| 摘要 |
PURPOSE:To improve the reliability of the whole process control by storing the contents of the main memory device of a computer system exclusively consisting of the main memory device, and by reading the contents of the main memory device at need. CONSTITUTION:If one of arithmetic controller 73, main memory device 74 and process input-output controller 79 is troubled, an interruption signal is supplied to arithmetic controller 85. Controller 85 and main memory device 84 transfers the contents of main memory device 76, stored in auxiliary memory device 88 for enabling arithmetic controller 75 to process process input and output M+1-N by using process input-output controller 80 and switch 82, to device 84 and then supply them to device 76 by using a data transmitter. Then, the computer system consisting of devices 75, 76 and 80, and switch 82 processes process input and output M+1-N. Thus, the reliability of the process control is improved on the whole. |
