Multiprocessing support earlier than TSO? It was before my time, but I read and heard plenty about "MVT/MP65", which predates TSO's rollout by a couple years, I think.
MP65 had challenges: 'sympathy sickness" where a CPU problem took down both CPUs in the complex, kinda sorta anti-redundancy, if you will. Cured by MVS Alternate CPU recovery. Serialization? Not so good with TEST and SET, I think it was called. Much better with Compare and Swap, etc. Enough for now. Dan Skwire Sent from my iPad > On Dec 22, 2013, at 11:58 AM, Steve Comstock <[email protected]> wrote: > >> On 12/22/2013 9:56 AM, Paul Gilmartin wrote: >>> On Sun, 22 Dec 2013 10:01:33 -0600, Andreas F. Geissbuehler wrote: >>> >>> Straight from a slowly fading memory... >>> In the early '70 IBM released a new and improved CRJE called TSO, a TCAM >>> application program. I believe it was part of IBM's "worst-ever" release, >>> OS/MVT Release 19. TSO brought us Sub-Tasking and related macros ATTACH and >>> DETACH using a newly expanded control block called TCB mapped by IKJTCB >>> among many other IKJ's of TSO. ... >> ATTACH/DETACH appeared contemporaneously with TSO!? I'm astonished! >> I'd have guessed they were much older, perhaps even aboriginal OS/360. >> Was there no multiprocessing mechanism older than TSO? RYO, I suppose. >> That's what I understand JES and CICS (others?) do. >> >> -- gil >> >> ---------------------------------------------------------------------- >> For IBM-MAIN subscribe / signoff / archive access instructions, >> send email to [email protected] with the message: INFO IBM-MAIN > > That can't be right. MVT had ATTACH/DETACH. > > -- > > Kind regards, > > -Steve Comstock > The Trainer's Friend, Inc. > > 303-355-2752 > http://www.trainersfriend.com > > * We are going out of business effective 30 December, 2013 > > * To purchase a set of our training materials at terrific prices, > check out our Going Out Of Business Sale: > > http://www.trainersfriend.com/SpecialSale > > ---------------------------------------------------------------------- > 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
