A CPU core of a game machine displays a game image on an LCD, executes a game process, and performs an updating process on the game image. The techniques include using the class loader to extend a class used by the mobile code such that a method is added to the code which authenticates the mobile code. The invention also relates to the use of the method or test kit for diagnosing Lawsonia intracellularis infections. The method includes combining the coloring agent, the oxidizing agent, and the perfluoro-compound to form a coloring composition; applying the coloring composition to at least one hair and allowing foam to develop on the hair; and removing the developed foam from the hair after a period of time. Alternative embodiments include a SAN interface that is pair of PCI bus interfaces each connected to one of two PCI bus backplanes.