| 摘要 |
PURPOSE:To continue the processing as it is at the time when abnormality is generated due to a noise, etc., in the course of using a communication adaptor by providing a counter area for the number of times of blank interruption and a blank interruption processing means for executing a return from the interruption. CONSTITUTION:When an interruption of a high level is generated in the course of running a program, a control is delivered to a processing part 13 from an interruption vector address 12. In the processing part 13, a register 15 is referred to and the cause of the interruption is checked. When the cause is normal, a protocol processing corresponding to the cause of the interruption is executed, and thereafter, returned to the program before the interruption. In the case of a blank interruption of a noise, etc., the register 15 is referred to, and it is decided that the blank interruption is abnormal. Subsequently, a counter in a counter area 16 is added by one at every interruption vector, and the processing returns to an interruption spot without executing the protocol processing. When the blank interruption is intermittent and not generated thereafter, the processing can be continued normally. If it is generated frequently, the cause can be known by checking the counter area 16. According to this constitution, even if a blank interruption occurs, a software comes to execute no abnormal operation. Also, from a result of counter-log, abnormality of a hardware related to the blank interruption can be detected. |
