Knowing Atari, there tapes were most definitely written on a PDP-11
system.
==
They are discs, not tapes.
Atari switched from development on PDP-11's (an 11/60 that actually
was at Weird Stuff when they were next door..) to a VAX in the early
80's.
They are probably the RM05 packs from KIM::
--
I don't know about you, but I would be pretty surprised if Curt is
going to find someone willing to put an unknown 12 platter pack in
their RM05. I dont think Scopus or any of the disc inspection
companies are even around any more.
I have several dozen of those same vintage packs that I'm terrified
to even try to put in a drive (not for a VAX..)