userid - ssdrso
Ray Overby
Key Resources, Inc
Ensuring System Integrity for z/Series
(312) 574-0007
On 12/22/2013 4:56 PM, Daniel Skwire wrote:
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)
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