SDD The Processor
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The document describes the Von Neumann architecture, which includes a processor that contains an arithmetic logic unit and control unit connected to memory, input/output devices, and storage. The processor uses registers like the program counter, accumulator, and instruction register to process instructions by fetching, decoding, and executing them. The document also explains that multi-core processors can execute multiple instructions simultaneously by including two or more processing units on a single microchip.
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SDD The Processor
- 2. Von Neumann Architecture Main Memory Output Devices Input Devices Backing Storage ProcessorProcessor
- 3. The Processor Arithmetic and Logic Unit (ALU) Carries out calculations e.g. 10110011 + 11110010 Performs logical operations e.g. AND, OR, NOT ALU
- 4. The Processor ALU Control Unit Control Unit Manages the fetching decoding and executing of instructions
- 5. The Processor ALU Control Unit Memory Data Register Memory Address RegisterOther Registers Registers Very fast temporary storage locations which hold: •data being processed •instructions being executed •addresses of memory locations to be accessed
- 6. The Processor ALU Control Unit Memory Data Register Memory Address RegisterOther Registers Common Registers Instruction Register (IR) Holds the instruction currently being executed by the processor Accumulator (A) Stores the results of arithmetic calculations Program Counter (PC) Stores the address of the instruction currently being executed.
- 7. Multi Core Processor • The first processors only had one core, so could only execute a single instruction at any given time • A multi core processor is a single chip with two or more independent processing units built into it • Multi core processors can execute two or more instructions at any given time
- 8. Multi Core Processor • Dual-core (2), quad-core (4) are common but also 8 core processors and above are available • Need to consider specification more carefully e.g. 3.6GHz CPU single-core vs 2.8GHz dual-core • Used in high end applications and gaming