Those weren't used as cursor keys. Cursor motion was done with Emacs commands (C-b, C-f, C-n, C-p). In fact I don't recall the OS using those keys for anythin

Those weren't used as cursor keys. Cursor motion was done with Emacs commands (C-b, C-f, C-n, C-p). In fact I don't recall the OS using those keys for anything at all; they were available to applications, though.