More likely it was a compiler/pcode interpreter
for a PDP10or 11, but I could be wrong. Year: 1969-70
http://www.threedee.com/jcm/psystem/
The ucsd p-system museum has a DCD6400 tape they
can read with the source to a ver early Pascal system.
Since Pascal was first written for the CDC 6600, the
DECtape mentioned above was likely an early port.
They give this link to a Jensen Wirth interpreter- but it's dead
ftp://ftp.threedee.com/usr/syndesis/p2.zip
Finding the files pasint.pas and pascom.pas on a PDP10 tape
from ETH Zurich would be starting point.