| 摘要 |
PURPOSE:To inhibit generation of an interruption request signal form being duplicated to another central processing unit by holding an interruption unit in the state where the interruption request signal is issued to one central processing unit. CONSTITUTION:A decoding part 9 sets an interruption request trigger signal to a position corresponding to the interruption unit number in an interruption pending latch part 10. When the interruption request trigger is set, a precedence determining circuit 14 sets the interruption request signal to a signal transmitting part 15-0 to transfer the interruption request signal to the central processing unit in the mask on side and transmits the interruption request signal to a central processing unit 1-0. At this time, an interruption requesting bit is set to a latch 16-0, and the indication of this requesting is reported to a selecting circuit 13. Hereafter, the selecting circuit 13 does not output the interruption request trigger corresponding to the pertinent interruption unit number to the precedence determining circuit 14.
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