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Juko ST 8088/V20 Motherboard Manual and Software

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    Juko ST 8088/V20 Motherboard Manual and Software

    Hi guys. Does anybody have or know where is it possible to download the manual and the software for a 8088/V20 XT Juko ST motherboard? I've found just a jumpers/switches and memory configuration guide (http://stason.org/TULARC/pc/motherbo...XT-BXM-12.html).

    Thank you!

    #2
    What software are you expecting to find? Most XT clone motherboards didn't come with any, because there is nothing needing software to enable. Also I'm not sure what is in the manual you would need, beyond the jumpers/switches and memory configuration, and maybe the keyboard command to take it in and out of turbo mode (ctrl-alt-plus and ctrl-alt-minus, most frequently).

    Comment


      #3
      I have a Juko ST OEM board (Unique brand name) of which I have the manual.

      But, as stated already, there isn't much more in there that you won't find on the link (to Total Hardware 99) already posted.

      The Juko ST boards did come with some software. One which was a tsr that enables software mode turbo functionality and the other a RAMDrive driver but, for that you need to install 1 MB of RAM on the board.

      I can upload the utilities if you are looking for them.
      Just note that my board only supports the NEC V20. I know of certain variants that supported both an 8088 & an NEC V20.

      Comment


        #4
        There's also a driver which allows to use the 384 KB of extended memory as EMS, but not very useful, as it places EMS page frame below the 640 KB address, leaving only 576 KB of conventional memory.

        Comment


          #5
          Originally posted by jesolo View Post
          I have a Juko ST OEM board (Unique brand name) of which I have the manual.

          But, as stated already, there isn't much more in there that you won't find on the link (to Total Hardware 99) already posted.

          The Juko ST boards did come with some software. One which was a tsr that enables software mode turbo functionality and the other a RAMDrive driver but, for that you need to install 1 MB of RAM on the board.

          I can upload the utilities if you are looking for them.
          Just note that my board only supports the NEC V20. I know of certain variants that supported both an 8088 & an NEC V20.
          That's exactly what I'm looking for. I would appreciate it very much. Thank you.

          Comment


            #6
            Originally posted by jesolo View Post
            I can upload the utilities if you are looking for them.
            Please do.

            Just note that my board only supports the NEC V20. I know of certain variants that supported both an 8088 & an NEC V20.
            I really wonder why a board that supports the NEC V20 cannot support the 8088. I can imagine that the BIOS can specifically test if a V20 is present and will shut down if not. But replacing the BIOS as well should fix that.
            With kind regards / met vriendelijke groet, Ruud Baltissen

            www.baltissen.org

            Comment


              #7
              Originally posted by Ruud View Post
              I really wonder why a board that supports the NEC V20 cannot support the 8088.
              8088 requires CLK signal with 33% duty cycle, which is obtained by dividing the XTAL frequency by 3.
              V20 can work with CLK duty cycle of 33% or 50%, and the latter is obtained by dividing the XTAL by 2.

              Those "Super Turbo" boards with V20 @ 12 MHz typically use a 24 MHz XTAL - so you can't simply replace the V20 with an 8088 here.
              But it may be possible to jumper the board for the /3 divisor.

              Comment


                #8
                Attached the utilities that I received with my Unique (Juko ST clone) motherboard.
                Attached Files

                Comment


                  #9
                  Originally posted by jesolo View Post
                  Attached the utilities that I received with my Unique (Juko ST clone) motherboard.
                  Thank you very much! Is it possible you to scan the manual and publish here too?

                  Comment


                    #10
                    UX Turbo (Juko ST Clone) Mainboard manual

                    Tried uploading a pdf scanned copy. Unfortunately, there seems to be a forum limit of 48.8 KB for pdf files, which seems a bit strange.
                    I'd be happy to upload this, if someone has any suggestions on how I can upload a 4.32 MB pdf file.

                    Comment


                      #11
                      Originally posted by jesolo View Post
                      Tried uploading a pdf scanned copy. Unfortunately, there seems to be a forum limit of 48.8 KB for pdf files, which seems a bit strange.
                      I'd be happy to upload this, if someone has any suggestions on how I can upload a 4.32 MB pdf file.
                      If you email it to me (I have PM'ed to you my email address), then I will host the document at [here].

                      Comment


                        #12
                        I've e-mailed you the manual.
                        Thank you for willing to host.

                        Comment


                          #13
                          Originally posted by jesolo View Post
                          I've e-mailed you the manual.
                          Now hosted at the 'Unique' section of [here].

                          Originally posted by jesolo View Post
                          Thank you for willing to host.
                          And we thank you for making the document available.

                          Comment


                            #14
                            I have this same board abut it is missing the BIOS chips. I have an EPROM burner and EPROMS but I need the file to load onto the EPROM. Would anyone happen to have these files and able to upload them? The board is marked with 2764 and 27256 where the BIOS goes. Not sure if there are two different BIOS availalbe or you need to populate both.

                            Thanks

                            Comment


                              #15
                              Originally posted by rlumsden View Post
                              I have this same board abut it is missing the BIOS chips. I have an EPROM burner and EPROMS but I need the file to load onto the EPROM. Would anyone happen to have these files and able to upload them? The board is marked with 2764 and 27256 where the BIOS goes. Not sure if there are two different BIOS availalbe or you need to populate both.
                              Thanks
                              Welcome to these forums.

                              Regarding the motherboard that member jesolo wrote of, there may be two versions of that:
                              * 640 KB of motherboard RAM
                              * 1 MB of motherboard RAM

                              I have the 640 KB version, and the motherboard BIOS for that is at [here], in the "Motherboard: Unbranded XT clone (CPU: V20 @ 12 MHz)" entry.

                              Member Ruud has the 1 MB version, and the photo at [here] shows that motherboard's BIOS to be a Juko 2.30 one. Pointers to that BIOS are at [here].

                              Comment

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