| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that, right after starting a power supply, a conventional game machine executes a process for a time of a power cutoff due to an insufficient power supply voltage and causes a stack overflow. SOLUTION: Even if the process for the power cutoff time is executed after the power supply is started from a power circuit of a power board and a main CPU starts the control, if a power voltage V to be input in a VSB terminal of a power monitor IC is secured not to lower to a prescribed voltage (17.2 [V]), the access to the main RAM is not permitted by the processes of S108 and S109. This constitution can prevent the occurrence of multiple stack such as saving the value of a register again in a stack area which has saved data already in a state where the register value saved in the stack area of the main RAM is not returned yet. Consequently, this constitution can eliminate the occurrence of the stack overflow. COPYRIGHT: (C)2008,JPO&INPIT
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