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ADB to PS/2 adapter creation - possible?

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    ADB to PS/2 adapter creation - possible?

    Hi!

    I own Mac SE with ADB keyboard and mouse.
    I have to my old computers connected single keyboard and sigle mouse, switching manually by switch-panel.
    I want to add there my Mac SE.
    Problem is that Macs have ADB connector and it's incompatible with PS/2.

    I was looking on pinout of ADB and PS/2, they're different, but here's Q:
    Is possible only simply connect correct wires together to make it work?
    I need not more than 1 buttoon mouse and standard keyboard (eject key is not req'd).

    If is it possible - how to connect it?

    Thank you for each help!
    Miro

    #2
    Sorry, ADB is very different from PS2. Both are serial interfaces, but there the similarity stops.

    There used to be some commercial PS2 to ADB converters, but I haven't kept up with this area.

    Comment


      #3
      There are KVM (keyboard, video, mouse) switches that support, among other things, mixed ADB and PS/2. All of the ones I've personally seen use a PS/2 mouse and keyboard for the console. I've got an old 8-port intended for servers that includes ADB, PS/2, and Sun connectors.
      Check out The Glitch Works | My Retro Projects | Vintage Computer Services | Glitch Works Tindie Store -- Vintage Computer Kits and More

      Comment


        #4
        I see only one choice - buy ADB2PS/2 or ADB2USB converter and connect it to main switchet.
        I saw with prices beginning at $28. This I don't understand - PS/2 to USB is for few dollars, but this is bit precious...
        Miro

        Comment


          #5
          Originally posted by MIRKOSOFT View Post
          I saw with prices beginning at $28. This I don't understand - PS/2 to USB is for few dollars, but this is bit precious...
          Low demand -- I'd imagine most people buying an ADB -> USB converter wanted it back when ADB stopped shipping on Apple computers, but they still had perfectly good keyboards/mice. PS/2 keyboards are far more common, and considering there are still modern motherboards with at least one PS/2 port (this machine is a quad-core AMD A8 and has one), I'd imagine they're still seeing a fair bit of use.
          Check out The Glitch Works | My Retro Projects | Vintage Computer Services | Glitch Works Tindie Store -- Vintage Computer Kits and More

          Comment


            #6
            If I understand the OP, he wants to run a Mac using a PS2 keyboard connected to a switch. So, PS2->ADB, not the other way around, if I read him correctly.

            Comment


              #7
              Originally posted by Chuck(G) View Post
              If I understand the OP, he wants to run a Mac using a PS2 keyboard connected to a switch. So, PS2->ADB, not the other way around, if I read him correctly.
              That's the impression I get as well -- I was commenting on why ADB -> USB converters are more expensive than PS/2 -> USB. I personally have probably 10 PS/2 -> USB converters, and *maybe* one ADB -> USB converter that I happened to pick up with some other Mac stuff.
              Check out The Glitch Works | My Retro Projects | Vintage Computer Services | Glitch Works Tindie Store -- Vintage Computer Kits and More

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                #8
                Yes, truth is that I want to connect to my MacSE PS/2 (or USB) keyboard and mouse.
                Reason is that I have all retro computers connected to single switcher where I can switch keyboard and mouse to selected computer by button. Except MacSE - I have ADB keyboard and mouse, but for this switcher is incompatible... My desk is overdosed of computers and having for each computer separate keyboard is impossible. I need two ADB2USB converters, or at least one for keyboard.
                I'm living in Slovakia and my month salary makes for me $28 + $30 shipping for one ADB2USB 1/6 of whole salary... Please forgive me writting about money, I'm only searching for more cheap solution - if I'll find not, I buy them.
                Miro

                Comment


                  #9
                  There were such devices, but they are quite hard to find. This thread may help you: https://68kmla.org/forums/index.php?...se-superdrive/
                  I use my C128 because I am an ornery, stubborn, retro grouch. -- Bob Masse
                  Various projects and oddities: http://oldvcr.blogspot.com/
                  Machine room: http://www.floodgap.com/etc/machines.html

                  Comment


                    #10
                    Well, if you have more time than money and want to embark on an adventure, you can certain take a small MCU (an Arduino should be more than adequate) and code the translation yourself. There's certainly enough horsepower there to do it--and the web does have details on both PS2 and ADB protocols.

                    Comment


                      #11
                      http://www.synack.net/~bbraun/mackbd/index.html

                      Comment


                        #12
                        If the ARM thing is too much for you, I think you could even do one with a little AVR controller.

                        Comment


                          #13
                          The "Big Mess O' Wires" guy is working on a USB to ADB adapter...here's a post about it:

                          http://www.bigmessowires.com/2016/04...-and-bad-news/

                          Might keep an eye on his blog:

                          http://www.bigmessowires.com/

                          May be a final product available some day...if USB to ADB will work for your needs...

                          Wesley

                          Comment


                            #14
                            I'd even be happy with PS/2 to ADB, since that's simpler and I have PS/2 gear here still, but I understand that even the PS/2 stuff is getting rare now.

                            Comment

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