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HARDWARE AND OPERATING SYSTEM (SOFTWARE AND OPERATING SYSTEM Screenshot…
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microprocessor Computer history is very closely linked to the development of the integrated circuits or chips. The microprocessor is an integrated circuit made up of million of tiny transistors working toguether to process the instructions adn data received from the memory.
RAM The computer's main memory is its RAM(random access memory). When we run an application, its intrusctions and data are copied to this memory so that the microprocessor can use them. This is because accessing the herd disk is very slow.
cache memory RAM cannot work at the same speed as the microprocessor, so a much faster memory is installed between the RAM and microprocesor: the cache memory
ROM BIOS When you turn on your computer, it automatically checks the system. This initial check is carried out using instructions stores in a special read only memory: the ROM BIOS
storage devices The RAM stores data temporarily. When you turn off the computer, this data disappears. We use data storage units to permanently save this data
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CONNECTING EXTERNAL DEVICES
We can physicaly connect devices to the computer in differents ways:
sound card or a graphics card
hard disk, DVD drives
FUNCTIONS OF OPERATING SYSTEM -Manages the microporcesor. If several appplications are open at the same time, it calculates how much time the microprocesor should give to each one.
-Manages the memory and storage system
-Provides an interface or working enviroment
-communication between applications and peripheral devices.
