| 摘要 |
PROBLEM TO BE SOLVED: To gather data of an input/output common control part and to analyze hardware by reading out or dumping held information when the input/output common control part is stopped owing to an input/output-relative software error. SOLUTION: If a monitor timer 31 overflows when an input/output instruction is executed, a monitor timer overflow display circuit 32 is set and a monitor timer overflow information is displayed in an interruption cause display register 33. With mask data, an interruption generating circuit 35 generates a signal BR and the input/output instruction informs software that the monitor timer overflows. The output of the interruption signal BR activates a read control line 28, a read instruction signal CL is inputted to the input/output common control part to stop the operation, and the contents of a readable register and a control memory are read out and sent to a host device. Consequently, when the system stops, the information held in the input/output common control part is read out or dumped to analyze the hardware.
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