OS
This is a diagram detailing the use and function of the operating system. The operating system communicates with Human Uses, Application System, Other System Software and Hardware, either directly or indirectly.
Friday 19 September 2014
Software - OS, Purpose and Applications
Software
Operating System
Windows (Vista, xp, 7, 8, 95, 98) installed on PC with a license
Linux (Ubuntu, red hat, raspberry OS) Linux is free and open-source
IOS - iphone tablets, watches
Android - phones tablets, kindle
Mac OS - Apple mac
Blackberry OS - blackberry phones, tablets
Unix - specialist machines
Purpose
User interacts with the OS and the OS interacts with the hardware and vice versa
The OS uses a GUI (Graphical User Interface)
CLI (Command Line Interface)
Applications
Applications do everything else you may want.
Thursday 18 September 2014
Start up Process - BIOS and CMOS
Start up
- Turn On
- BIOS (Basic Input/Output System)
Show error if something isnt working
Set options such as boot devices
You CANNOT write to it as it is a kind of ROM chip (Read Only Memory)
- CMOS (Complimentary Metal Oxide Semi-conductor.
The CMOS is a kind of RAM (Random Access Memory)
Will save setting changes.
There is a battery associated to the CMOS that will keep enough power after power is cut off to allow the CMOS to save changes.
Friday 12 September 2014
Unit 2 Notes Computer Hardware
Unit 2 notes~
Motherboard
The Motherboard connects all parts of the computer together. Also known as the system board.
CPU
The Central Processing Unit that acts as the brain of the computer, handling many operations.
A multi-core CPU has more than one core in the space. it can perform hyper-threading and its speed is measured in GHz.
Hard Drive
The Hard Drive handles all storage of all data or files within the computer.
RAM
The Random Access Memory handles all working data or volatile data. it often times comes in a stick shape and is green most of the time, as well as having gold teeth running across the bottom. There are a few different kinds of RAM such as SIMM - Single In-line Memory Module, which only has the teeth running on one side, and DIMM - Dual In-line Memory Module, which has teeth running on both sides. There are also DDR RAM - Double Data Rate, with the faster versions also, DDR2 and DDR3.
GPU
The Graphics Processing Unit handles all graphics being loaded up.
Motherboard
The Motherboard connects all parts of the computer together. Also known as the system board.
CPU
The Central Processing Unit that acts as the brain of the computer, handling many operations.
A multi-core CPU has more than one core in the space. it can perform hyper-threading and its speed is measured in GHz.
The Hard Drive handles all storage of all data or files within the computer.
RAM
The Random Access Memory handles all working data or volatile data. it often times comes in a stick shape and is green most of the time, as well as having gold teeth running across the bottom. There are a few different kinds of RAM such as SIMM - Single In-line Memory Module, which only has the teeth running on one side, and DIMM - Dual In-line Memory Module, which has teeth running on both sides. There are also DDR RAM - Double Data Rate, with the faster versions also, DDR2 and DDR3.
GPU
The Graphics Processing Unit handles all graphics being loaded up.
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