Used by the routine at AFTER_GAME.

Called from the main loop (AFTER_GAME) at the start of every life and after every walk through a doorway (EXIT_LOW_U), with IX on the legs. Puts the valves of the room being left back into their places (UPDATE_SPECIAL_OBJS) -- unless no turn has been played since the game began (PLAYED) -- builds the room's records (BUILD_ROOM), clears the screen buffer (CLEAR_SCRN_BUFFER), fills the two valve records from the places (FIND_SPECIAL_OBJS_HERE), and puts the robot in the doorway he came in by if he came through one (ADJUST_PLYR_UVZ_FOR_ROOM_SIZE).

Then the room's state: nothing dropping from the ceiling (DROPPING), no orders for the remote-controlled robots (REMOTE_ORDERS), LEAPING cleared, and DROP_LATCH set in an even-numbered room, so that nothing drops there until something is picked up. NEW_ROOM tells the main loop to redraw the whole screen, and the room is marked seen (MARK_ROOM_SEEN).