| 摘要 |
PURPOSE:To set serially a program for diagnosis of an electronic equipment to an instruction register and to eliminate the need for increment of the hardware for diagnosis, by providing a serial shift function to an instruction register which holds an execution program. CONSTITUTION:A machine instruction which regulates the working of an electronic equipment is stored in a main memory 1, and the instruction read out of the memory 1 is held at an instruction register 2. Then a microprogram sequence control circuit 3 controls the execution of a microinstruction. While a microprogram is stored in a control memory 4, and the microinstruction read out of the memory 4 is held at a microinstruction register 6 having a serial shift function. Then a diagnosis program of electronic device is set serially to the register 6 by a microdiagnosis control processor 8. The processor 8 reads control signals C1-Cn generated by a control circuit 7 to decide whether the circuit working is normal or not. |
