!DOSmount is a DOS drive mounter. It allows you to view DOS format SCSI and other devices from the RISCOS desktop by presenting the whole device to DOSFS (the RISCOS module that reads DOS floppies and partition files). This is done viaa thing called RawFs, which can present any filing system at a very lowlevel. It can only handle up to 512k partitions.
It will never be made RO 5.x compaible.