| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent the increase of control burdens and to perform appropriate restoration. <P>SOLUTION: Image element data set so as to increase a display frequency are read from a CGROM beforehand and transferred to a fixed address area. The plotting circuit of a VDP writes the image element data read from the fixed address area into a frame buffer memory to be stored. When an event interruption standby timer value reaches a limit time decision value without detecting the occurrence of event interruption, the CPU 131 of a microcomputer 120 for performance control starts loop processing and inhibits the start of the execution of performance control interruption processing corresponding to the occurrence of timer interruption. Then, when the reset signals of an ON state are input by the occurrence of time-out without clearing a reset IC 124 with a watchdog, a reset/interruption controller 136 generates the reset of the microcomputer 120 for the performance control and restarts it. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
