Topic       : TOS - The Operating System
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View Ref-File14.8.4.1  Partition type RAW                                       TOS

XHDI-1.10 compliant drivers shall support the third partition type RAW 
(in addition to GEM and BGM). For these partitions, the following 
should be true:

 (1)  The partition size is `arbitrary' (32-bit sector numbers).

 (2)  The partition can be accessed as a BIOS device; Getbpb returns a 
      NULL pointer (so that GEMDOS won't access it; however, calling 
      Getbpb resets the driver internal media change state).

 (3)  Rwabs (in physical or logical mode) and XHReadWrite may be used 
      to access the partition. The physical block size of the medium 
      is used (see XHInqTarget).

 (4)  XHInqDev2 (as compared to XHInqDev) returns size and type of the 
      partition.

These extensions have been made to make it easier to create drivers 
for new filesystems for MiNT or MagiC (like the Minix filesystem).

See Also: XHDI specification   About the GEMDOS   About the BIOS