| 摘要 |
PURPOSE:To use a regular MP as a diagnostic MP by providing a diagnostic start address register, a coincidence address register, a coincidence detecting circuit and a mode switching device, in a microprogram MP. CONSTITUTION:A diagnostic start address register 4 is shifted to an instruction word read-out address register (CSA)5 by an MP start instruction from a diagnostic processor 1, and a regular processing MP operation is started. When address information of a CSA5 coincides with address information of a coincidence address register 3, and also a mode switching device 8 is ''1'', an execution stop of the regular processing MP is executed by a coincidence detecting circuit 6. At the same time, an address coincidence interrupting signal 53 becomes ''1'', and becomes an interruption to the device 1. The device 1 receives the signal 53, analyzes a result of execution of the regular MP executed as a diagnostic use and decides whether the hardware is normal or abnormal. The device 1 can know the result of execution by a diagnostic processing instruction which it should have originally. |
