Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!wuarchive!decwrl!bacchus.pa.dec.com!shlump.nac.dec.com!alien.enet.dec.com!mcculley From: mcculley@alien.enet.dec.com Newsgroups: comp.realtime Subject: Re: Summary of Real-Time Operating Systems Message-ID: <14069@shlump.nac.dec.com> Date: 31 Jul 90 00:59:34 GMT Sender: newsdaemon@shlump.nac.dec.com Organization: Digital Equipment Corporation Lines: 31 In article , peter@ficc.ferranti.com (Peter da Silva) writes... >Hey, if you're going to include HP's RTE, you need to add DEC's RT-11 and >RSX (small and big real-time for the PDP-11). >-- >Peter da Silva. `-_-' >+1 713 274 5180. 'U` > Glad somebody remembers us! Both RT-11 and the RSX family are still under active development at the present time. RSX is now actually five (or maybe even six) specific products. There's RSX-11S, a relatively small runtime system (primarily downline loaded for execute-only network targets); RSX-11M, the full-function system corresponding to -11S; RSX-11M-PLUS, optimized for larger PDP-11 configs; Micro/RSX, a user-friendly subset of M-PLUS; and CP/RSX, or Co-Processor/RSX, which runs on a KXJ-11 coprocessor in a VAX Q-bus backplane as a heterogenous multiprocessor system cooperating with a process running under VMS. There's also VAX-11/RSX, which supplies the Application Migration Executive to allow running an RSX application under VMS (primarily for porting existing RSX code to VAXen, also provides some development host facilities to target PDPs). Given that PDP-11s just celebrated their twentieth anniversary (by introducing new models) and that RSX and RT have both been around for most of that time, there's probably many more manyears of development in either than in almost any other entry on that list of realtime operating systems. PDP-11s forever! - Bruce McCulley PDP-11 Software Engineering Digital Equipment Corp.