When was the information in the rom written?
The information in the ROM is pre-written by the manufacturer.
Read-only memory is a memory that can only be read but cannot write information at will. The content in the ROM is written by the manufacturer using a special method, or requires a special writer to write. When the computer is powered off, the information in the ROM will not be lost.
ROM:
Read-Only Memory (Read-Only Memory) is a kind of memory that can only read data. During the manufacturing process, data is burned into the circuit with a special mask. The data content cannot be changed after writing, so it is sometimes called "mask read-only memory" (mask ROM).
The manufacturing cost of this memory is low. It is often used for startup in computers such as boot CDs. When the system is installed on the computer, the computer reads the operating system files in the C drive directory into the memory, and then Various accessories are called through the CPU to perform work. At this time, the system stores the memory as RAM. This type of CD is a COMPACT DISC laser disc, which is what CDs are like.
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