Format of Stacker v2+ device driver |
| Offset | Size | Description | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
00h |
DWORD |
pointer to next driver, offset=FFFFh if last driver FFFFh:FFFFh for Stacker Anywhere |
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|
04h |
WORD |
device attributes (see #01647,#01648) | |||||||||
|
06h |
WORD |
device strategy entry point | |||||||||
|
08h |
WORD |
device interrupt entry point | |||||||||
|
0Ah |
BYTE |
number of subunits (drives) supported by driver 0 for Stacker Anywhere |
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|
0Bh |
7 BYTEs |
signature "STAC-CD" for Stacker and Stacker Anywhere | |||||||||
|
12h |
7 BYTEs |
??? | |||||||||
|
19h |
BYTE |
always = 01h ?? (Stacker Anywhere points here) | |||||||||
|
1Ah |
WORD |
signature A55Ah (all other Stacker versions point here) | |||||||||
|
1Ch |
WORD |
Stacker version * 64h
|
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|
1Eh |
WORD |
offset of volume-specific information offset table (list of WORDs, one per drive, containing offsets to various information) | |||||||||
|
20h |
56 BYTEs |
n/a | |||||||||
|
58h |
BYTE |
volume number, set after INT 21/AX=4404h, INT 21/AX=4408h (use to index into volume-specific info offset table, should be set to FFh before and tested for change after) | |||||||||
|
59h |
19 BYTEs |
n/a | |||||||||
|
6Ch |
4 BYTEs |
ASCII string "SWAP" | |||||||||
|
70h |
26 BYTEs |
drive mapping table (one byte for each drive A: through Z:) (only used for drives swapped by SSWAP.COM; other drives compressed by Stacker can be found with the standard device driver header signature (see INT 21/AH=52h) | |||||||||
|
---Stacker 4, Stacker Anywhere--- |
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|
8Ah |
40 BYTEs |
??? | |||||||||
|
B2h |
4 BYTEs |
ASCII string "SWP2" | |||||||||
|
B6h |
26 BYTEs |
drive table ??? | |||||||||
|
D0h |
150 BYTEs |
??? | |||||||||
|
166h |
60 BYTEs |
LZSINFO structure (see #02808 at INT 2F/AX=4A12h) | |||||||||
|
See Also: |