| 摘要 |
PURPOSE:To detect control information even if the information not matching to a control step is read out, by adding information guaranteeing the effectiveness of control information processing in addition to a parity code. CONSTITUTION:A storage address is stored in a storage address register 11 and transferred to a control storage device 13 with an address line (g). The device 13 reads out control information according to the stored address and gives it on a data line (a) and transmits it to an instruction register 8. Whether the content of the instruction register 8 is correct or not is confirmed by an address data line (e), an operation data line (b), an effective information code data line (c), and a parity data line (d). Then, an effective information data 8c stored in the register 8 is transmitted to an effective information code incorrection detecting circuit 15 with a line (c), the code is compared with the content of an effective information code counter 16 and whether it is effective to the control processing or not can be confirmed. |
