Embodiments are shown of a floor opening andor closing system for pellet stoves and other solid-fuel combustion devices with ash-dumping floors. A plurality of interconnect layers, each including an interlayer dielectric film 405 and a copper interconnect 407, is stacked and a solder resist layer 408 is formed on an uppermost layer. Then, an initial feature coordinate grid is determined from the positions of the corner features. The triggering of a warning signal indicates the deviations of the parameters of alterations of the immersion liquid from the associated desired values. The test monitor includes a method for executing instruction sequences simultaneously in several processors of a multiprocessor machine.