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Latest Update
2020-11-24
DOS - Jack R. Ellis Drivers
README file update only: See Section 6 for further HimemSX/JemmSX comments! NO driver changes; all are still dated 16-Nov-2020.

2020-11-15
DOS - Jack R. Ellis Drivers
XHDD now runs up to 12 disks on 6 controllers, for big "home user" PCs or workstations. XHDDjr renamed XHDD1, XDVDjr renamed XDVD3. Previous XHDD1 dropped. See the README Section 5 for normal driver combinations. Other drivers unchanged, re-dated only.

2020-11-4
DOS - Jack R. Ellis Drivers
Smaller XHDDjr and XDVDjr drivers added for most "home user" PCs with 1 or 2 disks and CD/DVD drives. Other drivers unchanged, re-dated only.

2020-10-23
DOS - Jack R. Ellis Drivers
README file update only -- See Section 6 below for "HimemSX" comments!! Other minor README updates, NO change to any drivers; all are still dated 18-Oct-2020.

2020-10-16
DOS - Jack R. Ellis Drivers
Smaller 12-disk XHDD1 driver added, identical in performance to the 20-disk XHDD, for "home user" PCs. Minor changes to XMGR/XDVD2. Other drivers unchanged, re-dated only.

2020-10-06
DOS - Jack R. Ellis Drivers
XHDD2 dropped (no user interest). Minor XHDD size changes. Other drivers unchanged, re-dated only.

2020-08-16
Vinyl Rescue Project
Replace Phono cartridge from Benz Micro McGold to Benz Micro McSiver for more output.

2020-07-03
DOS - Jack R. Ellis Drivers
XHDD/XHDD2 corrected for 4-bit controller numbers (not 3-bit as before)! PCs with <= 8 SATA/IDE controllers were not affected. Other drivers unchanged, re-dated only.

2020-06-30
DOS - Jack R. Ellis Drivers
XHDD2/XDVD2 code corrected for over 10 SATA/IDE controllers. Other drivers unchanged, re-dated only.

2020-06-23
DOS - Jack R. Ellis Drivers
XHDD back to 20 disks/diskettes and 9 controllers for "user" systems. New XHDD2 now runs up to 32 disks/diskettes on up to 15 SATA/IDE controllers, for PC/104 and other large industrial DOS systems. XMGR's "I-O Catcher" handles up t0 32 disks. Other drivers unchanged, re-dated only.

2020-06-16
DOS - Jack R. Ellis Drivers
XMGR/XHDD again handle up to 24 disks/diskettes on up to 10 SATA/IDE controllers, and XDVD2 again handles up to 4 CD/DVD drives, for industrial DOS systems. RDISK unchanged (re-dated only).

2020-05-26
DOS - Jack R. Ellis Drivers
XMGR and XHDD now do XMS moves in 8K blocks with 486+ CPUs, 4K blocks on slow 386 CPUs. XHDD size reduced by better XMS logic. Other drivers unchanged (re-dated only).

2020-05-16
DOS - Jack R. Ellis Drivers
XHDD 2.5-MB cache size and support for 80386 CPUs re-added. See the README Section 6 for info on the 2.5/5-MB caches. Other drivers unchanged, re-dated only.

2020-04-21
DOS - Jack R. Ellis Drivers
Minor XMGR and XHDD code changes. Minor update re: "cheap BIOS" mainboard use; see the README file Section 6. No change to the other drivers (re-dated only).

2019-11-20
DOS - Jack R. Ellis Drivers
XHDD search buffer and /P switch deleted; of no value, with /O "overlap". XHDD now uses 720 "base" + 2080 HMA bytes for all caches! Other drivers unchanged, re-dated only.

2019-10-24
DOS - Jack R. Ellis Drivers
XHDD resident search table deleted; /P now sets a fixed 512 byte search buffer. HUGE memory saving for a very minor speed drop! Other drivers unchanged, re-dated only.