Xref: utzoo comp.unix.questions:24114 comp.unix.i386:7278 Path: utzoo!attcan!uunet!tut.cis.ohio-state.edu!mailrus!iuvax!maytag!focsys!larry From: larry@focsys.uucp (Larry Williamson) Newsgroups: comp.unix.questions,comp.unix.i386 Subject: Re: Real time unix Message-ID: Date: 27 Jul 90 19:03:10 GMT References: <196@norisc.UUCP> Sender: larry@focsys.uucp (Larry Williamson) Organization: Focus Automation Systems Inc. Waterloo, Ontario. Lines: 35 In-Reply-To: xklaus@norisc.UUCP's message of 27 Jul 90 12:19:19 GMT An excellent package is produced by VenturCom in the US. They use Interactive's Unix (2.0.2) as the basis and then add a driver and modify a couple of kernel functions to provide the real time response. They call their system RTX (They may have recently started to call it Venix/386, but I'm not sure). Some additional features they have included are: . millisecond timers . direct physical memory access from user processes . direct io port access from user processes . Very fast interrupt response time . Memory locking . Real time synchronization . Asynchronous I/O . High performance file system We have had no compatiblity problems with any application we've run with this system. It is as pure Interactive Unix System V 3.2 as you can get. They have some excellent documentation on performance metrics for their system. Price is pretty good too. I don't know what it will cost you in Europe. I normally talk with Kara Phelan. VenturCom Cambridge, Mass. (617) 661-1230 -larry