Int 62 Fn 00CB  u - Fgdriver V4.02 - "fg_unpack" - Expand Mode-specific B  [V]

   AX = 00CBh
   ES:BX -> variable pointer record (see #3180)
   CX = size of source bitmap in bytes

Return: result buffer filled

Note:  the FGDRIVER functions are rearranged with each major release, but
     their parameters do not change (see #3145)

See Also: AX=0083h

Format of FGDRIVER UNPACK variable pointer record:
Offset Size    Description (Table 3180)
 00h   WORD    segment of source bitmap
 02h   WORD    offset of source bitmap
 04h   WORD    segment of buffer for resulting bitmap
 06h   WORD    offset of buffer for resulting bitmap