | - < . . . > - | | - ----------------------- - | Bootstrap sector 1 | 0x07c00 BOOT_ADDR - | | - ----------------------- - | Bootstrap sector 2 | 0x07e00 PART2_ADDR - | | - ----------------------- - | | 0x08000 - | | - < . . . > - | ^ | - | Bootstrap stack | | - ----------------------- - | | 0x0bc00 BOOT_SP_ADDR - | | - | | - < . . . > - | OS stack | - ----------------------- - | Operating System | 0x10000 TARGET_ADDR, TARGET_STACK - | (size varies) | - | | - < . . . > - | | - ----------------------- - | User Code Blob | 0x30000 - | (size varies) | - | | - < . . . > - | | - ----------------------- - | Extended BIOS Data | 0x9fc00 - | Area (EBDA) | - | | - < . . . > - | | - ----------------------- - | Video memory | 0xb8000 VID_BASE_ADDR - | | - < . . . > - | | - ----------------------- - | The BIOS | 0xf0000 - | | - < . . . > - | | - ----------------------- 0xfffff |