| 摘要 |
PURPOSE:To ensure the quick analysis for the factor of a fault by storing periodically bus information into a memory and then reading it out of the memory until a fault is detected for the state of a common bus while monitoring said state. CONSTITUTION:A bus control part 2 collects the states of a common bus due to the instructions and data which are transferred between a processor 1 and an input/output device 3 with the periodical sampling while monitoring the state of the common bus and then records these collected states to a bus information recording part 4. If a falut is detected with the bus, the transfer and recording of the bus information are stopped to the part 4. As a result, the state and the factor of a bus falut is understood by reading and retrieving the recorded contents of the part 4. |
