Microprogramming

Microcode is a processor design technique that interposes a layer of computer organization between the CPU hardware and the programmer-visible instruction set architecture of the computer. As such, the microcode is a layer of hardware-level instructions that implement higher-level machine code instructions or internal state machine sequencing in many digital processing elements. Microcode is used in general-purpose central processing units, although in current desktop CPUs, it is only a fallback path for cases that the faster hardwired control unit cannot handle.Microcode typically resides in special high-speed memory and translates machine instructions, state machine data or other input into sequences of …

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