JPH05342014

PURPOSE:To enable switching control due to interruption after only the possible interruption is limited by suppressing the utilization of a field in a PLA at a minimum in an operand access sequencer and eliminating the control of an entry on which no possibility of interruption is present. CONSTITUTION:This system is provided with the field 27 of one bit indicating the permission of interruption, and one bit in an entry address is also used as the bit information 26 of the entry indicating the possibility of interruption. The judgement of interruption conditions or the decision of an address at the interrupting destination is performed by a hardware and only when the field 27 of on bit indicating the permission of interruption is turned on, the interruption is permitted.