Format of DOS 3.x disk buffer |
| Offset | Size | Description |
|---|---|---|
|
00h |
DWORD |
pointer to next disk buffer, offset = FFFFh if last least-recently used buffer is first in chain |
|
04h |
BYTE |
drive (0=A,1=B, etc), FFh if not in use |
|
05h |
BYTE |
buffer flags (see #01651) |
|
06h |
WORD |
logical sector number |
|
08h |
BYTE |
number of copies to write (1 for non-FAT sectors) |
|
09h |
BYTE |
sector offset between copies if multiple copies to be written |
|
0Ah |
DWORD |
pointer to DOS Drive Parameter Block (see #01395 at AH=32h) |
|
0Eh |
WORD |
unused??? (almost always 0) |
|
10h |
|
buffered data |
|
See Also: |