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Best Motherboard for a 5162/ XT-286

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    Best Motherboard for a 5162/ XT-286

    So, as Iíve mentioned, I have a 75% complete IBM XT 286, in great condition. However, before it came to me, someone upgraded the motherboard with a random 486sx motherboard. Because of that, and the fact that the market for original motherboards seems to be very tight, Iím looking for a reasonable replacement that is period-appropriate.

    My first hope was that I could squeeze one of the later AT motherboards in, but they are 3/4Ē too long, on the long axis. Does anyone else have a suggestion for good 286 boards that would have been likely candidates for XT upgrades, or replacements for XT 286es, with failed motherboards?

    I have the following cards installed:

    Generic Cirrus Logic VGA (Iím on the lookout for a good EGA card)
    Sound Blaster 2.0
    Ultrastor 14F SCSI/floppy controller
    NE2000 generic network card
    Generic serial/parallel card

    As far as drives go, I have:

    Black 1.44mb 3.5Ē (Iím on the lookout for the correct blue-buttoned IBM floppy)
    IBM 360k 5.25Ē
    1GB full-height Seagate SCSI-1

    Currently, I have a late headland chipset 286/20 motherboard installed, but that doesnít seem appropriate, as it would have come out quite a few years after the XT 286. It also looks quite silly in the case, as itís a tiny board that isnít much bigger than the 6x16 bit ISA slots that it supports.

    Any suggestions are welcome!
    - Alex

    #2
    Is there any reason you haven't considered an IBM AT or IBM XT-286 motherboard further? I don't think the market for them is that tight...?

    Something "period appropriate" for an XT-286 or AT would be something like a 20 or 25 MHz 386 upgrade, which is something people actually did (you could browse 1990-ish issues of Computer Shopper to get some ideas). But since the XT-286 has a recognizable brand and historical relevancy, I would try hard to find an IBM AT motherboard to put in it. (I understand an XT-286 board is harder to find.) You might be able to salvage working boards from "doesn't do anything when you turn it on" IBM ATs currently sold on ebay.

    Originally posted by ajacocks View Post
    Currently, I have a late headland chipset 286/20 motherboard installed, but that doesn’t seem appropriate, as it would have come out quite a few years after the XT 286. It also looks quite silly in the case, as it’s a tiny board that isn’t much bigger than the 6x16 bit ISA slots that it supports.
    It's actually somewhat appropriate, although most people did a motherboard swap to jump from 286 to 386.
    Offering a bounty for:
    - A working Sanyo MBC-775 or Logabax 1600
    - Music Construction Set, IBM Music Feature edition (has red sticker on front stating IBM Music Feature)

    Comment


      #3
      Finding a 5162 motherboard is indeed quite difficult, I looked for one for damn near 10 years before finally restoring mine.

      The 5170 board will not fit

      Comment


        #4
        Trixter,

        An AT board was my first choice. I have a nice 8 MHz one, but it’s too long, as I mentioned, unfortunately.

        - Alex

        Comment


          #5
          How much is too much ?

          There is a 5162 motherboard for sale for £180 on ebay, which is twice what my 5160 system cost, but it would make it complete.

          https://www.ebay.co.uk/itm/IBM-5162-....c100667.m2042

          Or an 89 286 board that looks about the size and is only 3 years younger than the release date of the 5162

          https://www.ebay.co.uk/itm/286-Mothe....c100667.m2042
          Current fleet
          TRS80 Model 4 - BBC B - Tatung Einstein - PCW9512 - PET 3032 - C64 - ZX81 - Spectrum 48K - Amiga A500 - Apple II europlus - Apple iMAC G3. Sharp MZ-80K. - IBM 5160 XT - Multibus 286/10 - Micro PDP 11/73 - Rainbow PC100A - MicroVax II - MicroVAX 3100, 3300, VAX 4000 VLC & 4000 Model 96 - AlphaStation 225 Apricot PC - Apple Performa 6200 - Apple Mac IIcx - Osborne 1 - ACT Sirius 1

          Comment


            #6
            Originally posted by Gary C View Post
            How much is too much ?

            There is a 5162 motherboard for sale for £180 on ebay, which is twice what my 5160 system cost, but it would make it complete.

            https://www.ebay.co.uk/itm/IBM-5162-....c100667.m2042

            Or an 89 286 board that looks about the size and is only 3 years younger than the release date of the 5162

            https://www.ebay.co.uk/itm/286-Mothe....c100667.m2042
            for me, I was capping my spend at $100US

            Comment


              #7
              Second board is $64 USD

              Though it is an AMD chip
              Current fleet
              TRS80 Model 4 - BBC B - Tatung Einstein - PCW9512 - PET 3032 - C64 - ZX81 - Spectrum 48K - Amiga A500 - Apple II europlus - Apple iMAC G3. Sharp MZ-80K. - IBM 5160 XT - Multibus 286/10 - Micro PDP 11/73 - Rainbow PC100A - MicroVax II - MicroVAX 3100, 3300, VAX 4000 VLC & 4000 Model 96 - AlphaStation 225 Apricot PC - Apple Performa 6200 - Apple Mac IIcx - Osborne 1 - ACT Sirius 1

              Comment


                #8
                $100 was my ceiling for an authentic IBM, a clone would only be worth half that at best IMO

                Comment


                  #9
                  A real one for sale here

                  https://harddiskdirect.co.uk/62x1025...CABEgIvbfD_BwE
                  Current fleet
                  TRS80 Model 4 - BBC B - Tatung Einstein - PCW9512 - PET 3032 - C64 - ZX81 - Spectrum 48K - Amiga A500 - Apple II europlus - Apple iMAC G3. Sharp MZ-80K. - IBM 5160 XT - Multibus 286/10 - Micro PDP 11/73 - Rainbow PC100A - MicroVax II - MicroVAX 3100, 3300, VAX 4000 VLC & 4000 Model 96 - AlphaStation 225 Apricot PC - Apple Performa 6200 - Apple Mac IIcx - Osborne 1 - ACT Sirius 1

                  Comment


                    #10
                    I would go for a NEAT chipset motherboard. https://en.wikipedia.org/wiki/NEAT_chipset
                    It makes it really easy to use UMB and EMS.
                    https://retrocomputing.stackexchange...s-support-umbs
                    Last edited by freakedenough; October 5, 2020, 03:24 AM.

                    First own PC in 2003: AMD K6-2 500MHz, 320MB RAM, 40GB IBM HDD, 50x CD-ROM, 8x4x24 CD/RW, 100MBit LAN, 32MB ATi Rage 128 Pro, Windows XP

                    Comment


                      #11
                      Originally posted by Gary C View Post
                      I certainly hope the image does in fact differ from the actual product, because that's a picture of a 5150 board

                      Comment


                        #12
                        Originally posted by Gary C View Post
                        Thank you Gary, purchased!

                        - Alex

                        Comment


                          #13
                          Originally posted by maxtherabbit View Post
                          I certainly hope the image does in fact differ from the actual product, because that's a picture of a 5150 board
                          Oh, I hope it does too.

                          Description is correct though.
                          Current fleet
                          TRS80 Model 4 - BBC B - Tatung Einstein - PCW9512 - PET 3032 - C64 - ZX81 - Spectrum 48K - Amiga A500 - Apple II europlus - Apple iMAC G3. Sharp MZ-80K. - IBM 5160 XT - Multibus 286/10 - Micro PDP 11/73 - Rainbow PC100A - MicroVax II - MicroVAX 3100, 3300, VAX 4000 VLC & 4000 Model 96 - AlphaStation 225 Apricot PC - Apple Performa 6200 - Apple Mac IIcx - Osborne 1 - ACT Sirius 1

                          Comment


                            #14
                            Originally posted by ajacocks View Post
                            Thank you Gary, purchased!

                            - Alex
                            Was the board as advertised ?
                            Current fleet
                            TRS80 Model 4 - BBC B - Tatung Einstein - PCW9512 - PET 3032 - C64 - ZX81 - Spectrum 48K - Amiga A500 - Apple II europlus - Apple iMAC G3. Sharp MZ-80K. - IBM 5160 XT - Multibus 286/10 - Micro PDP 11/73 - Rainbow PC100A - MicroVax II - MicroVAX 3100, 3300, VAX 4000 VLC & 4000 Model 96 - AlphaStation 225 Apricot PC - Apple Performa 6200 - Apple Mac IIcx - Osborne 1 - ACT Sirius 1

                            Comment


                              #15
                              I haven’t received it, yet. I’ll post here when I do.

                              - Alex

                              Comment

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