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What is ROM memory?

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Although it doesn't usually get as much attention as RAM and the processor, ROM memory is also one of the most critical components that make up a computer, as it is the PC's starting chain. I have more than the basic link. . Its mission is to save all the necessary parameters so that whenever we turn on the PC, it remembers how and how to do it, among other things.

This electronic component has been present in computer motherboards since its inception, but we can also find it in cell phones, tablets, and many other devices that require a boot routine. If you want to know everything about this electronic component of computers and telephones, do not hesitate to continue reading this post about ROM memory.

Where you will find detailed and comprehensive information on how to do it. You will find different types of ROM memory that are available and much more interesting about the subject.

What does Rome mean?

ROM stands for "Read Only Memory," which in our language means "Read Memory Only," and as its name suggests, it contains such information and instructions. Which can only be read, i.e., new things cannot be written. In such a memory, unlike the RAM memories, as we will see later in this post.

As we mentioned, ROM memory is a chip or integrated circuit capable of storing information inside, which cannot be changed, at least not by chance. Similarly, ROM memory can retain the data recorded in its circuits even when it does not generate power, i.e., when there is no power source to hold it, unlike RAM memories, which Lose control is absent Of its cells.

This makes the ROM highly efficient to start an electronic device such as a computer, smartphone, or any other machine that always has to be created this way because the data and boot routines inside it are ever stored there. And in the same condition in which they were safe. ( Also read what are the Best Ryzen Laptops for you).

What is ROM memory?

Room memory is an electronic component found in computers and portable devices such as cell phones, cell phones, and tablets. Still, we can also find it in smart TVs, audio players, and many other devices with the necessary storage function. Meet Data and instructions to boot the machine, i.e., usually start.

It should be noted that ROM can be written, but with unique methods like the one we use when we update the computer's BIOS to improve its functions, something that can be done these days easily. , And even most users encourage it—motherboard manufacturers.

ROM memory types

The memories used to store a device's boot routines are divided into programmable and those that are not. The second type, which consists of ROM memories and POR memories, is no longer used in computing because they are replaced by memories that can be overwritten, i.e., the first type of memories, which contain EPROM. And EEPROM memory.

Below these lines, we will learn the fundamental differences between ROM, PROM, EPROM, and EEPROM memories.

ROM function

Basically, inside devices, especially in the case of computers, the role played by ROM memory, all boot codes and instructions have to be kept safe and unchanged so that the PC can start every day and every time. Similarly.

One of the many tasks required to handle the PC boot process through ROM memory is to start the PC operating system, without which, as we know, a computer nowadays Very little will work. But besides, ROM is to perform all the initial analysis and checking of the memory system and perform multiple control routines of all input and output regions.

ROM (read memory only)

ROM (read-only memory) or read-only memory was the first type of memory that was developed, and to store information, a method was used which involved the use of silicone plates and masks. There was, therefore, no possibility of being able to do it manually. Room-like memories have been replaced by EPROM and EEPROM-type memories, which can be overwritten.

PRM (workable read-only memory)

Memories PRM (Program Readable Memory) or Program Read Only Memory is a mid-fifties military development. The most fantastic thing about this kind of memory is that recording data on the chip was performed. Application of voltage overload between 12 and 20 volts, up to diodes in integrated circuits, through a device known as "ROM programmer."

The chips came from the factory with all the diodes maintained, all matching the value of "1" - when they were overloaded, their value was "0". As we can see, it was not possible to do it manually. This type of POM memory was used, among others, in Sinclair ZX Spectrum computers.

It should be noted that the term used for this type of activity is "burn," which is derived from burning the diodes of these memories with voltage.

EPROM (Erasable Programmable Read-Only Memory)

EPROM type memories (Erasable Programmable Red Memory Only) or Programmable and Erasable Read Only Memory are PROM Type Memories, but in contrast, they offer the possibility of erasing the contents. Coins

Eprom memories are programmed by emitting ultraviolet light rays, which enter the circuit through a window in an integrated circuit in integration.

EEPROM (Power Readable Programmable Read-Only Memory)

EEPROM (Electric Erasable Programmable Readable Memory) Memories or electrically erasable programs like EPROM Memories are only memory-erasable, in addition to erasing and rewriting the memory easy because it has an electric current. Is used.

EEPROM Memories Flash offers a format called EEPROM, which uses fewer components, and can read registers one by one, and affecting chip performance.

Differences between ROM, EPROM, and Flash EEPROM

Although the term ROM is still used today, the fact is that things have changed a bit since the acronym "read-only" is no longer valid, as memories of this nature are used today. Can write more often and is quite an example of this when we update the BIOS

Let us remember that the term ROM came from when ROM memories left the factory with the data and instructions already entered, which should be following the tool in which they were to be installed. There was no possibility of being able to edit it—their content.

Currently, the term ROM is still used in traditional conventions, as new memories of this type have replaced the old ROMs in recent years, and thanks to which we practically do not find such a device in the market. I can still have an old ROM installed. , It can be written.

This type of ROM memory is called EPROM and Flash EEPROM. Although we have the knowledge, experience, and some software tools to edit its contents, the fact is that modern ROM memory editing content is routine. It's easy.

But the most important thing to remember is that unlike ROM memories, EPROM and Flash EEPROM memories can be written. That is, many times, new data can be recorded. This fact, for example, allows us to update the BIOS and take advantage of its unique features and our resources and procedures without any major hassle.

The difference between RAM and ROM

Two types of memory live together in a computer, RAM and ROM, each for a particular purpose. RAM memory, or random access memory, fulfills storing data used in the operating system and user usage. It is a much faster method than finding it directly on the hard disk.

Besides, RAM memory can be overwritten several times, but its contents, i.e., the data stored in it, are temporary, which means that they will be lost in case of power failure.


Conversely, in the event of a power failure, the content stored in the ROM memory is not deleted, as we have noted, making it an ideal subset of the computer's startup functions. Since it is not written yes, at least from simple sources and any user's hand, this guarantees that the device will always start this way.

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