In an effort to self-learn more about (virtual) machine code and compilers/parsers/lexers, I created this toy virtual CPU with its own assembler. It's distinctly unlike anything I know exists, specifically to investigate what it takes to make something like this work, and have a free choice of what to put in and what to leave out; also to notice whether old ideas have already nested in my head and if tunnel vision would take hold.
It is also my first dabbling at a parser/interpreter in JavaScript.
Read more in plasm.html.