Fortunately, we have a pretty small instruction set that looks like it’s easy to break down. If you treat opcodes as 3 octal digits (0NN, NNN, NNN) it looks like it makes more sense.
eg the “do something to A” opcodes are 10AAABBB with A being the operation and B being the source, while the version that takes an Immediate is 11AAA110
the real version of this is at my dad's house somewhere needing a new power jack soldered in lol
it was my dad's band's and ended up my first keyboard
yeah, it looks like a toy and the presets are awful. but it has a unique sound and you can get some POWERFUL sounds out of it with the right programming (and some simple effects)