30111097
Description
Flashcards by Malachy Moran-Tun, updated more than 1 year ago
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Created by Malachy Moran-Tun
about 4 years ago
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| Question | Answer |
| What is the Purpose of the CPU? | > Process data and instructions via the fetch-decode-execute cycle > Control the rest of the computer system and its hardware |
| What is the Von Neumann Architecture? | > Model for a modern computer > Data and instructions stored as binary > Processor decodes and executes the data and instructions > Processor cycles around to fetch the next data and instructions |
| What does the Program Counter do? | Holds the memory address of the next instruction that will be fetched from RAM |
| What does the Memory Address Register (MAR) do? | > Holds the address of the current instruction that will be fetched from RAM or > Holds the address in memory where data will be transferred to |
| What does the Memory Data Register (MDR) do? | > Holds the data found at the memory address from the MAR or > Holds the data which will be transferred to RAM |
| What does the Current Instruction Register (CIR) do? | Holds the current instruction that is being decoded and executed |
| What does the Accumulator do? | Holds the data being processed and the results of the processing |
| What does the Arithmetic Logic Unit (ALU) do? | Calculates / processes mathematical operations and returns them in the accumulator |
| What are the Stages of the Fetch-Decode-Execute Cycle? | 1. Memory Address in the Program Counter is transferred tot he MAR 2. Program Counter is Increased by 1 3. Processor sends a Signal along the Address Bus to the Memory Address in the MAR 4. Data / Instructions from the Memory are sent to the MDR through a data bus 5. Data / Instructions in the MDR is copied to the CIR 6. Data / Instructions are Decoded and Executed, which are then stored in the Accumulator 7. Cycle Repeats |
| What is the Clock Speed of a CPU? | How many Fetch-Decode-Execute cycles the CPU can Run per Second (measured in Hz) |
| What is the Cache of a CPU? | > Special register in the CPU > Holds frequently used data / instructions > Rids the need to fetch data from the RAM |
| What is a Core? | > Part of the CPU > Capable of fetching, decoding, and executing instructions > Multiple cores allow for simultaneous fetch-decode-execute cycles |
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