BTEC National. Unit 2 Computer Systems. Overview of operating system functions . 4. 3. 5. 2. 1. Operating system functions 1. At the very heart of the PC s the actual hardware (layer 1). All other layers act as an interface between the twp layers each side of them.
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Unit 2 Computer Systems
At the very heart of the PC s the actual hardware (layer 1). All other layers act as an interface between the twp layers each side of them.
Layer 2 is software that drives the hardware, saving and retrieving data on disk drivers, etc.
Layer 3 is called the kernel. It controls the applications in layer 4 and makes sure there are no conflicts between the applications, e.g. in their requests for data from a disk or sending data to a printer.
Layer 4 comprise the applications software. The ones you want to use are loaded into memory and run by the operating system.
Layer 5, is the user interface, sometimes called the HCI(Human Computer Interface), what you see when you look at the screen, and how things that you key are dealt with.
You need to use various computer operations on a proprietary operating system.
If you are working on a Windows system, much of the information that the operating system uses can be accessed through the control panel.
When an operating system is first installed, a number of settings are present at default values, and one of these is the configuration.
The system assumes a standard keyboard, standard mouse, etc. so if a user connects a special mouse or a higher resolution screen, telling the operating system is called configuring.
Other default values relate to how the interface between the computer and the user will operate, such as the background colour on the screen or security options such as passwords.