| 摘要 |
PURPOSE:To prevent surely the program copy without requiring complicated processing by loading a program only when a text mark to be copied means a text. CONSTITUTION:A prescribed number of information called directories which are needed for control of programs are stored in the head part of a file. A directory contains a program name 21, a storing address 22 on a medium, a program size 23 occupied on the medium, a copy invalidation mark 24 and other information. The mark 24 defined by the directory of the program to be loaded is checked. Then the program is loaded as long as the invalidity of copy is not shown. While a copy text mark is checked when the validity of copy is shown. When a text is shown, the program is loaded. The the program loading processing is finished in an abnormal state while regarding the program as a copied medium in case the result of loading does not show the text. |
