100r's Uxn/Varvara aspires to be that, but that's not the same thing as succeeding at it. AFAIK the smallest computer with a full Uxn/Varvara implementation is a Nintendo DS [correction! Game Boy Advance], which is faster than the Sun workstation I was using in the 90s (though it has less RAM). You probably aren't going to get it running on an eZ80-based TI calculator, for example, or an Arduino UNO.
It's a good first step in that direction, the first attempt at permacomputing good enough to criticize.
It's a good first step in that direction, the first attempt at permacomputing good enough to criticize.