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The Mecrisp Ice Forth interpreter requires about 5K of RAM, a customasm application requires less. If you replace Forth with #customasm, then you could give a stack machine 1K words of memory and 1K words of program , which would give you 64 cores on a single GateMate, or 1600 soft core stack machines on the largest. GateMate chip. And you can connect them in whatever topology you want.
---All that we need is an application.---