Podcast
Questions and Answers
The Fetch - Execute cycle is performed by the ______ millions of times every second.
The Fetch - Execute cycle is performed by the ______ millions of times every second.
CPU
The ______ register displays the address in RAM of the next instruction to be processed.
The ______ register displays the address in RAM of the next instruction to be processed.
Program Counter
The instruction in RAM is transferred to the Memory Data ______.
The instruction in RAM is transferred to the Memory Data ______.
Register
The ______ stores the result of mathematical or logical calculations.
The ______ stores the result of mathematical or logical calculations.
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The instruction in the Current Instruction Register (CIR) is ______ and executed.
The instruction in the Current Instruction Register (CIR) is ______ and executed.
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Study Notes
Fetch-Execute Cycle
- The CPU performs the Fetch-Execute (F-E) cycle millions of times per second to process data and instructions for programs.
- A register is a small storage space in the CPU for temporary data, each with a specific role.
Essential Registers in Fetch-Execute Cycle
- Program Counter (PC): Tracks the memory address of the next instruction to be executed. Its value is copied to the MAR.
- Memory Address Register (MAR): Holds the memory address of the instruction the CPU is about to fetch.
- Memory Data Register (MDR): Stores the instruction fetched from RAM.
- Current Instruction Register (CIR): Temporarily holds the instruction fetched from RAM for decoding and execution.
- Accumulator (ACC): Stores the result of mathematical and logical calculations.
Steps in the Fetch-Execute Cycle
- The PC holds the address of the next instruction in RAM.
- The address in the PC is copied to the MAR.
- The CPU accesses the memory location in RAM corresponding to the address in the MAR.
- The instruction in RAM is transferred to the MDR.
- The instruction in the MDR is copied to the CIR.
- The CPU decodes and executes the instruction from the CIR.
- Any results of the execution are stored in the ACC.
- The cycle repeats by returning to the first step and checking the PC for the next instruction's address in RAM.
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Description
This quiz covers the Fetch-Execute cycle, a fundamental process in CPU operations. You will learn about essential registers such as the Program Counter, Memory Address Register, and others, along with the steps involved in executing instructions. Test your knowledge on how the CPU processes data seamlessly.
