What components does main memory include?

Main memory is an important component of computer hardware. It mainly consists of five parts: memory bank, control circuit, address register, data register and address decoding circuit. Its function is to store instructions and data, and can be controlled by the central Processor (CPU) direct random access.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

Main memory (Main memory), referred to as main memory. It is an important component of computer hardware. Its function is to store instructions and data, and can be directly accessed randomly by the central processing unit (CPU).

Main memory stores information according to address, and the access speed generally has nothing to do with the address. A 32-bit (bit) address can express a maximum memory address of 4GB. This is sufficient for most applications, but it is not enough for some extremely computationally intensive applications and extremely large databases, which requires a 64-bit structure.

Main memory generally uses semiconductor memory. Compared with auxiliary memory, it has the characteristics of small capacity, fast reading and writing speed, and high price. The main memory in the computer is mainly composed of five parts: memory bank, control circuit, address register, data register and address decoding circuit.

Main memory generally refers to ROM and RAM.

• # Random access memory (RAM) can both store information into and read out information from designated units. Any information stored in RAM will be lost when the power is turned off, so RAM is volatile memory.

• Read-only memory (ROM) works in a non-destructive read-out mode and can only read information but cannot write it. Once the information is written, it is fixed and will not be lost even if the power is turned off, so it is also called fixed memory. The data stored in ROM is usually written before being loaded into the whole machine. It can only be read out during the operation of the whole machine. Unlike random access memory, the stored content can be rewritten quickly and conveniently. The data stored in ROM is stable and will not change after a power outage. It has a simple structure and is easy to use, so it is often used to store various fixed programs and data.

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