State the purpose of the CPU - Fetch, decode and execute, Describe what is meant by 3mhz - It refers to the clock speed and indicates how many instructions may e processed in a second, Describe what is meant by quad core - The computer has 4 cores which are independent of each other. They can perform multiple tasks, Explain how the clock speed of a CPU affects it's performance - The higher the clock speed the faster the CPU will run as it represents the number of fetch, execute cycles per second, State two tasks carried out by the CPU when processing data - Fetch, decode and executes instructions, Explain how the cache size of a CPU affects the performance - The higher the cache the more space there is to store instructions that the processor needs., Describe the purpose of the MDR - The MDR stores the data that will be read/fetched from the memory, Gareths computer contains an embedded system. What is an embedded system? - A computer systems that is built into another device focused on one purpose. , Identify three embedded systems - Dish washer, MP3 player, Washing machine, Microwave and SatNav, Describe the characteristics of the Von Neumann architecture - Both data and programs are stored together in the same memory, List two operations carried out by the ALU - arithmetic operations and logical instructions, Describe the purpose of the MAR - The MAR stored the location of the data where data will be read/written/ accessed/ fetched , What is used to connect different components in the CPU - buses, What's the purpose of the CU - Co-ordinaates and controls all the operations carried out by the CPU, Describe how the CPU and RAM work together - Data is stored in the RAM and fetched by the CPU. The CPU processes and executes the data, Describe the purpose of the cache - Stores data that is frequently used. It speeds up the process as data does not need to be fetched from RAM, What is the purpose of the program counter - Points to the next instuction that needs to be executed . It is located in the CU and is incremented on each new cycle, What is the purpose of the accumulator - Stores the results of the arithmetic and logic results temporarily , What does the clock do - Sends a continuous series of electronic pulses, Why is a smart watch an embedded system - A smart watch is not a general purpose computer which means its has a limited function. It is a computer system built within the watch and has a built in OS., Describe the purpose of a dual core processor over a single core processor - Tasks can be split between the processors which results in it running faster. Allows multi-tasking and runs more than one process at one time, Describe the tasks performed by the CU - Provides timing signals, control signals and sends signals to the memory, How does the CPU determine whether it is representing an instruction or data - Instructions and data are fetched at different points of the execute cycle, Why might a computer not necessarily run faster with a quad core - Software might be designed to run on one core and the clock speed, size of RAM and cache can also be a factor.,

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