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  2. Read-only memory - Wikipedia

    en.wikipedia.org/wiki/Read-only_memory

    Read-only memory (ROM) is a type of non-volatile memory used in computers and other electronic devices. Data stored in ROM cannot be electronically modified after the manufacture of the memory device. Read-only memory is useful for storing software that is rarely changed during the life of the system, also known as firmware.

  3. Programmable ROM - Wikipedia

    en.wikipedia.org/wiki/Programmable_ROM

    It is one type of read-only memory (ROM). PROMs are used in digital electronic devices to store permanent data, usually low level programs such as firmware or microcode. The key difference from a standard ROM is that the data is written into a ROM during manufacture, while with a PROM the data is programmed into them after manufacture. Thus ...

  4. Boot ROM - Wikipedia

    en.wikipedia.org/wiki/Boot_ROM

    Boot ROM is a piece of read-only memory (ROM) that is used for booting a computer system. [1] It contains instructions that are run after the CPU is reset to the reset vector , and it typically loads a bootloader .

  5. Non-volatile memory - Wikipedia

    en.wikipedia.org/wiki/Non-volatile_memory

    Other examples of non-volatile memory include read-only memory (ROM), EPROM (erasable programmable ROM) and EEPROM (electrically erasable programmable ROM), ferroelectric RAM, most types of computer data storage devices (e.g. disk storage, hard disk drives, optical discs, floppy disks, and magnetic tape), and early computer storage methods such ...

  6. Firmware - Wikipedia

    en.wikipedia.org/wiki/Firmware

    Firmware is found in a wide range of computing devices including personal computers, smartphones, home appliances, vehicles, computer peripherals and in many of the integrated circuits inside each of these larger systems. Firmware is stored in non-volatile memory – either read-only memory (ROM) or programmable memory such as EPROM, EEPROM, or ...

  7. BIOS - Wikipedia

    en.wikipedia.org/wiki/BIOS

    In a valid expansion ROM, this signature is followed by a single byte indicating the number of 512-byte blocks the expansion ROM occupies in real memory, and the next byte is the option ROM's entry point (also known as its "entry offset"). If the ROM has a valid checksum, the BIOS transfers control to the entry address, which in a normal BIOS ...

  8. Booting - Wikipedia

    en.wikipedia.org/wiki/Booting

    The computer first executes a relatively small program stored in read-only memory (ROM, and later EEPROM, NOR flash) which support execute in place, to initialize CPU and motherboard, to initialize the memory (especially on x86 systems), to initialize and access the storage (usually a block-addressed device, e.g. hard disk drive, NAND flash ...

  9. ROM image - Wikipedia

    en.wikipedia.org/wiki/ROM_image

    Intelligent Systems ROM burner for the Nintendo DS. A ROM image, or ROM file, is a computer file which contains a copy of the data from a read-only memory chip, often from a video game cartridge, or used to contain a computer's firmware, or from an arcade game's main board.