| 摘要 |
PURPOSE:To improve the reliability of a test and to attain the test without sending an operator by discriminating a flag added to data which indicates the testing of a device to be tested to execute the test. CONSTITUTION:Data 36 are inputted from a transmission line 33 to a processor 32 to be tested and data obtained by adding a flag indicating the test mode to the calculated result of the input are outputted to the transmission line 33 as the output data 37. Processor 28-31 other than the processor 32 to be tested fetch in the data 37 from the transmission line 33, check the test mode flag in the data 37, and when deciding that the data 37 have been outputted from the processor 32, neglect the data 37. On the other hand, a tester 38 is connected to the transmission line 33 to input all data transmitted in the transmission line 33. The tester 38 checks the test mode flags of respective data, and if the data are outputted from the processor 32, outputs the data to a printer 39 or stores them in a storage device 40.
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