INT7 Adapter

A new year and possibly many new projects that will be done and also new ideas that will take place. Last year was rather hysteric and this blog one one of many things that I had to put on my “to-do-list” (sadly). Anyway, I atill managed to finish many projects and only a few of then were published. One simple but yet usuable was the Paula piggyback INT7 adapter for Amiga 600/1200/4000(T).

This is not a new feature but I have made it much simpler to acheive it. Previous you needed to be skilled at soldering and solder 3 diodes on the PCB and by doing this also causing permanent damage to your Amiga.

The idea is simple, to use a PLCC-adapter that will be pushed directly on Paula in your Amiga 600/1200/4000(T) and with a momentary button cause the necessary short triggers interrupt 7.



The Result

The difficulty of the installation is more or less minimized but you still need to open your Amiga and some knowledge is still needed. The adapter is gently pushed on top of Paula as the picture below shows.

So What Is It Really Used For?

As a coder (programmer) on Amiga it can be very useful. Assemblers like AsmOne and AsmPro has a feature named “Level 7” that makes it possible to exist never-ending-loops with this feature. If you by mistace (of course) adds some code that cuases a never-ending-loop, just push the button on the momentary switch and it will go back to the main window in either AsmOne or AsmPro.

Also… If you have a custom Kickstart ROM or softkick with the HRTRom software loaded into memory you can also trigger that with the INT7. This functions similar as the Action Replay’s for the Amiga 500/2000 etc.


Depending on what type of floppy drive in the Amiga 600, you might need to bevel one side of the adapter.

  1. ondrej says:

    any place to buy this adapter?

    1. highpuff says:

      Sure, I will send you a PM.

  2. AK says:

    This is exactly what I am looking for my A1200. Where could I get one?

    1. highpuff says:

      I think I have parts for one or two. Send me an email and I will check

  3. nighshft says:

    Hello highpuff,
    just found your website – its great!
    For use with AsmOne/Two I’d really like an A1200 int 7 adapter – would you sell one?
    Kind regards from Austria

    1. highpuff says:


      Sadly I don’t think I have parts at home. Will check later 🙂

      1. nightshft says:

        Hello Highpuff,
        I’m still interested in the adapter, do you maybe have one left for sale for the A1200?
        Thanks and kind regards

        1. highpuff says:

          I need to check if I have parts at home. Else there is some that sells them on eBay.

  4. VPR says:

    I would need at least one INT7 adapter for a1200. Any chance buying it/them right away or in the near future?

  5. VP says:

    Any info on when there will be some available to purchase?

    1. highpuff says:

      Sorry for late reply :/ Let’s talk on Amibay 🙂

  6. Stefan Svellingen says:


    Interested in one of these if you have for sale?
    If not, you have any more info on how to make one, where to get parts etc. anything helps 🙂

    1. highpuff says:

      I think I can help you. Need to check if I have all parts at home first.

  7. Mark says:

    Do you still have these for sale?

    1. highpuff says:

      I think I have parts for one or two left somewhere. For what Amiga do you need it?

      1. Stefan says:

        How are they different between the Amigas?

        1. highpuff says:

          If used on a A600, you have to bevel one edge down a bit. Else on A1200/4000, you do not need to do any mod on the INT7-adapter.

          1. A1200driven says:

            What about C305 on Amiga 1200? I can’t push the adapter down far enough due to this capacitor. A best the adapter would be tilted to the side of the IPL Signals. I’m afraid the adapter would pop off at any time.
            How have you solved this?

          2. highpuff says:

            I used a file to remove some from the PLCC-socket so it could fit OK.

  8. A1200driven says:

    So there IS a mod needed for A1200 😉
    Meanwhile I have solved this in a similar way.
    Thanks a lot for providing this adapter. Great idea and great work!

  9. Andreas says:

    can i buy one?

    1. highpuff says:

      Just checked and I have no parts at home 🙁 But I’ve seen people sell them on eBay.

  10. Wepl says:

    I would like to buy one for A4000. Can’t find some on ebay. Is there any other way to get one?

    1. highpuff says:

      I can fix one, add an wanted ad on Amibay or send an email.

      1. Wepl says:

        I would like to send an email but don’t see your address anywhere here ;(

  11. 70lk13n says:

    Is there any site I can buy this adapter?
    Looks great.

    1. highpuff says:

      Got a new version coming soon 🙂

      1. hms says:

        Great news, need 1 for a600.

        1. highpuff says:

          A600 needs some modding to fit under the floppydrive, but works 🙂

  12. Francisco Manuel Rey says:

    Very nice! Is it still possible to acquire 2 units of this great invention?

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