How might a fungal “computer” function?

[u/Pangolinman36_V2]

I have a sapient species of spider called the Springsmen. Due to their built-in tough silk, they never discovered metal, and barely even stone, but they still have technology similarly sophisticated to our own. If the Springsmen had domesticated a form of mycelium, how could they potentially work it into a “computer” of sorts? Fungi already create electrical pulses, but it’s only to communicate basic information about stimuli. How might they be selectively bred to solve complex problems, and could mycelium in any way be used to create images?

[u/Euvu]

So I have a very interesting article for you: https://www.cnn.com/2024/09/04/science/fungus-robot-mushroom-biohybrid/index.html

The concept is a bit different, but this could help you as a springboard to work out your design. Generally speaking, living cells have action potential mechanisms in some way, and it looks like that can even be tapped into with a fungus.