Cache , Very fast memory close to the CPU , The Arithmetic Logic Unit, Completes calculations and performs logic operations, The Control Unit, Responsible for the flow of data inside the CPU , Registers , Super fast memory inside the CPU - each having a specific purpose, Central Processing Unit , Executes instructions stored in main memory - Fetch / Decode / Execute, Random Access Memory (Main Memory), Storage location of program currently being executed, MDR , Register holding the data currently being processed, Clock speed, Determines how many instruction cycles the CPU can deal with in a second, 4.6GHz, Equivalent to 4.6 Billion Cycles per Second, ROM, Holds the boot-strap instructions needed to start the computer, STA 06, Example of assembly language (Low Level), MAR , Register holding the address of the where data is to be read from or stored to, Program Counter , Holds the memory location of the next instruction to be fetched, 01000001, Example of Machine Code (Low Level), Secondary Storage, Log term non-volatile storage, Solid State Drive, Robust because they contain no moving parts, Hard Disk Drive, An example of a magnetic storage device , Virtual Memory , Area of secondary storage used as extra RAM, Accumulator , Stores intermediate results of calculations, Embedded System, A computer built into another device. E.g Smart TV.

System Architecture

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