Shulou(Shulou.com)06/03 Report--

In this issue, the editor will bring you about what distinguishes rom from ram. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article.

Introduction to 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.

Different types of read-only memories have different functions except that a few types of read-only memories (such as character generators) are universal. For the convenience of users and mass production, different kinds of programmable read-only memory (PROM), erasable programmable read-only memory (EPROM) and charged erasable programmable read-only memory (EEPROM) are further developed. ROM has a wide range of applications, such as the boot program (operating system) of early personal computers such as Apple II or IBM PC XT/AT, or the Firmware in other microcomputer systems, using ROM hardware.

Characteristics of rom

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.

Note: RAM (random access memory) is random storage memory, which will lose its storage content when power is off, so it is mainly used to store programs used for a short time.

The above is what distinguishes rom from ram that Xiaobian shares with you. If you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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