Does your Windows-TWAIN interface work under WINE using the ASPI interface?
If so you can simply start wine with -debmsg ASPI
and you get a nice listing about all SCSI activity.
I did that for the Coolscan LS-30 TWAIN driver.
It worked well for the first commands,
unfortunately the TWAIN driver hang up at autofocus under WINE
so I couldn't get all the way through the commands.
-Andreas
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