Format of BIOS switch-to-protected-mode Global Descriptor Table |
| Offset | Size | Description |
|---|---|---|
|
00h |
8 BYTEs |
null descriptor (initialize to zeros) |
|
08h |
8 BYTEs |
GDT descriptor (see #00501) |
|
10h |
8 BYTEs |
IDT descriptor |
|
18h |
8 BYTEs |
DS descriptor |
|
20h |
8 BYTEs |
ES |
|
28h |
8 BYTEs |
SS |
|
30h |
8 BYTEs |
CS |
|
38h |
8 BYTEs |
uninitialized, used to build descriptor for BIOS CS |