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The main content of this article is to explain "what to divide the memory into according to the different ways of working". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "what to divide the memory into according to the way you work".

According to the different working mode, memory can be divided into random read-write memory (RAM) and read-only memory (ROM). RAM memory is a semiconductor memory that can both read and write; the content of ROM memory is fixed, it is a semiconductor memory that can only be read but not written.

The operating environment of this tutorial: windows10 system, Dell G3 computer.

According to the mode of operation, the memory can be divided into

Read-only memory (ROM): semiconductor memory whose contents are fixed and can only be read but not written.

Random read-write memory (RAM): semiconductor memory that can both read and write.

Read-only memory (ROM)

Read-only memory (Read-Only Memory,ROM) operates in a non-destructive readout mode and can only read out information that cannot be written. Once the information is written, it is fixed, and even if the power is cut off, the information will not be lost, so it is also called fixed memory. The data stored in ROM is usually written before loading into the whole machine, and can only be read out during the working process of the whole machine, unlike random access memory (RAM), which can quickly and easily rewrite the storage content. The data stored in ROM is stable, and the data stored after power outage will not change, and the structure is simple and easy to use, so it is often used to store a variety of fixed programs and data.

The characteristic of read-only memory is that it can only read but not write information. It usually solidifies a basic input / output system called BIOS (basic input / output system) in the ROM of the computer motherboard. Its main function is to complete the power-on self-test of the system, the initialization of each functional module in the system, the basic input / output driver of the system and the boot operating system.

Random read-write memory (RAM)

Random access memory (Random Access Memory, abbreviation: RAM), also known as main memory, is an internal memory that exchanges data directly with CPU. It can be read and written at any time (except when refreshed), is fast, and is usually used as a temporary data storage medium for the operating system or other running programs. RAM can write (store) or read (read) information from any specified address at any time while working. The biggest difference between it and ROM is the volatility of data, that is, the data stored in the event of a power outage will be lost. RAM is used in computers and digital systems to temporarily store programs, data, and intermediate results.

Random access memory (RAM) can both store and read information from the designated unit. Any information stored in the RAM will be lost after a power outage, so the RAM is volatile memory.

ROM is a read-only memory, which not only stores data, tables and solidified programs, but also has a wide range of applications in combinational logic circuits.

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