Knight Lore: Routine at AFBA

Used by the routine at exit_screen.

Builds the room Sabreman is in -- its walls and objects into the object table, and the flag that tells no_delay to redraw the whole screen -- then falls into onscreen_loop, which runs frames until something jumps out. Leaving a room comes back here from exit_screen, so this is the loop over rooms and onscreen_loop the loop over frames.

Used by the routine at exit_screen. Builds the room Sabreman is in -- its walls and objects into the object table, and the flag that tells no_delay to redraw the whole screen -- then falls into onscreen_loop, which runs frames until something jumps out. Leaving a room comes back here from exit_screen, so this is the loop over rooms and onscreen_loop the loop over frames.
game_loop	AFBA	CALL build_screen_objects	build the room's objects and clear the screen buffer