But there was some ".as" files located on the Duck Tales disks.
Do these have anything to do with the assign commands?
No.
Possibly it uses some other way of recognizing disks. Usually, just copying everything into one directory (several if filename collisions occur) and ASSIGNing all the disk labels to that directory (or the appropriate one for several) works fine.
Dumbass routines that don't check for DISK1:filename, DISK2:filename but use a DF0:disk1file, DF0:disk2file scheme won't work with multiple floppy drives nor HDD nor anything else. You might get around that by killing DF0: and assigning it to the HDD folder - but any copy protection check will make all this futile.
