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I did pretty much the same thing with https://github.com/kragen/peg-bootstrap/blob/master/peg.md, although admittedly hand-compiling to JS was noticeably less work than hand-compiling to assembly language would have taken. My friend Dave did something similar with Val Schorre's META-II: https://queue.acm.org/detail.cfm?id=2724586 (missing the figures for some reason, so see:) doi:10.1145/2697401

We are merely observing the footsteps of compiler gods.

Ehh...I taught myself machine code programming when I was 11. Hand translating programs I wrote in Assembler on paper to byte code and typing it in byte by byte. And I am no programming God. So it might be less hard than you think :)