| 摘要 |
PURPOSE:To improve the processing efficiency by eliminating such uselessness that the same file is repeatedly read out of an external storage device. CONSTITUTION:A memory is provided with a file data area for storing file data and when there is an external command for reading optional file data out, it is judged whether or not the file data is saved in the file data area; when it is judged that the data is saved, the data in the file data area is processed, but when not, the whole file data of a corresponding kind are read out of the external storage device and processed, and the file data are stored in the file data area. |
