| 摘要 |
PURPOSE:To detect the memory destruction surely, by outputting the alarm signal when the initial value and the current value of the memory do not coincide with each other. CONSTITUTION:Computer programs recorded on cards 1, magnetic tape 2, and paper tape 3 are stored in bulk memory 5 successively. Contents of memory 5 are added for every group section, which is designated by program group designating circuit 100, by adders 10 and 11 and are inputted and stored in registers 12 or 13. In this case, contents of memory 5 from the start address to the end address are stored in register 12 as the initial value. According to start command ST of the computer system, contents of memory 5 are stored in register 13. Contents of registers 12 and 13 are compared with each other by comparator 18; and if they do not coincide with each other, indicator 19 for the alarm indicating memory destruction is lit. |
