USBASPI.SYS is the ASPI manager for USB mass-storage devices (it
assigns a logical unit number).
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NJ32DISK.sys
(ver 1.06)
NJ32DISK.SYS is the ASPI disk driver for USB mass-storage devices (it
assigns a DOS drive letter).
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These two USB 2.0 drivers work in conjunction to allow USB mass-storage
devices such as Thumb-drives (Jump-drives, AdSticks, etc) to be used
with DOS. Please note that these devices must be connected during DOS
bootup, or they will not later be recognized (I don't think anyone has
yet bothered to write a DOS TSR that will allow hot-plugging USB
devices the way you can do it in Ms-Windows).
Run USBASPI before NJ32DISK (similar to the way you first run the
cd-rom ASPI driver before running MSCDEX). If USBASPI does not find
any USB mass-storage devices on bootup, it will not load (and NJ32DISK
will not assign any drive letters). Drive letters assigned will come
after the internal Floppy drive, Hard drive, and other bios established
storage devices have been assigned drive letters.
This driver will assign its USB drive letters before the CD/DVD gets
assigned their drive letters (due to NJ32DISK being loaded in
Config.sys wheras the CD/DVD MSCDEX driver is loaded in Autoexec.bat).
Therefore to keep your CD/DVD drive letters consistant,
it is suggested that you always boot with the USB mass-storage
devices connected. After a drive letter has been assigned, you can
remove and replace the mass-storage media in a similar fashion as you
can remove and replace floppy diskettes (the cache may have to be
refreshed to recognize the media change though, just as you must often
do with floppy diskettes).
Note: With the recent availability of plug-in mass-storage devices
(USB drives, Camera memory cards, external drives, etcetera), plus the
ability to virtually swap letters via software, DOS drive lettering is
becomming inconsistant. It is therefore highly recommended that you
use previously often ignored recommendation of using virtual paths
without specifying drive letters when you configure your application
software settings.
