Topic       : TOS - The Operating System
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View Ref-File11.5.15  MagiC's DFS-concept                                       TOS

MagiC, just as MultiTOS, enables the incorporation of alternative 
filesystems (so-called XFSs). Firmly integrated in MagiC is only a 
single XFS, the DOS_XFS. On top of this XFS sit in turn subdrivers, 
the so-called DFS (DOS filesystem), of which two are integrated in 
MagiC, namely the FAT filesystem and the U filesystem (that for the 
drive U:).

A DOS filesystem (DFS) is called by DOS_XFS. This includes only the 
file functions, while the management of directories is essentially 
taken over by the DOS_XFS. Further DFSs can be installed. The effort 
for a DFS is appreciably lower than for an XFS as many functions are 
performed already by the DOS_XFS. The vital prerequisite is a DOS- 
conforming directory structure (with 32-bit entries and filenames in 
the 8+3 format). This section deals with the items:

   . Make-up of a DFS
   . Data structures
   . Installation of a DFS

See also: MagiC's XFS-concept