INTERRUPTION MULTIPLEX CIRCUIT AND INTERRUPTION MULTIPLEX SYSTEM

摘要

PROBLEM TO BE SOLVED: To accelerate an interruption processing and to accelerate the entire system by selectively outputting the start address of the interruption processing to a CPU corresponding to an interruption request. ;SOLUTION: In this interruption multiplex circuit 5 for informing the interruption requests by one signal line relating to the plural interruption requests, a priority judgement part 6 outputs signals for indicating the interruption request of highest priority among the inputted interruption requests corresponding to the prescribed priority set beforehand when the plural interruption requests are simultaneously inputted. In an address register 7, so as to make the start addresses of the plural interruption processings correspond to the plural interruption requests inputtable to the priority judgement part 6, positions 71-7n for storing the respective start addresses are decided beforehand. A selector 8 selectively outputs the address present at the position storing the start address of the corresponding interruption processing to a data buffer 9 based on the signals for indicating one of the interruption requests from the priority judgement part 6.;COPYRIGHT: (C)1998,JPO