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
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
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
0C8h = 200, 012Ch = 300, 0190h = 400 (also Stacker Anywhere)
1Eh WORD offset of volume-specific information offset table
(list of WORDs, one per drive, containing offsets to various
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---
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)
SeeAlso: #02551,#01646 at INT 21/AH=52h