As I am in the middle of restoring some pdp-11/94's
the issue around how
RT11 and RSX could be made available is of much interest. If they have
not sold the rights and are not pursuing the business perhaps they could
help us poor pdp preservers.
I doubt they would release it for free, being a company and have paid
some money for these rights. But if you want to give a try, why not a formal
letter bringing the stuff up to the knowledge of mentec's owners/directors
explaining that there are a lot of hobbists looking to be right and this
even helps their sales with all the homebrew development it brings (an
example is spare time gizmos, who make hardware for PDP computers which keep
them working).