Kasha Memline 2024AD
| Fizik Address | Pages | Type | Detail 32 |
|---|---|---|---|
| 00000000~000003FF | 00 | fixed | IVT Page (Realors) |
| 00000400~000004FF | 00 | fixed | BIOS Data Area |
| 00000500~000005FF | 00 | fixed | KASHA Data Area |
| 00000600~000007FF | 00 | fixed | Kernel Stack (DF=1) |
| 00000800~00000FFF | 01 | TDM | R16 Kernel Buffer P32 IVT Page (Selectors) |
| Kernel Area | |||
| 00001000~00001FFF | 01 | resident since kernel | PT for High Reflect (00000000~003FFFFF) |
| 00002000~00002FFF | 01 | resident | PDT for Kernel |
| 00003000~00003FFF | 01 | fixed | Stack |
| 00004000~0000407F | 00 | resident | TSS for Shell Real-16 |
| 00004080~000040FF | 00 | resident | TSS for Shell Prot-32 |
| 00004100~00004FFF | 01 (480 GDTE) | resident | GDT |
| 00005000~0000FFFF | 11 | resident | Kernel (Real-16 + Flap-32) |
| >00005000~000057FF | Kernel.Data | ||
| >00005800~00007BFF | Kernel.Code | ||
| >00008000~00009FFF | Shell16.Data | ||
| >0000A000~0000BFFF | Shell16.Code | ||
| >0000C000~0000FFFF | Rest Kernel Area | ||
| 00010000~0005FFFF | 80 | active | Least User Area |
| 00060000~0007FFFF | 32 | fixed | Page Allocating Bitmap |
| 00080000~0009FFFF | 32 | fixed | Extended BIOS Data Area |
| Upper Reflect Area (Over 640KB) | |||
| 000A0000~000BFFFF | 96 | fixed | Video Display Memory |
| 000C0000~000C7FFF | ↑ | fixed | Video BIOS |
| 000C8000~000EFFFF | ↑ | fixed | BIOS Expansions |
| 000F0000~000FFFFF | ↑ | fixed | Mainboard BIOS |
| 000B8000~000BFFFF | fixed | Video Display Buffer 32K | |
| User Area | |||
| 00100000~00400000 | 768 | Extend-32 User Area | |
| ... |
- TDM abbreviation of time-division multiplexing.
- Least Phyzical Memory 4M.
- Total Size of Pages 1024.
- High Reflect Linear Address = Logical Address - 0x80000000 (Logical Address >= 0x80000000)
- Kernel will always give IP to shell after finishing its work.
Special
- FFC00000~FFFFEFFF → PTs
- FFFFF000~FFFFFFFF → 00005000~00005FFF (PDT)
Detail
10000 -> 11FFF Buffer
12000 Shell32 Raw File
- Shell32 Data: 0x21000 -> 0x22000
- Shell32 Code: 0x22000 -> 0x24000
- SubappA Data: 0x24000 -> 0x25000
- SubappA Code: 0x25000 -> 0x26000
- SubappB Data: 0x26000 -> 0x27000
- SubappB Code: 0x27000 -> 0x28000
- SubappC Data: 0x28000 -> 0x29000
- SubappC Code: 0x29000 -> 0x2A000
0x50000 TEMP PT (0x40'0000)
//{TODO} combinate TSS and LDT and others into "Task Block"
//{TEMP} TSS and LDT 0x2xxxx
//{TEMP} SubappABC Raw: 0x30000 ->
Memory Bitmap
To register in GPDT and allocate room.
00000000 FF 00 00 00-00 00 00 00=00 00 00 00-00 00 00 00
00080000 FF FF FF FF-FF FF FF FF=FF FF FF FF-FF FF FF FF
00100000 00 00 00 00-00 00 00 00=00 00 00 00-00 00 00 00
00180000 00 00 00 00-00 00 00 00=00 00 00 00-00 00 00 00
00200000 00 00 00 00-00 00 00 00=00 00 00 00-00 00 00 00
00280000 00 00 00 00-00 00 00 00=00 00 00 00-00 00 00 00
00300000 00 00 00 00-00 00 00 00=00 00 00 00-00 00 00 00
00380000 00 00 00 00-00 00 00 00=00 00 00 00-00 00 00 00
00400000 FF FF FF FF...
A digit stands 4×4k=16k(0x4000);
A line stands 16k×2×16=512k=pow2(19)=0x80000;
Variables
Address: 0x500 ~ 0x5FF
| Offset | Object | Initialization | Description |
|---|---|---|---|
| 00 word | IP of Prot-32 Entry | ||
| 02 word | CS of Prot-32 Entry | ||
| 04 word | GDT32 Length | ||
| 06 dword | GDT32 Address | ||
| 0A word | IVT32 Length | ||
| 0C dword | IVT32 Address | ||
| 10 qword | zero | ||
| 18 dword | CurrentScreenMode | ||
| 1C dword | ConsoleForeColor (BackColor) | ||
| 20 dowrd | ConsoleDefaultColor (PenColor) | ||
| 24 dword | Count : Rotate Seconds | 0->FFFFFFFF->0->... | |
| 28 word | Count: Rotate Millisecond | ||
| 2A word | Simple Kernel Memory Pointer | 0x8000 | 0x0000 for full |
| 2C dword | Simple User Memory Pointer | 0x00010000 | 0x00000000 for full |
| 30 dword | Global Keyword Queue | putptr+getptr+data | |
| 34 dword | ReadyFlag1 | MSB 31:SwitchTaskReady, LSB |
|
| 38 dword | TasksAvailableSelectorsPointer | First One is the numbers |
Global Segment
| Segment (Hex) | Ring | Description |
|---|---|---|
| 00 - 7080 | / | null |
| 01 - 7088 | 0 | 4G R0 32 DATA and STAK |
| 02 - 7090 | 0 | 4G R0 32 CODE |
| 03 - 7098 | 0 | |
| 04 - 70A0 | 0* | B8000 VIDEO |
| 05 - 70A8 | 0 | |
| 06 - 70B0 | 3 | 32-Protect Call Gate |
| 07 - 70B8 | 0 | Kernel (Loaded by ENTRY-MBR) TSS |
| 08 - 70C0 | / | todoGlobal-Data-R1 |
| 09 - 70C8 | / | todoGlobal-Data-R2 |
| 0A - 70D0 | / | todoGlobal-Data-R3 |
| 0B - 70D8 | / | todoGlobal-Code-R3 |
| 0C - 70E0 | / | kept |
| 0D - 70E8 | / | kept |
| 0E - 70F0 | / | kept |
| 0F - 70F8 | / | kept |
| 10 - 7100 | 3 | Sub-app 0 LDT |
| 11 - 7108 | 3 | Sub-app 0 TSS |
| 12 - 7110 | 3 | Sub-app 1 LDT |
| xx - 7100+8+n×10 | 3 | ... Sub-app n TSS |
Local Segment
| Segment (Hex) | Ring | Description |
|---|---|---|
| 00 | 3 | Header |
| 01 | 3 | Code |
| 02 | 3 | Data |
| 03 | 3 | Ronl |
| 04 | 3 | SS0 4k |
| 05 | 3 | SS1 4k |
| 06 | 3 | SS2 4k |
| 07 | 3 | SS3 4nk |