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(10 points) To implement the NOT instruction in LC-3, five cycles are required. Below are the operations performed in each of these cycles: cycle 1:
(10 points) To implement the NOT instruction in LC-3, five cycles are required. Below are the operations performed in each of these cycles: cycle 1: MARPC,PCPC+1 cycle 2: MDR M[MAR] cycle 3:IIRMDR cycle 4: Decode cycle 5: Destination register complement of operand For cycles 3 and 5 above, specify the values of the control signals in the table below. The table already shows the signals in cycles 1, 2 and 4. You do not need to enter values for cycle 4 . These control signals are shown in the data path in the textbook. Note that the "LD" signals determine whether the corresponding register will be "write-enabled". For instance, when LD.PC =1, the PC register is write-enabled. The GatePC, GateALU and GateMDR signals determine whether the corresponding tri-state gates will be enabled. For instance, when GateMDR = 1, the output of the MDR will be placed on the bus, and when GatePC =1, the contents of the PC will be placed on the bus
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