The Essentials Of Computer Organization And Architecture 4th Edition by Linda Null,Julia Lobur

Exercise 106

Building on the idea presented in exercise 51, suppose that MARIE has a hardwired control unit and we decide to add a new instruction that requires 8 clock cycles to execute. (This is one cycle longer than the longest instruction, JnS.) Briefly discuss the changes that we would need to make to accommodate this new instruction.
Reference of Exercise 51:
Suppose you are designing a hardwired control unit for a very small computerized device. This system is so revolutionary that the system designers have devised an entirely new ISA for it. Because everything is so new, you are contemplating including one or two extra flip-flops and signal outputs in the cycle counter. Why would you want to do this? Why would you not want to do this? Discuss the trade-offs.