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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.
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 ...
System memory is one of the mapping options, another would typically be main firmware in flash. In this case, firmware is supposed to do all the jobs boot ROMs do; part of the firmware could act as a bootloader similar to ST's boot ROM. Hardware could provide read-only enforcement on the boot area, turning it into a user-provided version of ...
A computer program memory can be largely categorized into two sections: read-only and read/write. This distinction grew from early systems holding their main program in read-only memory such as Mask ROM, EPROM, PROM or EEPROM. As systems became more complex and programs were loaded from other media into RAM instead of executing from ROM, the ...
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 ...
An EPROM (rarely EROM), or erasable programmable read-only memory, is a type of programmable read-only memory (PROM) chip that retains its data when its power supply is switched off. Computer memory that can retrieve stored data after a power supply has been turned off and back on is called non-volatile .
A mask work registration on the ROM that contains the binary. Ordinary copyright law applies to the underlying software (source, binary) and original characters and art. But the expiration date for the term of additional exclusive rights in a work distributed in the form of a mask ROM would depend on an as yet [update] untested interpretation ...
The term "memory" is also often used to refer to non-volatile memory, specifically flash memory. It has origins in read-only memory (ROM). Programmable read-only memory (PROM) was invented by Wen Tsing Chow in 1956, while working for the Arma Division of the American Bosch Arma Corporation.