COMPUTER TECHNOLOGY MRS. SEALE COMPUTER PERFORMANCE.

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Presentation transcript:

COMPUTER TECHNOLOGY MRS. SEALE COMPUTER PERFORMANCE

Boot Process Sequence of events that occurs between the time you turn on a computer and the time that it becomes ready to accept commands.  Purposes  Runs a diagnostic test to make sure everything is working.  Loading the operating system, so the computer can carry out basic operations.

7 Events of the Boot Process 1. Power-On-Self-Test (POST) 2. Boot Program starts & reads OS Loader 3. Operating System Load Program starts running 4. Plug and Play Devices are set up 5. File System is loaded & Graphics Card is set up 6. High-Level Operating System services are loaded & User can Login 7. User-Specific Applications designated to run at startup are loaded and executed.

Circuit Traces Copper and aluminum stripes that connect all of the pieces of a motherboard. Circuits run between  Resistors  Capacitors  Microchips

Microchip Integrated Circuit Houses millions of transistors

Hertz (Hz) Number of times something cycles or vibrates per second  Megahertz = 1 million cycles  Gigahertz = 1 billion cycles Used to measure the speed of your processor  Quartz Crystal Oscillator

RAM vs. ROM RAM  “Random Access Memory”  Can read data from storage without searching sequentially.  Very volatile (changeable)  Cannot hold data when the power is off.  Loses all data when power is lost. ROM  “ Read Only Memory ”  Drives can read data from disks, but cannot store new data on them.  One or more integrated circuits that contain permanent instructions that the computer uses during the boot process.

Binary Number System A method for representing letters or numbers using only two digits, 0 and 1.  Bit  Each 0 or 1  Byte  8 bits Also referred to as Base 2 Binary Code.

Bit (b)  Each 0 or 1 Byte (B)  8 bits Kilobyte (KB)  Approximately 1,000 bytes  Exactly 1,024 bytes Megabyte (MB)  Approximately 1 million bytes  Exactly 1,048,576 bytes Gigabyte (GB)  Approximately 1 billion bytes Terabyte (TB)  Approximately 1 trillion bytes Petabyte (PB) Exabyte (EB) Zettabyte (ZB) Yottabyte (YB) Memory Measurements