Electronics, coding and hacking. And ADD.

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APECAT writing to RAM, running code


There's a joke that goes something like this.

- "Timing!"
- "What is the most important part of a joke?"

And, as it turns out, timing is apparently quite important for my code as well. My original timing was way off, but after removing a bunch of unnecessary delays, speeding up the ATmega clock, and pulling a few more tricks, the code gradually started working.

I'm still experiencing some issues now and then, but this becomes increasingly rare as the code gets more mature every day.

Have a look at the video below for a quick summary. Apart from the APECAT board, this Amiga has nothing attached.

As much as I hate hearing my own voice, I've made a short clip here explaining how the board works, including a short demo of it.

Even though this was just a silly test program in this video, we can go deeper and think bigger. We can patch the system kickstart and do all sorts of magic behind the scenes, as we now have complete control over the system.

Right now I'll start drawing revision 2 of the PCB and we'll see where that takes us. I'm aiming for infinity and beyond.

(Thanks to commenter John ][ for inadvertently having me take another look at the code)


to APECAT writing to RAM, running code

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  • Very cool, indeed! Inspiring blog, keep it up.

    #1181 | Comment by Christian on Sep 15, 2019 08:06am
  • Yeah !
    Well done :-)

    #1182 | Comment by John ][ on Sep 16, 2019 01:09pm
  • can u contact me in reguards to a1up mod assistance pls

    #1189 | Comment by mord on Oct 31, 2019 08:39am
  • Hello, I've searched a way to send an email to you, but it seems there is no other way except a post :-)

    I've read about your c64fc and I want to use also a IDT 7006 with 16K. But your schematics is a little bit to old (7005) and there is no A13 on the right side, so you have only access to 2K. Can you update the schematics, so that I can use it?

    #1195 | Comment by Friendship on Nov 5, 2019 12:31pm
  • @Friendship: I will look into that ASAP.

    #1196 | Comment by admin on Nov 6, 2019 09:51am
  • hey i wanted to know if you can help me with my a1up

    #1210 | Comment by Joseph on Oct 7, 2020 02:43am

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