I built a brainfuck CPU

[gbizzotto]

I've spent the last few weeks building this.

I'm just happy it works.

You might need to clone the whole repo (which is small) and set Digital's Library path for it to be able to find all the parts.

Take a look at the circuits cited in the repo's description.

Here's the "module" version, with external memory to store the program.

Here's the standalone version, with its own program memory.

[hneemann]

Your display is really impressive! 👍
Even the registers are built from simple gates!

[gbizzotto]

I'd say about 15000, so I guess yes.
The release version works fine. I only had that problem with the pre-release.

[hneemann]

Yes, I noticed that in your example circuit there are many diagonal wires that are present multiple times, which makes no sense.
I have added code that removes these duplicate diagonal wires, which causes this new problem.

[gbizzotto]

By "present multiple times" you mean two wires on top of each other, with identical starting and ending points?
If so, i thought Digital would remove them when they get pasted.
If you mean the repeating pattern present in the design, it's how I managed to have a compact 4x4 LED pattern that I could copy and paste around. I couldn't have straight wires crossing a LED pin without contact.
I could do it all with tunnels. Would that be easier on the software?

[hneemann]

By "present multiple times" you mean two wires on top of each other, with identical starting and ending points?
If so, i thought Digital would remove them when they get pasted.

Yes, but it didn't work with diagonal wires in v0.25. And removing them makes the insertion so slow.
But I was able to fix that. Please try the latest pre-release.

[gbizzotto]

Ah yes, copying and pasting large chunks is MUCH faster. Thanks (:

[gbizzotto]

I've wired a preprocessor that transforms the brainfuck code so that the actual execution becomes easy as pie. I got 2 orders of magnitude out of it and could run mandelbrot.b with an RGB display in about 3 hours.

BF.RGB.mandelbrot.mov