INFORMATION PROCESSOR

PURPOSE:To perform efficient interruption processing by making interruption uniform among interruption request devices. CONSTITUTION:This information processor successively and serially connecting an interruption controller and plural interruption request devices is provided with interruption judge circuits 260, 360 and 460 to instruct interruption permission detection circuits 230, 330 and 430 for transmitting the permission of interruption to the other interruption request device when the other interruption request device is under requesting the interruption and the number of times for holding the interruption is less than the manually instructed number of times even while the interruption is just requested, when the the permission of interruption is detected by the interruption permission detection circuits 230, 330 and 430, and to decide the execution of interruption under requesting even while the other interruption request device is just under interruption requesting, when the interruption is just requested and the number of times for holding the interruption is equal to the manually instructed number of times.