14.4.2. Recap of Single Bus Organization

Try these first

1. 1.

   What is a single bus architecture?

   Hint

   Think about how different parts of a computer interact.

2. 2.

   Name one register involved in the single bus architecture.

   Hint

   Consider the names of registers defined in this architecture.

3. 3.

   What does the Program Counter (PC) do?

   • Holds the address of the next instruction
   • Stores the current instruction
   • Keeps track of data processed

   Hint

   Consider the role of the PC in the instruction lifecycle.

4. 4.

   True or False: Indirect addressing mode requires two memory accesses to retrieve the operand.

   • True
   • False

   Hint

   Think about how many times the memory needs to be accessed.

5. 5.

   If you had an instruction using indirect addressing, explain the sequence of operations required to execute it, including the number of memory accesses involved.

   Hint

   Think about each step leading to the final operand retrieval.

6. 6.

   Critically evaluate the efficiency of a program that predominantly uses indirect addressing mode compared to direct addressing. What considerations must be factored in?

   Hint

   Assess how performance could be impacted by the number of memory accesses.