In <CA+Myz1Udc_9ddoR=6LpXkA=9jak+xap2fya9hccvpwkmzk0...@mail.gmail.com>, on 11/18/2012 at 11:18 PM, Quasar Chunawala <[email protected]> said:
>*Hi Mike and Schmuel - * That's Shmuel! >GC27-6939-10_MFT_Guide_R21.7_Mar72 IBM System/3S0 Operating System MVT Guide OS Release 21, GC28-6720-4, would be more relevant to TSO; you can find it and several others on bitsavers. >http://www.mainframes360.com/2012/11/tso-and-ispf.html. The first thing I see is that much of the material, some incorrect, seems to come from wikipedia. I would advise looking at original sources as much as possible. Time-sharing need not involve time slicing and that time slicing can be used even without time sharing. IBM announced SSS, MSS and MPS as options early on. Do you have any documentation suggesting that it was not originally planned that way? IBM issued sevaral releases of TSS/360 and even had a PRPQ for TSS/370 before they cancelled it. TSS performance was considerably better by then. TSO sessions usually involve I/O and contention for resources; the user[1] surrenders control of the CPU when he is waiting and some other session[2], or a batch job, can use it. When contention or a wait is resolved, the session becomes eligible to be dispatched. I've never seen a system running TSO where there were as many processors as there were TSO regions. Interactive System Productivity Facility came late in the game; it would be better to refer to Structured Programming Facility and replacements. Also, an important part of ISPF is the ability to write your own panel-based applications. ISPF users quickly learn to chain options, e.g., at the main menu they will type "3.4" ENTER rather than "3" ENTER "4" ENTER. The references should include links and "IBM Manuals on MFT" should be replaced by a list of relevant MVT manuals, with links. [1] Actually, the specific task, but to a first approximation only one task in the session will be ready. [2] This is handled the same way as for batch jobs. -- Shmuel (Seymour J.) Metz, SysProg and JOAT Atid/2 <http://patriot.net/~shmuel> We don't care. We don't have to care, we're Congress. (S877: The Shut up and Eat Your spam act of 2003) ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
