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Memory. (What is memory. (All devices which have a micro-processor have…
Memory.
What is memory.
All devices which have a micro-processor have memory. Memory can store data and programs and it is used to store values currently in use by the computer.
A memory chip or a memory stick. will have a size which is normally given in either mega or giga bytes.
Memory access times are much faster than a hard drive. This is the biggest reason why a system must have memory installed.
Each block inside memory is numbered. This will start at 0 and go up in fixed sizes until it gets to the end. For example a 1GB memory chip will contain about 270,000,000 memory blocks.
RAM.
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RAM is volatile. This means that when it is switched off it get wiped. So if you save your work on to RAM it will be wiped from the computer if turned off or if the computer loses power.
ROM.
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If the ROM gets wiped then it would be impossible to start the computer. This is why it is read only.
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Types of memory.
Flash memory is very special memory as it retains its contents when there is no power supplied. Flash memory is used in portable devices such as cameras and phones.
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Memory sticks use flash memory to allow you to save and store data. Devices like memory sticks are called solid state devices
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