Yes. The reference to "PDP-10 memory management" is because apparently the KS11 did what the PDP-10 MMU did, i.e. divide the address space into two sections. (On the -10, one was for code, and one for data.) Alas, next to nothing is known of the KS11, although I've looked. There's a mention of it in "Odd Comments and Strange Doings in Unix": https://www.bell-labs.com/usr/dmr/www/odd.html but it doesn't say much. Noel