The information in ROM is generally written and processed by the computer manufacturer, and cannot be modified by the user. ROM works in a non-destructive readout mode, and can only read information but not write it; once the information is written, it is fixed, and the information will not be lost even if the power is cut off.
The operating environment of this tutorial: Windows 7 system, Dell G3 computer.
ROM The contents of Read-Only Memory (ROM) are written using special methods when manufactured by the manufacturer, or require a special writer to write. When the computer is powered off, the information in the ROM will not be lost.
ROM works in a non-destructive reading mode and can only read information but cannot write information. 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.
The characteristic of read-only memory is that it can only read information but cannot write information. Usually, a basic input/output system is solidified in the ROM of the computer motherboard, called BIOS (Basic Input Output System). Its main function is to complete the power-on self-test of the system, initialization of each functional module in the system, basic input/output driver of the system and boot operating system.
There are many types of ROM, and each type of read-only memory has its own characteristics and scope of application. According to its manufacturing process and function, there are five types of ROM, namely mask-programmed read-only memory MROM (Mask-programmed ROM), programmable read-only memory PROM (Programmable ROM), erasable and programmable read-only memory Memory EPROM (Erasable Programmable ROM), electrically erasable programmable read-only memory EEPROM (Electrically Erasable Programmable ROM) and flash erasable read-write memory (Flash Memory).
For more related knowledge, please visit theFAQcolumn!
The above is the detailed content of Who wrote the information in the rom?. For more information, please follow other related articles on the PHP Chinese website!