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Whats the difference between MAR being used as a register and MAR being used as an indirect address?

April 26, 2017address difference indirect MAR REGISTER Used

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Whats the difference between MAR being used as a register and MAR being used as an indirect address?

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A good example of the difference might be the opcode 00001110. This instruction loads MAR with the address from memory currently pointed to by MAR. In other words, MAR = memory[MAR]. Officially, this code is not correct in that it is an 8-bit operation and MAR is a sixteen bit register. See the next question to address that issue.