| 摘要 |
PURPOSE:To reduce the amount of logic and to simplify the control circuit itself, by unifying the detection system of the error detection circuit in the circuit controlling the address of control memory unit. CONSTITUTION:The microinstruction is read out from the control memory unit 9 storing the microinstruction corresponding to the instruction code read out from the main memory unit, the microinstruction to be executed next is determined to execute the microinstruction sequentially. In such a control system, the parity bit information in the counter A3 is stored in the unit 9, microinstruction is read out from the unit 9, the microinstruction register 10 loads it, the parity bit information is read out, and the information is given to the error detection circuit 11 through the selector 8 by adding it as the parity bit of the counter A3 to perform error detection. |
