13.2.4. Stage 3: Result Storage

Try these first

1. 1.

   What does the PC do?

   Hint

   Think about what keeps track of the instruction sequence.

2. 2.

   What is the purpose of the Instruction Register?

   Hint

   What does the CPU work on at any given moment?

3. 3.

   What is the role of the Program Counter (PC)?

   • To hold the current instruction
   • To keep track of the next instruction's address
   • To manage memory data

   Hint

   Think about its job of keeping things in order.

4. 4.

   True or False: Control signals determine when data can be retrieved from memory.

   • True
   • False

   Hint

   What guides the timing of events in the CPU?

5. 5.

   How would the execution process change if the CPU did not have a dedicated Memory Address Register (MAR)? Explain the implications.

   Hint

   Consider how the CPU currently quickly accesses addresses and what impact misaddressing could have.

6. 6.

   Given an instruction cycle, simulate the increment of the PC and the flow of data from the MDR to the IR. Describe the signals that guide this process.

   Hint

   Trace the exact steps from the start to the end of the instruction cycle and keep an eye on the signals.