Int 2F Fn E200  - Securedevice - Login To Drive                            [y]

   AX = E200h
   DL = drive number (0 = A:)
   DS:SI -> 104-byte key

Return: AL = status
       00h unable to determine key's validity
       01h key is valid
       FFh key is invalid
Program: SecureDevice is a copylefted device driver by Max Loewenthal and
     Arthur Helwig which turns one or more disk files into encrypted
     logical drives

See Also: AX=E201h,AX=E203h,AX=E209h