I thought the FAA had special hybrid 6 computer systems, 3 x 2 way MPs? Interesting!
Dan Sent from my iPad > On Dec 22, 2013, at 3:11 PM, DASDBILL2 <[email protected]> wrote: > > I seem to remember working with some S/360 Model 55 MPs at an FAA Air Route > Traffic Control Center in 1978. They must have had smaller maximum real > memories and run slower than model 65MPs, but had the same RPQ extra > instructions to enable multi-processing. > Bill Fairchild > > ----- Original Message ----- > >> From: "Anne & Lynn Wheeler" <[email protected]> >> lots of problems with 360/65 mp which did have shared memory ... but no >> shared i/o ... dedicated processor channels simulated multiprocessor i/o >> by connecting processor-specific channels to different "tails" on >> multi-tail control unit. also 360/65 os/360 mp support used test&set for >> very gross level spin-lock (significantly exacerbating any recovery >> scenarios). at the time, ibm definition of mp was that the system could >> be (manually) partitioned into two independently running systems (when >> 3081 came out the new term was dyadic, since it was not possible to run >> the two processors independently) > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
