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4 cards from this section. Quick, good the night before a test.
What are the two main phases of the instruction cycle?
Think about how CPUs handle instructions.
What does the Program Counter (PC) do?
It points to where the CPU should go next.
What phase follows the Fetch phase in the instruction cycle?
Think about what comes after retrieving a task.
True or False: The Instruction Register stores the next instruction to be fetched.
Identify what the IR actually does.
Suppose you have a CPU with a 12-bit address bus and a 16-bit data bus. Calculate the maximum memory that can be addressed and how many different instructions can be defined given a 4-bit opcode.
Consider how binary powers work for memory addressing.
Describe how the CPU could process a sequence of three instructions: LOAD from memory, ADD a value, and STORE the result back. Specify the role of the relevant registers.
Focus on the flow of data and where it is held during each step.
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