Format of global descriptor table |
| Offset | Size | Description | |
|---|---|---|---|
|
00h |
16 BYTEs |
zeros (used by BIOS) | |
|
10h |
WORD |
source segment length in bytes (2*CX-1 or greater) | |
|
12h |
3 BYTEs |
24-bit linear source address, low byte first | |
|
15h |
BYTE |
source segment access rights (93h) | |
|
16h |
WORD |
(286) | zero |
| (386+) | extended access rights and high byte of source address | ||
|
18h |
WORD |
destination segment length in bytes (2*CX-1 or greater) | |
|
1Ah |
3 BYTEs |
24-bit linear destination address, low byte first | |
|
1Dh |
BYTE |
destination segment access rights (93h) | |
|
1Eh |
WORD |
(286) | zero |
| (386+) | extended access rights and high byte of destination address | ||
|
20h |
16 BYTEs |
zeros (used by BIOS to build CS and SS descriptors) | |