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Latest Update
2021-11-17
DOS - Jack R. Ellis Drivers
XHDD now handles up to 15 BIOS disks using up to 6 UltraDMA controllers, to support larger workstations (only 48 more HMA bytes, XHDD.SYS still only 4.5K!). Minor Init ERROR in the noncached XHDD is fixed. Other drivers unchanged (re-dated only).

2021-11-06
DOS - Jack R. Ellis Drivers
Minor XHDD size drop (32 bytes less). README file updated re: XHDD /B and /E switches and protected-mode tech notes in Section 6. Other drivers unchanged, re-dated only.

2021-10-24
DOS - Jack R. Ellis Drivers
XHDD now uses its caching logic for noncached work. Prior noncached logic deleted. Saves over THREE HUNDRED bytes and gives XHDD.SYS a 4.5K size for "boot" diskettes etc.! All XHDD features, switches, and caching speeds remain as before! Other drivers unchanged, re-dated only.

2021-10-17
DOS - Jack R. Ellis Drivers
README protected-mode CONFIG.SYS example files in Section 5 and comments in Section 6 updated. NO changes to any of the drivers; all are still dated 6-Jun-2021.

2021-06-06
DOS - Jack R. Ellis Drivers
XHDD now handles up to 10 BIOS disks using up to 4 UltraDMA controllers; uses only 16 more HMA bytes! XHDD2 dropped (unneeded now). Other drivers unchanged, re-dated only.

2021-05-23
Vinyl Rescue Project Update
Equipment and service charge update.

2021-04-23
DOS - Jack R. Ellis Drivers
XHDD/XHDD2 "extra" XMS logic deleted (was LOSING time), for 1% faster protected-mode speed! Other drivers unchanged (re-dated only).

2021-04-17
DOS - Jack R. Ellis Drivers
XHDD/XHDD2 re-add /P resident search-table logic for faster cache speed with SSD/NVmE "disks". See the /P notes in Section 6 of this README for a full description. Other drivers unchanged, re-dated only.

2021-03-10
DOS - Jack R. Ellis Drivers
XHDD/XHDD2 re-add extra XMS logic and better "VDS" code (48 more HMA bytes) for more caching speed with fast SSD/NVmE "disks". Other drivers unchanged, re-dated only.

2021-02-27
DOS - Jack R. Ellis Drivers
XHDD.SYS and XHDD2.SYS are now 4736 bytes each and assemble from a common XHDD.ASM file, for more reliability and FAR easier updates! Other drivers unchanged, re-dated only.

2021-02-12
DOS - Jack R. Ellis Drivers
XHDD now handles 8 BIOS disks using 3 UltraDMA controllers, for most user PCs. New XHDD2 runs 14 BIOS disks using 6 ULtraDMA controllers, for workstations or other large DOS systems. Both set ALL cache sizes from 5-MB to 4-GB and will use Read-Ahead and Overlap (with /O) for all caches, to speed up PCs having < 16-MB of memory! Other drivers unchanged, re-dated only.

2021-01-26
DOS - Jack R. Ellis Drivers
README file updated and minimized. NO driver changes, all are still dated 23-Jan-2021.

2021-01-21
DOS - Jack R. Ellis Drivers
XHDD 2.5-MB cache and 80386 support dropped (of little use). Run-time XHDD is smaller by 48 HMA bytes. Other drivers unchanged, re-dated only.