Question: Question 3 . 6 1 on page 2 2 7 : Register r 1 5 is the program counter. You can use it with certain

Question 3.61 on page 227: Register r15 is the program counter. You can use it with certain instructions
such as a MOV (e.g., MOV pc,r14). However, r15 cannot be used in conjunction with most data
processing instructions. Why?

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