1  FAT_Filenames
   FAT filenames referenced within EFI$CP always use a device or
   device alias name, and use backslashes as directory and filename
   delimiters.

   When referencing a directory, a trailing backslash is expected
   and must be present. If no trailing backslash is present,
   the trailing portion of the specification located after the
   final backslash is assumed to be a filename. The exception is
   CREATE/DIR which will assume a trailing backslash if not present.

   Both FAT short and long filenames are permitted, as are filenames
   containing various special characters as defined in the FAT
   specifications. FAT is case-preserving and case-blind.

   ddcu:\dir\subdir\file
   ddcu:\dir\subdir\file.ext
   ddcu:\dir\subdir\subdir2\
   "ddcu:\long name with spaces\"
 

2  Description
   Example filenames are available in the example. The first two
   example specifications reference FAT filenames, while the third
   example shown references a directory. The final shows use of
   double quotes, which are needed when the specification contains
   characters such as spaces, to specify a particular directory.

   Relative directory specifications and multiple FAT device mounts
   are not presently available; all FAT specifications are absolute,
   and only one FAT device can be mounted within EFI$CP at any one
   time. No wildcards are presently available.