| 摘要 |
PURPOSE:To offer easily only a microprogram executing locus which is required by an analyzer, by executing a control for starting a store of an executing locus of a microprogram, when the number of times of an instruction processing has reached a designated number of times. CONSTITUTION:Before executing an issue of an instruction, the number of times of an instruction processing (n) before starting a store of a microprogram executing locus is set to a register 30 which is provided on a communication control device 6, by using a maintenance supporting device 5, and also a switch of a microprogram store area 20 is set to off so that the executing locus is not stored. (n) is a positive integer except '0'. When the communication control device 6 receives the instruction, the communication control device 6 executes the instruction and executes the processing in accordance with the contents which are stored in the microprogram store area 20, under a control of a microprogram execution controlling circuit 10.
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