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  2. Read-only memory - Wikipedia

    en.wikipedia.org/wiki/Read-only_memory

    Mask ROM consists of a grid of word lines (the address input) and bit lines (the data output), selectively joined with transistor switches, and can represent an arbitrary look-up table with a regular physical layout and predictable propagation delay. Mask ROM is programmed with photomasks in photolithography during semiconductor manufacturing.

  3. 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.

  4. Random-access memory - Wikipedia

    en.wikipedia.org/wiki/Random-access_memory

    Writable variants of ROM (such as EEPROM and NOR flash) share properties of both ROM and RAM, enabling data to persist without power and to be updated without requiring special equipment. ECC memory (which can be either SRAM or DRAM) includes special circuitry to detect and/or correct random faults (memory errors) in the stored data, using ...

  5. Rom - Wikipedia

    en.wikipedia.org/wiki/Rom

    Rom, Afghanistan, a village in Sar-e Pol province, Afghanistan; Rom, Deux-Sèvres, a commune in the Deux-Sèvres department in western France; Rom (Mecklenburg), a community in the district of Parchim, Mecklenburg-Vorpommern, Germany; Rom, a district of Morsbach in North Rhine-Westphalia, Germany; Rom, Iran, a village in South Khorasan Province ...

  6. Core rope memory - Wikipedia

    en.wikipedia.org/wiki/Core_rope_memory

    Core rope memory is a form of read-only memory (ROM) for computers.It was used in the UNIVAC I (Universal Automatic Computer I) and the UNIVAC II, developed by the Eckert-Mauchly Computer Corporation in the 1950s, as it was a popular technology for program and data storage in that era.

  7. Static random-access memory - Wikipedia

    en.wikipedia.org/wiki/Static_random-access_memory

    Static random-access memory (static RAM or SRAM) is a type of random-access memory (RAM) that uses latching circuitry (flip-flop) to store each bit. SRAM is volatile memory; data is lost when power is removed.

  8. 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 ...

  9. Non-volatile random-access memory - Wikipedia

    en.wikipedia.org/wiki/Non-volatile_random-access...

    Non-volatile random-access memory (NVRAM) is random-access memory that retains data without applied power. This is in contrast to dynamic random-access memory (DRAM) and static random-access memory (SRAM), which both maintain data only for as long as power is applied, or forms of sequential-access memory such as magnetic tape, which cannot be randomly accessed but which retains data ...