Every update routine returns here. It stirs R into the random number -- R counts instructions, so the numbers depend on how long each update took -- and moves IX to the next record, going back to START until all 54 have had their turn.

Then the turn is finished. The turn counter goes up, the objects to be drawn are listed (LIST_DRAWN), and RENDER_DYNAMIC_OBJECTS wipes what moved, draws the objects in depth order and copies the changes to the screen. SPACE or CAPS SHIFT on its own pauses (PAUSE). Then it burns whatever time is left, so that the game runs at an even speed: it waits six units less the turn's drawing work (DRAW_WORK, CONTROL), which SORT_AND_DRAW and RENDER_DYNAMIC_OBJECTS count in objects drawn and areas wiped. A unit is 1280 turns of a 26 T-state loop, about 33,300 T-states, just under half a frame. So a room where fewer than six things change runs as fast as one where six do, and a busier one runs slower: the wait can only pad, never take time back.

On the first turn in a room the whole screen is redrawn: the room's colour over every attribute, the carried things, the panel, the lives and the score, and the whole buffer copied to the screen, with a short sound. Last, if both of the player's records are empty -- they become so when his dying is over -- a life is lost; otherwise the next turn.