Sometime in June 2026, I saw a random post on LinkedIn where someone said they created an emulator for the Texas Instruments TI-99 computer using AI. Could AI really create a full emulator that actually worked? And if so, could it do that for the CoCo?

Turns out, yes, and yes. A CoCo emulator, mostly crafted by AI, has been released. It runs in a web browser! You can find the code here:

https://github.com/star-fs/varispeed-coco2

I cloned (downloaded) that code to my Mac and then opened the index.html file:

Wow! It actually works. Scrolling down shows some neat diagnostics stuff:

That “Active Disassembly” shows what 6809 instructions are running at the moment. It’s fun to watch.

I have not done anything useful with it yet, but thank you star-fs on GitHub for your efforts in creating this!