Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!clarkson!ub!planck!corsair!murphy From: murphy@corsair.uucp (Bill Murphy) Newsgroups: comp.realtime Subject: Re: RSX -- one of the best? Summary: sigh! Message-ID: <1991May16.140642.16263@planck.uucp> Date: 16 May 91 14:06:42 GMT References: Sender: news@planck.uucp (Usenet News) Reply-To: murphy%hercules@planck.UUCP (Bill Murphy) Distribution: comp.realtime Organization: Calspan Advanced Technology Center, Buffalo, NY Lines: 30 Nntp-Posting-Host: corsair In article kenw@skyler.arc.ab.ca (Ken Wallewein) writes: > > Back when I worked with RSX, my impression was that it was one of the >best real-time OSs available. It doesn't seem to have been mentioned here >much lately. Would anybody mind filling me in on why? > >/kenw I miss using RSX. I suppose it's demise can be attributed to two factors. Firstly, the performance PDP and LSI series of processors failed to keep up with the plethora of RISC processors which have come on the market in recent years. Why buy a PDP-11/84 with 0.8 VAX MIPS when you can buy a machine with 10 or 20 VAX MIPS for the same (or less) money? Secondly, the popularity of Unix as a general-purpose OS has lead to the development of several good Unix-like real-time OSs. We've been using VxWorks here for a couple of years. It took some getting used to (what, no AST's??), but I've grown to like it. It's simple, fast, and has some useful features not built into RSX (semaphores, RPCs, TCP/IP support). Bill -- ---- Bill Murphy, Calspan Corporation, Buffalo NY e-mail to: ...!{rutgers,uunet}!acsu.buffalo.edu!planck!murphy%hercules