Help reading a 9 track tape

Thanks for feedback and offers to assist. I received the tape from one of the maintainers of Schoonship at CERN, and it was probably made around 1978 at SLAC. For some background, Tini Veltman developed Schoonship in the 1960's at CERN on the CDC 6600. My understanding is that he more or less insisted on coding in assembly since he thought FORTRAN or other high level languages would just get in the way and slow things down. The code was maintained by Veltman and Strubbe well into the 1970's, but its future was held back by being so closely tied to CDC hardware. In the mid 1970's, Strubbe began a conversion of Schoonschip to IBM S/360 and S/370. It was sort of a curious technique, as far as I gathered. The idea was to first translate CDC COMPASS source to an intermediate PL/I like language. But then, instead of using the IBM PL/I compiler, a bunch of macros were developed to implement the PL/I like language in IBM assembly. This conversion was never fully completed for reasons unknown to me. Later on, when Tini joined the University of Michigan (that's where I'm located), he realized that Schoonschip needed to be updated. But the update was ... instead of CDC assembly he decided on m68k assembly. (At this time, in the early 1980's, C probably would have been the natural language of choice.) Moreover, he insisted on developing his own toolchain (assembler, linker, etc). This was before my time at Michigan, but basically he ported Schoonschip to just about all the m68k machines of that era (Sun, Atari, Amiga, Mac, NeXT, and others I am not familiar with). We have a pretty good collection of m68k code (http://www-personal.umich.edu/~williams/Vsys/index.html), but nothing earlier. Getting back to the tape, I'm pretty sure it has Strubbe's PL/I like code as it is an archive of the PL/I conversion. It may also have CDC source, but that is less obvious until we can see the contents. The CDC source is historically the most relevant, and I am hoping it exists on the tape. - jim