Epsilon 1982 was very much Emacs, but programmable in C. But it loaded superfast in MSDOS palmtop HP100LX. I made lots of Epsilon programs, which were easy to translate to real Emacs, of the fake Unix, made by Linus.

  command palidro() {
   set_mark();
   forward_character();
   kill_region();
   down_line();
   yank();
   up_line();
   backward_character();
   }