USBASPI.sys  
(ver 2.20)
Abandoned Freeware


USBASPI.SYS is the hardware ASPI manager for USB mass-storage devices 
(it assigns a logical unit number, just like the driver required for 
CD-ROMs).  As with a CD-ROM driver (which uses MSCDEX), USBASPI must 
also be used in conjunction with a driver that assigns DOS drive 
letters (such as NJ32DISK.SYS).  

USBASPI allows 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.  


Now With Version 2.20, even if USBASPI does not find any USB mass-storage 
devices on bootup, it will still load itself into memory (it uses about 
14k), but a drive letter driver (such as NJ32DISK) obviously will not.



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The driver switches you can use are: 
device=(path)\USBASPI.SYS [/e] [/o] [/u] [/v] [/l[=n]] [/slow] [/w] [/nocbc] [/r] [/norst] [/noprt] [/f]


You can specify more than one controller type (e.g. /e /u). These switches can also 
be used to force slower speed operation on high-speed USB controllers & devices.
The driver will scan for all types of USB controllers by default, so use these 
switches to specify which port types to enable. This allows for faster USB scanning. 
By specifying /u or /o and omitting /e, it forces Full-Speed mode on High-Speed 
devices. One can't make a Low- or Full-Speed device run at High-Speed:

/e, (EHCI) for enabling only USB 2.0 controller
/o, (OHCI) for enabling only add-on/onboard USB 1.1 controller
/u, (UHCI) for enabling integrated USB 1.1 controller


In verbose mode. USBASPI displays details on controller type and USB devices it 
detects. It displays the vendor & product ID codes, the controller address range 
(memory map or I/O port map) of controllers, and the connection speed code for 
each device:

/v, (Verbose) shows USB details - excellent troubleshooting tool


These switches modify driver actions:

/l[=n], (LUN Number) to specify highest LUN number assigned. Default = /L0
/slow, (Enter Slow Down mode) gives longer delays when scanning USB devices
/w, (Wait) displays prompt message to allow swapping/attaching of target USB device
/nocbc, (NO Card Bus Controller?) to disable detection of USB on CardBus slots


This switch is typically used on portable systems with an external USB floppy drive 
connected to the single USB port for boot-up. Used in conjunction with RAMFD.SYS so 
after the boot floppy is copied to a RAM drive, (and after the /W pause...) the USB 
floppy can be removed, and the target mass storage device can be attached and detected:

/r, (Resident) allows driver to stay resident in memory when USB floppy drive is detected.


The remaining 3 switches:
/norst, seems to prevent resets, and probably is necessary if you connect an USB mouse 
/noprt, is still of unknown function (but perhaps associated with I/O port mapping?)
/f, is still of unknown function