| 摘要 |
<P>PROBLEM TO BE SOLVED: To increase security strength by a simple means, and to reduce a processing load of a main control unit. <P>SOLUTION: A game machine includes an intermediate control part between a main control part and a peripheral control part. The main control part includes: an inspection value generation part that converts a bit train of error inspection values by a plurality of conversion systems (rotation operation); and a transmission part for transmitting a command to the intermediate control part. An inspection value generation part is provided as a peripheral circuit connected to a main CPU via a bus, and acquires a command. An error inspection value is generated by past commands, and a bit train is converted. A conversion system is changed on the basis of the current command. The conversion system includes regular variation and irregular variation of the amount of shift. The main CPU adds the error inspection value to a read-out command at timing prescribed in a program. The intermediate control part generates an error inspection value for verification, inspects validity of the received command, and allows the peripheral control part to perform processing according to the inspection result. <P>COPYRIGHT: (C)2013,JPO&INPIT |
