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    Control of AC Register

    The gate configuration is derived from the control functions in the list above. The control function for the clear microoperation is rBn, where r = D7/T3 and Bn = IR(ll). The output of the AND gate that generates this control function is connected to the CLR input of the register. Similarly, the output of the gate that implements the increment microoperation is connected to the INR input of the register. The other seven microoperations are generated in the adder and logic circuit and are loaded into AC at the proper time. The outputs of the gates for each control function is marked with a symbolic name. These outputs are used in the design of the adder and logic circuit.


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