RSX-11

mentec-inc used to be the place for the commercial stuff, but it seems to be no longer around. My question, however, was regarding the non-commercial PDP-11 stuff. At this point, I'm not interested in the commercial stuff- it just isn't worth it. (before you grab the torches and pitchforks I don't find Windows "worth it" enough to walk across campus and pick up the all-but-free disks either). I was looking into emulators (never touched the VAX's little brother or O/S SW yet), and came across some disk images with the following licensing: "Whereas, MENTEC owns the rights to the following PDP-11 Operating Systems and associated layered products (RT-11 V5.3 or prior, RSTS/E V9.6 or prior, RSX-11M V4.3 or prior, RSX-11M PLUS V3.0 or prior) (SOFTWARE TECHNOLOGY) and is prepared to grant a non-exclusive license to use such SOFTWARE TECHNOLOGY for personal, non-commercial purposes;" and "SOFTWARE TECHNOLOGY shall mean the binary versions of the PDP-11 Operating Systems (RT-11 V5.3 or prior, RSTS/E V9.6 or prior, RSX-11M V4.3 or prior, RSX-11M PLUS V3.0 or prior), and associated utilities and layered products that run on PDP-11 computers. " but somewhat cryptically also "EMULATOR shall mean software owned by Digital Equipment Corporation that emulates the operation of a PDP-11 processor and allows PDP-11 programs and operating systems to run on non-PDP-11 systems. 2 LICENSE GRANT MENTEC grants to CUSTOMER a worldwide, non-exclusive, royalty-free license under MENTEC's INTELLECTUAL PROPERTY RIGHTS to use and copy the SOFTWARE TECHNOLOGY solely for personal, non-commercial uses in conjunction with the EMULATOR." So, in short, is this only valid for emulators in which DEC or it's successors in interest (HP?) own the copyright, or is it only valid for systems where DEC or (...) hold RTU licenses for a PDP-11 emulator on? If the prior, what is the connection to SIMH? If it is valid for currently obtainable emulators and (as it seems to at face value) include RSX-11, why no RSX-11 images? I suppose RSTS/E is the easy way out, (provided licensing is good), but RSX-11 has the advantages of some commonality with VMS (DCL).