| 摘要 |
PURPOSE:To prevent data inputted to an inputtable field from being changed until a host fetches input data after issuing information to the host, by setting the inputtable field that is not an input prohibited field as the input prohibited field corresponding to the interruption of an input part. CONSTITUTION:A flag area 13 is provided in advance, and a flag corresponding to a field where inputting is prohibited after the interruption of the host is set in the area. Therefore, since it is possible to change an input prohibited flag area (a) based on the content of the interruption flag area 13 by the information of the interruption, it is possible to set a desired field as the input prohibited field before informing the interruption to the host, and to prevent the input data from being changed without putting load on the host.
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