Why would memory indirect addressing (i.e., the instruction contains a memory address A, which in turn...

Why would memory indirect addressing (i.e., the instruction contains a memory address A, which in turn is a pointer to memory location B which contains the value) be difficult to implement on the hardware in Figure 5.8?

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Example: A 3-address computer has 40 instructions, 16 Registers, and 256KB memory. Assume each instruction has...

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