SLR1.1 Systems Architecture - Computer Science 0.0 / 5 ? ComputingHardwareComputer systemsDatabasesNetworksRepresenting dataSoftwareSystems development lifecycleThe InternetGCSEOCR Created by: LC567Created on: 17-05-24 17:54 CPU Central Processing Unit – processes all operations 1 of 15 Fetch-decode-execute cycle Fetch- retrieve the next instruction and take it back to the CPU Decode- Find out what the instruction is telling it to do Execute- Perform the instruction 2 of 15 ALU Arithmetic Logic Unit- Performs arithmetic calculations and makes logical decisions. 3 of 15 CU Control Unit- sends signals to control how data is moved around in the CPU 4 of 15 Cache Frequently used instructions and data stored closer to the CPU than RAM where it is easier and faster to access. 5 of 15 Register Tiny and super fast pieces of onboard memory with a specific purpose inside of the CPU 6 of 15 MAR Memory Address Register – Holds the addresses of where data is to be fetched or stored 7 of 15 Von Neumann architecture A method based on the stored program concept. Instruction data and memory data are held in the same memory in binary form. 8 of 15 MDR Memory Data Register- Holds the data fetched from or to be written to memory. 9 of 15 Program counter PC – Holds the address of the next instruction in memory 10 of 15 Accumulator AC- Holds the results/answers of calculations 11 of 15 Clock speed The speed of a computer, stated as cycles per second 12 of 15 Cache size The size of the temporary storage of data and instructions. 13 of 15 Cores A complete copy of a CPU. The more cores the CPU has, the faster it can work 14 of 15 Embedded system A computer system with a specific function within a larger (mechanical) system. 15 of 15
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