Wasn't the VAX 11/782 and the Asymmetric model de-supported at some point during the life of VMS?
I seem to remember hearing (at a DECUS Symposium?) that existing 11/782 customers would have to separate them into two 11/780's and then cluster them to upgrade to the latest version of VMS. Dave -----Original Message----- From: Simh [mailto:[email protected]] On Behalf Of Johnny Billquist Sent: Wednesday, September 07, 2016 2:55 PM To: Ray Jewhurst Cc: [email protected] Subject: EXT :Re: [Simh] Pdp8 terminals Hi. On 2016-09-07 19:00, Ray Jewhurst wrote: > My apologies. To be honest I am very ignorant about of the science of > computers. I am disabled, cannot work but I am a total computer > history buff. I want to learn and know and experience as much as I can > and Simh is a major part of that. I want to help where I can so > please excuse my occasionally confusion. No worries. You never learn if you are afraid of making mistakes. However, if you are not rather experienced writing code, I think that implementing something like the VAX-11/782 might be quite a task... Not to mention that I don't know where you'd find a version of VMS that would support the machine. Maybe find something a little simpler to start with? Like the talk about expanding the PDP-8 to more generic support for devices than the current implementation. Johnny > > > On Sep 7, 2016 12:46 PM, "Johnny Billquist" <[email protected] > <mailto:[email protected]>> wrote: > > The 11/782 are no more asynchronous than any multiprocessor system. > > The A in ASMP stands for assymetric. As in, the second processor did > not run any kernel code, but is a slave processor to the primary > processor. It gets scheduled with user-land code to run, but any > trapping to the OS means it interrupts the main processor, who do > all the work. > > Johnny > > On 2016-09-07 18:23, Ray Jewhurst wrote: > > I think you are like I am. I would like to see every DEC simulator > possible. Right now I am doing some preliminary research into the > feasibility of a VAX 11/782 which is an asynchronous dual processor > 11/780. I will need help because I am not a real experienced coder. > > _______________________________________________ Simh mailing list [email protected] http://mailman.trailing-edge.com/mailman/listinfo/simh
