I started designing retro computers in January 2021. It all started because my first computer was a Microdigital TK82C (a clone of the Sinclar ZX81).
I learned to program on it and had so much fun programming simple ascii games. I missed my little friend and would like to still have it with me... Well... during pandemics, I was chatting with a friend via Zoom and told him my story... He had his ZX81 and gave it to me. Of course, after many years over the closet it wasn't working.
Since I couldn't use it, I started to study the ZX80 and ZX81 schematics to learn how it works and try to fix it. Then, after reading Grant Searle's page, I realized I could create my own clone. \o/ Yey... and my ZX81? I could fix it later. :D
This led me to study other computer architectures and then I started to create my own projects...
The eagle files and gerber I used were created by Wilco2009 (Alejandro Valero). But there are some changes I made to improve the sensitivity of the cassette and another one that I had to do to fix the video output.
I'll update the eagle files asap to add them but the mods are already in my schematics. I also sent some suggestions to Wilco and He added to his post on his blog.
For now, I'm working on Baffa-2 Project but I have plans to create some peripherals like zonx (soundboard clone shown on video bellow), sdcard reader, vga video output, etc.