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XT/370 or 3270 PC

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    XT/370 or 3270 PC

    I recently acquired the 1984 Special Issue for IBM Computers Byte Magazine, and in this issue it talks about all of the available IBM personal computers at that time including the XT/370 and the 3270 PC. I know these are geared more for high end because of their attachment capabilities to mainframes and one of them can even run mainframe instructions locally. Does anyone here on the forum have either of these?

    Thanks,
    Daniel
    Daniel P. Cayea - The Lyon Mountain Company - Plattsburgh, New York 12901
    Vintage Equipment: IBM 5150 * IBM 5161 * ThinkPad 770ED
    Modern Equipment: MacBook Pro 13 * Alienware M15R3

    #2
    Hi Daniel,
    I used to have an XT/370 many years ago. It was discarded by a software development company and I got it along with several other neat machines (IBM RT, DecStation, Data General Aviion, etc...)
    After holding on to it for almost 5 years it ended up in the trash in the late 90's (big mistake on my part). The computer ran just fine and was hardware complete and it ran DOS and the IBM VM mainframe OS.
    It was a neat curio but nothing else. Would make for a nice collectors item today.

    Comment


      #3
      Early in my career I was a technical writer for MVS + JES2 and JES3 (HASP and ASP . In order to learn the various facilities (writing exits, doing diagnosis, messages, init & tuning, conversion notebook etc) I installed a S/370 emulator in my PC/XT so I could run the OS and subsystems. I am not sure if the XT/370 wasn't just an XT with the same emulator adapter, or had more to it than that. I do know you can go on eBay and someone there offers a CD with all of the various OS's (MVS, JES2/3, TSO, RACF, VM etc) pre-configured to run on a system with the s/370 emulator (if you have one) at a pretty decent price for just the CD.

      Regards,
      Mike

      Comment


        #4
        IBM offered the cards to upgrade a regular XT also. These same cards also made it to an AT/370 (I've never seen one of these though).
        The excellent Hercules emulator will run almost almost all the S/370, S/390 and Z-series OSes. If you don't want to buy a pre-made CD like Mike mentioned you can download yourself:
        Emulator here:
        http://www.hercules-390.eu/

        Legacy mainframe OSes here (like MVS, VM, etc...)
        http://www.cbttape.org/

        BTW, if you can't get this stuff running in the emulator first don't even bother with a "real mainframe" like the XT/370. It will be much more of a pain in the butt with the real hardware....
        Last edited by amadama; May 5, 2015, 01:45 PM.

        Comment


          #5
          Sadly Hercules won't boot the CMS from the XT or AT/370. However it will run VM370/R6 much quicker, but no goodies like real REXX and XEDIT...
          Dave
          G4UGM

          Looking for Analog Computers, Drum Plotters, and Graphics Terminals.

          Comment


            #6
            Originally posted by amadama View Post
            Hi Daniel,
            I used to have an XT/370 many years ago. It was discarded by a software development company and I got it along with several other neat machines (IBM RT, DecStation, Data General Aviion, etc...)
            After holding on to it for almost 5 years it ended up in the trash in the late 90's (big mistake on my part). The computer ran just fine and was hardware complete and it ran DOS and the IBM VM mainframe OS.
            It was a neat curio but nothing else. Would make for a nice collectors item today.
            I think it would be neat to have one, maybe even with the expansion unit, just an idea. Will be interesting to see if someone in the community has it.
            Daniel P. Cayea - The Lyon Mountain Company - Plattsburgh, New York 12901
            Vintage Equipment: IBM 5150 * IBM 5161 * ThinkPad 770ED
            Modern Equipment: MacBook Pro 13 * Alienware M15R3

            Comment


              #7
              Originally posted by g4ugm View Post
              Sadly Hercules won't boot the CMS from the XT or AT/370. However it will run VM370/R6 much quicker, but no goodies like real REXX and XEDIT...
              The "bleeding edge" version of Hercules has REXX support:
              http://hercules-390.github.io/html/

              Comment


                #8
                Originally posted by lyonadmiral View Post
                I think it would be neat to have one, maybe even with the expansion unit, just an idea. Will be interesting to see if someone in the community has it.
                Yikes, a kit sold recently for over $1100!:
                http://www.ebay.com/itm/IBM-Personal...p2047675.l2557

                Comment


                  #9
                  Originally posted by amadama View Post
                  Yikes, a kit sold recently for over $1100!:
                  http://www.ebay.com/itm/IBM-Personal...p2047675.l2557
                  WOW! Cha-Ching!
                  Daniel P. Cayea - The Lyon Mountain Company - Plattsburgh, New York 12901
                  Vintage Equipment: IBM 5150 * IBM 5161 * ThinkPad 770ED
                  Modern Equipment: MacBook Pro 13 * Alienware M15R3

                  Comment


                    #10
                    Dag, this whole thread has brought back Program Logic Manual PTSD! I need a diagnostic code - where's the Exit?

                    Comment


                      #11
                      I think bear has one. I've seen pictures of it at least sitting on a table running. As for the 3270 PC someone here sold most of the boardset a month ago and personally I have the keyboard and Y-cable but nobody that I am aware of has the special keyboard card that brought all the components together, or the monitor.
                      [Need something to waste time on? Click here to visit my YouTube channel CelGenStudios]
                      --------------------------------------------------------------------------------------------
                      [No time for videos? Click here to visit my Twitter feed @CelGenStudios]

                      = Excellent space heater

                      Comment


                        #12
                        My 3270 PC

                        Comment


                          #13
                          Originally posted by IBM_User View Post
                          Very nice. I wonder could you attach an Expansion Unit to it as well?
                          Daniel P. Cayea - The Lyon Mountain Company - Plattsburgh, New York 12901
                          Vintage Equipment: IBM 5150 * IBM 5161 * ThinkPad 770ED
                          Modern Equipment: MacBook Pro 13 * Alienware M15R3

                          Comment


                            #14
                            Its a "modern" REXX not the one that came with CMS and there is no XEDIT to integrate it with. Not at all like REXX and XEDIT on CMS...
                            Dave
                            G4UGM

                            Looking for Analog Computers, Drum Plotters, and Graphics Terminals.

                            Comment


                              #15
                              It's true that I have an XT/370, and some of the remains of an AT/370 (no /370 CPU alas). And a 5271. With the keyboard and monitor. And a 5273.

                              I am not sure why anybody would be disappointed that Hercules won't run the "special" CMS for this system, since it is in every respect a less functional equivalent of the exact same CMS you can already run on Hercules (it's cut down from... VM/SP R3 I believe). There are lots of things it can't do. You're not missing out on anything. There's no reason to want it.

                              Yes, you can attach a 5161 expansion unit to any of them. I use one with my XT/370. It's the only way IBM supported attaching two hard drives to an XT.

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