A ring trip detector circuit and method for use with a plurality of subscriber line interface circuits each having at least one telephone unit connected to it, having a ring generator for feeding a ringing voltage to the subscriber line interface circuits, and which detects when at least one of the subscriber units goes off-hook. The phosphor screen comprises a lot of minute phosphor sections. , a III-V semiconductor material on a silicon substrate, comprises: preparing a surface of the silicon substrate with measures including passivating the substrate surface by HF etching, so that the substrate surface is essentially atomically flat. According to the present general inventive concept, the domino logic having a data hold function can be embodied. A jet pump 38 is fluidly connected with the outlet of the first channel such that as the impeller rotates, the jet pump causes fuel to be drawn into the reservoir 37. After said preliminary award is generated, one of said alternative ending sequences is randomly selected to display to the player and the game employs such alternative ending sequence to determine a final award to provide to the player based on the preliminary award and the selected alternative ending sequence.