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a) Fig. 1 shows a processor's internal datapath. Cs -C11 M M B R Cho C12 AC PC IR -C13 ALU Control signals M A
a) Fig. 1 shows a processor's internal datapath. Cs -C11 M M B R Cho C12 AC PC IR -C13 ALU Control signals M A R Control unit Clock Control signals CR: read memory control signal CW: write memory control signal CALU: ALU control signal Fig. 1 i. Show the micro-operations and control signals for the processor to execute the following operation: AC = AC - X, where X is a location in main memory [6 marks] What is the disadvantage of the datapath implementation and what is the alternative of it? [2 marks]
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