| 摘要 |
PURPOSE:To improve the degree of freedom of programming by providing a control part with a start address table capable of address rewriting, and specifying a fixed address and an address of the table according to the cause of interruption and specifying a start address. CONSTITUTION:Interruption causes #1 and #2 are inputted to an interruption cause register 10 and also inputted to an OR circuit 11 to obtain select signals of selectors 13 and 14 through an interruption register 12. Flag signals of respective cause-classified bits of the interruption cause register 10, on the other hand, are all stored in the high-order digit bits of a start address register 15. The start address table 16 is retrieved according to addresses indicated by the interruption register 10 and respective fixed addresses. Gate circuits 17-1, 17-2, and 17-4 select the respective fixed addresses and an address of the start address table 16 with bit signals showing whether the start address table is used or not. |
