Function of IR and PC
Write down the function of IR and PC.
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Instruction Register (or IR) holds the instruction being implemented. Its output is accessible to the control circuits, that generate the timing signals for controlling the processing circuits required to implement the instructions. The Program Counter (or PC) register holds track of the implementation of program. It holds the memory address of instruction currently being implemented. Throughout the carrying out of current instruction, the contents of PC are upgraded to correspond to address of the next instructions to be implemented.
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