Ok, I now got it. Yes, you are right about too much global data in SIMH that is not good design for multiprocessors.
Tim -----Original Message----- From: Simh <simh-boun...@trailing-edge.com> On Behalf Of Johnny Billquist Sent: Saturday, April 6, 2019 6:43 PM To: simh@trailing-edge.com Subject: Re: [Simh] VAX 8200/8250 On 2019-04-06 22:28, Timothy Stark wrote: > I was surprised to see that! Very good news!! Good job! I will try that > soon. > > For 8250/8350, you need two MP processors. Does vax820 emulate two MP > processors like VAX-11/782? The 8250 multiprocessor uses VAXBI for interconnection, and it's a symmetric multiprocessor system. The VAX-11/782 was a very different beast with shared memory, and asymmetric multiprocessing. But as far as I know, simh supports neither, as it don't really manage multiple processors that easily in general. Too much global data, if I remember right. Johnny > > Tim > > -----Original Message----- > From: Simh <simh-boun...@trailing-edge.com> On Behalf Of Matt Burke > Sent: Saturday, April 6, 2019 1:21 PM > To: Simh Trailing-Edge Mailing List <simh@trailing-edge.com> > Subject: [Simh] VAX 8200/8250 > > Here is a new simulator for the VAX 8200/8250 systems. Most of the key > features are there including the DWBUA BI-Unibus adapter which allows all the > existing Unibus devices to be used. The console RX50 is also implemented. > > The console processor is not simulated so it uses the same VMB trick as the > VAX-11/7xx simulators i.e. you boot directly from a device "boot rq0" rather > than "boot cpu". > > You can get the code from: > > https://github.com/9track/simh/tree/vax820 > > And Windows executable from: > > http://www.9track.net/simh/vax820 > > Please try it out and let me know how you get on. > > > Matt > _______________________________________________ > Simh mailing list > Simh@trailing-edge.com > http://mailman.trailing-edge.com/mailman/listinfo/simh > > _______________________________________________ > Simh mailing list > Simh@trailing-edge.com > http://mailman.trailing-edge.com/mailman/listinfo/simh > -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: b...@softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol _______________________________________________ Simh mailing list Simh@trailing-edge.com http://mailman.trailing-edge.com/mailman/listinfo/simh _______________________________________________ Simh mailing list Simh@trailing-edge.com http://mailman.trailing-edge.com/mailman/listinfo/simh