Running my continuation-passing-style concatenative evaluator ContinueForth in jart's Blinkenlights
It's written in 250 lines of asm so far, and Blinkenlights has been huge in helping me visualize what the program is doing. I imagine that I can reduce the size by about 30% as is by removing a number of redundancies, I may also do a low-byte count version not unlike jart's SectorLisp and cblum's SectorForth for 16-bit which can fit into bootsectors.
I need to decide on the specifics of my code/data format before writing the loader, right now programs are hard-coded but that comes next!