ITEC 1010 Lecture Notes - Lecture 2: Portable Media Player, Hertz, Storage Area Network
17 Nov 2017
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Document Summary
Cpu: central processing unit (arithmetic/logic unit, the control unit, and the register areas) Sequentially accesses program instructions, decodes them, and coordinates the flow of data in and out of the alu, registers, primary storage, and even secondary storage and various output devices. Computer memory: registers (stores very small amount of data and instructions for a short period of time) Primary storage (main memory stores data, instructions, and operating system programs during program execution) Secondary storage (very slow compared to 1 and 2) Clock speed series of electronic pulses produced at a predetermined rate that affects machine cycle time. Measured in : megahertz (mhz): millions of cycles per second. Physical characteristics: most cpus are collections of digital circuits imprinted on silicon wafers or chips, no bigger than the tip of a pencil eraser (very small) Multiprocessing: multiple processors to instruct at the same time. Parallel computing: the same task on multiple processors to obtain results faster.
