Read The Effective Address
Step 3 is deciding which operation it is. If this is a Memory operation - in this step the computer checks if it's a direct or indirect memory operation:
- Direct memory instruction - Nothing is being done.
- Indirect memory instruction - The effective address is being read from the memory.
If this is a I/O or Register instruction - the computer checks its kind and execute the instruction.
Read more about this topic: Instruction Cycle
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