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Definition of MICROPROGRAMMING
: the use of routines stored in memory rather than specialized circuits to control a device (as a computer)
First Known Use of MICROPROGRAMMING
Process of writing microcode for a microprocessor. Microcode is low-level code that defines how a microprocessor should function when it executes machine-language instructions. Typically, one machine-language instruction translates into several microcode instructions. On some computers, the microcode is stored in ROM and cannot be modified; on some larger computers, it is stored in EPROM and therefore can be replaced with newer versions.