| 摘要 |
PROBLEM TO BE SOLVED: To prevent fraudulentness (by a hanging board ) in a game machine. SOLUTION: In a command transmitted from a main board to a sub-board, one fluidized bit is provided. The main board sets one bit in a specified position in generating a command, and changes the setting position at every command transmission (fluidizes). Although the sub-board can know the setting position in advance, an unauthorized board (the hanging board) cannot set the bit in an appropriate position. Therefore, one fluidized bit is used for determining whether or not the command is regular, whereby the fraudulentness can be determined and prevented. COPYRIGHT: (C)2010,JPO&INPIT
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