What does mobile phone ROM mean?

ROM is composed of the first letter of English Read only Memory, which means read-only memory. As the name implies, such a memory can only be read, and cannot be read and written at any time like RAM. It only allows the opportunity to write once after it is produced. Data cannot be changed once it is written. Another characteristic of it is that the data inside the memory is not lost after being powered off, and can be stored for hundreds of years. The mobile phone ROM refers to the memory that stores the mobile phone firmware code (often referred to as the flash machine is also referring to the reconstruction of their own desired ROM), such as the phone's operating system, some applications such as games.

The ROM and RAM on the mobile phone and the ROM and RAM on the computer are all meant to be names of storage. Among them, the English name of ROM is read only memory, and the Chinese name is called read-only memory. In more general terms, ROM can be understood as the hard disk of a mobile phone, which allows us to store things in it. However, the ROM on the mobile phone and the hard disk we understand in general are somewhat different, because although the ROM on the mobile phone is capable of storing things, we can only read and cannot write in the general case, which is why it is called "only The reason for reading memory is that we can write to ROM only under certain professional conditions. In view of this particularity of ROM, many mobile phone system files are stored in the ROM of the mobile phone, so that under normal circumstances we can not modify the system file of the mobile phone, but at present, through some special means, we can also achieve ROM. Writing something, this is actually what we often call Brush.

A complete ROM root directory will have the following folders and files: data, META-IN, system, and boot. Img The four folders (data) are the directory where the user installs the application, and (META-IN) is the directory where the system-related information is located. Generally, a customized ROM is used to modify system version information. (system) is the directory where the system is located, which is equivalent to the PC system's Windows folder. (boot.img) is an image file, which is the so-called kernel kernel. It is usually used when migrating ROM.

The mobile phone ROM is a place where the mobile phone operating system is stored. Under normal circumstances, the security of the mobile phone system is not allowed to be erased. Therefore, the operating system stored in the ROM can only be read but cannot be changed and erased. However, in order to upgrade the system, it is possible to modify and erase the ROM through a program on the computer. Usually, the “brush machine” means to erase the ROM.