[uncial]

I'm absolutely going to need a few hours to properly digest this, but here are my preliminary thoughts:

You could almost certainly do a subleq in roons! Tbh it may end up being a practical approach to making a compact full computer -- though seems like it might compromise legibility. This is way outside my wheelhouse, thank you for the links, I have a lot of reading to do.

Re: an ASCII grid -- I explore this a little bit in the tutorials, but because of the up/down nature of the loom, each marble only occupies 25% of the surrounding whitespace, so this kind of display doesn't end up very visible. This is why I'm leaning more towards the peripherals approach for rendering stuff.

[anthk]

Or just send the keys to a typewriter, as some guy did with a ZMachine, Asterisk and the mentioned device. But it would need a microcontroller, or a way to roll a ball in a precise way to type down a letter.