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There are two types of built-in memory. Non-Volatile Memory &Volatile Memory
The CPU contains the logic& circuitry to run the computer. The CPU does contain registers for data & instructions, but these are small areas that can hold only a few bytes at a time. Also the storage in registers are temporary in nature.
In addition to the registers, the CPU needs to have millions of bytes space where it can store whole programs. The memory we are talking have consist of some chips either on motherboard or on a small circuit board attached to the motherboard. This built in memory allows the CPU to store & retrieve data very quickly. This built in memory is called as main memory. Primary storage media such as semiconductor storage chips are called Direct access or Random access memories (RAM).It means that an element of data or instruction can be directly stored & retrieved by selecting & using any of the locations on the storage media.
The Primary storage of memory modern computers consists of microelectronics semiconductor storage circuits. Millions of semiconductor storage circuits can be etched on LSI circuit chips. One major disadvantage of semiconductor memory is its nature of volatile i.e. it tends to lose the contents stored when the computer's power is shut off. |
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