Need information on DG RDOS "DUMP" format

[Bob Lewis]

I have a tape produced by a Data General machine running RDOS.  The tape was
made by the standard DG "DUMP" program.  The tape seems to be a concatenation
of individual files, but I can't determine the individual format of each
file.  There is, of course, "NUXI" scrambling, but what I'm uncertain about
is where the timestamp and byte (or whatever) counts are supposed to be in
the first place.

Can anyone out there explain the format or (hope hope) provide or point to
an existing conversion program?  Replies by net mail, please.

	- Bob Lewis
	  ...!tektronix!teklds!bobl