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IBM DOS v5...

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    #16
    Can't say for sure. I can only guess that they are using IO.SYS & MSDOS.SYS as they appear to be manufactured by Microsoft.
    Surely not everyone was Kung-Fu fighting

    Comment


      #17
      Originally posted by mbbrutman View Post
      I'm a big fan of IBM DOS 5. Unfortunately, all of my copies seem to be on 5.25" diskettes, not 3.5s.
      Was IBM DOS 5 even available on 5.25" diskettes? It would be logical if it wasn't, after all this was in the PS/2 era, when IBM was pushing 3.5" drivers pretty hard.
      Yes, I know about 5.25" variants of MS-DOS 5, but I've never seen IBM DOS 5 in any other form than 3.5" 720KB.

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        #18
        Marrr:

        Check the labels on the two 3.5 inch floppies above. They don't say "PC-DOS". This particular set was made by Microsoft. (You have to almost stand on your ear to see it, but they do say "Copyright Microsoft 1991". These disks seem to have been licensed to IBM, however. As to your question, who knows? I would bet yes, they were available. At that time almost all popular softrware was available in the 5.25 inch format. As a mater of fact, I remember purchasing a 5.25 inch PC-DOS boxed edition back in early 90's, when a friend asked me put a pc together. Do you remember that there was a period when some boxed software came with both, the 3.5 and 5.25 variety?

        Interesting topic.
        Surely not everyone was Kung-Fu fighting

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          #19
          I'm not sure about 5.0x, but I do know that IBM PC DOS 6.x came on 3.5" 1.44 MB disks and included a coupon to get a free set of 3.5" 720K installation disks. 5.25" disks of either density did not appear to be available from IBM.

          MS-DOS 6.x came on 3.5" 1.44MB disks and included a coupon to get a free set of either 5.25" 360K or 3.5" 720K installation disks. I actually used this coupon once and got myself a free set of MS-DOS 6.22 on about twelve or thirteen 360K floppies (yes, including all the Windows utilities which likely wouldn't even be applicable to a machine needing 360K floppies).

          And finally, IBM's PC DOS 7.0 and 2000 came on either 3.5" 1.44MB floppies or a CD-ROM (!) and did not include any coupon for a set of 720K floppies.

          Comment


            #20
            Originally posted by Agent Orange View Post
            Marrr:

            Check the labels on the two 3.5 inch floppies above. They don't say "PC-DOS". This particular set was made by Microsoft. (You have to almost stand on your ear to see it, but they do say "Copyright Microsoft 1991". These disks seem to have been licensed to IBM, however. As to your question, who knows? I would bet yes, they were available. At that time almost all popular softrware was available in the 5.25 inch format. As a mater of fact, I remember purchasing a 5.25 inch PC-DOS boxed edition back in early 90's, when a friend asked me put a pc together. Do you remember that there was a period when some boxed software came with both, the 3.5 and 5.25 variety?
            Well, you just forced me to dig out my IBM DOS 5.0 box, and it was painful as I'm getting ready to move and almost all of my vintage stuff is temporarily very hard to access
            Anyway, yes, my IBM DOS 5.0 disks also have both "Copyright International Business Machines" and "Copyright Microsoft". And no wonder: for all those years DOS was mostly being developed by Microsoft, IBM only did minor modifications.
            And, as I already mentioned, there was no PC DOS 5. There was PC DOS 3.30, but the following versions of this product were named IBM DOS 4 and IBM DOS 5, the name "PC DOS" was reintroduced with version 6.

            And yes, I very well remember the 5.25"->3.5" transition. Random fact: here in Poland in early 1990s genuine IBMs were pretty rare, the market was totally dominated by clones, 5.25" diskettes were still more popular, so local OEMs (eg. Optimus and Protech) were selling (bundled with hardware) their MS-DOS 5 versions in 2 x 5.25" 1.2MB variant.
            But it's also fact that at the same time all new IBM PCs^H^H^H PS/2s by default only had 3.5" drives, and IBM DOS was intended primarily for IBM hardware, so why should they provide 5.25" option?

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              #21
              I knew someone who had an IBM PC/XT in the early 1990s, and I'm almost certain he ran IBM DOS 5 on it at the end. It's been a number of years now, but I distinctly remember seeing those 360K 5.25" IBM DOS 5 floppies. I even think I was the one who installed DOS 5 on it for him. I do know he didn't have a 3.5" drive in that machine.

              They may not have been easy to find, but it makes sense that IBM would have wanted to sell DOS upgrades to owners of those older machines that sported 5.25" drives from the factory.
              my blog: http://dfarq.homeip.net
              I wanna live where it's always Saturday. --Guadalcanal Diary

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                #22
                Thanks Agent Orange!

                I will fiddle with the files and see what I can do.

                Cheers!
                There are doorways I haven't opened and windows I've yet to look through, going forward may not be the answer, maybe I should go back!

                Looking for:
                Commodore 64/128 or Atari stuff. Any XT/AT/286 parts or complete machines.
                South Africa Please.

                Currently Own:
                Vintage
                Modified IBM 5155, Stock IBM 5160, Commodore64 with 1541 & C2N
                Main Rig
                Core i5 750, 4GB RAM, HD5770 1GB, 1.4TB storage

                Comment


                  #23
                  hmm not sure if this is what ur looking for the system it belonged to is long gone

                  Pegcity bits the home of praire bits and bytes a heritage lost yet not
                  Heathkit h89 h77 h11 h10 with some extra bits
                  Osborn 1 x2
                  pdp8a with asr33 and documentation and software
                  GE workmaster with series six PLC and ibm p70 (same as a ge workmaster 2)
                  Commodore PC-10 II and other stuff

                  Comment

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