Excuse me, I was offline for some days (relax 🙂 ).
Looking here and there I noticed those commands, but, as you said, whitout documentation.
Some time ago, for this site, I converted some LD games (Starblazers, Freedom Fighter, Platoon).
For better converting StarBlazers, I needed commands for drawing lasers and other stuff (I would like to have a command for drawing polygons (filled or not), at least triangles, and better sprite commands for Freedom Fighter.
Now I read that Santa is bringing gifts.... documentation!
THANKS, really 🙂