| 摘要 |
PROBLEM TO BE SOLVED: To directly select an interrupt processing routine according to hardware by unnecessitating any polling processing by software or the rewriting of software. SOLUTION: An interrupt controller INTCTR successively accepts interrupt signals from devices A, B, and C, and outputs an interrupt request signal IRQ and interrupt generating device information INTSEL, and starts the acceptance of the next interrupt by waiting for an acceptance signal IRQACK. A controlling part 1 outputs the origin address of an interrupt processing routine group corresponding to each device, and returns the acceptance signal of the interrupt request signal IRQ to the interrupt controller INTCTR. An interrupt processing routine calling mechanism MAP is provided with a register which registers the offset group of each interrupt processing routine, and the offset of the interrupt processing routine corresponding to the device which generates the interrupt request is searched from the interrupt generating device information INTSEL, and added to the original address.
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