| 摘要 |
PURPOSE:To eliminate a program change despite a change of the system form, by selecting both a task control table and a control table when a system is generated and securing an access to a data just by designating a number by an instruction. CONSTITUTION:An operating system 10 on a main memory 1 includes a control table 100 having its own constitute for each system form and a number put to the data, a control table 600 which stores the type, position and size of the corresponding data for each number, and a control table 500 which stores the head addresses of the tables 100 and 600, the capacity per case of the table 100, etc. The tables 600 and 100 are selected in accordance with the system form when a system is generated. Thus an access is possible to the data just by designating the number by an instruction. Therefore the construction can be changed without changing the program. |
