| 摘要 |
PURPOSE:To increase the sectioning function at failure, by transmitting an output data received from a central processing unit to the central processing unit by return transmission. CONSTITUTION:In transmitting an output data received at a folding register 46 to a central processing unit 1 by return transmission, the read-in of the register 46 is indicated to an input and output command signal 11. Thus, the output of an input and output device address decoder 42 and an output 101 of an input and output command decoder 43 inhibit for the input data signal 24 from being transmitted to an input data signal 14 with an AND gate 39 via an AND gate 45 and a NOT gate 38, and the output of a folding register 46 is transmitted to the input data signal 14 with an AND gate 40 and an OR gate 41. |
