Sur cette page, vous pouvez obtenir une analyse détaillée d'un mot ou d'une phrase, réalisée à l'aide de la meilleure technologie d'intelligence artificielle à ce jour:
общая лексика
микропрограмма
внутренняя программа процессора, состоящая из последовательность микрокоманд. Каждой машинной команде соответствует своя выполняющая её микропрограмма. Термин предложен Морисом Уилксом (M.V. Wilks) в 1951 г. в статье "The best way to design an automatic calculating machine", но реализовано микропрограммное управление было впервые лишь в 1965 г. в семействе IBM System/360
синоним
Смотрите также
[maikrə(u)'prəugræmiŋ]
общая лексика
микропрограммирование
написание микропрограмм
Смотрите также
существительное
вычислительная техника
микропрограммирование
программирование в микрокоде
['maikrə(u)kəudiŋ]
синоним
In processor design, microcode is a technique that interposes an intermediate layer between the central processing unit (CPU) hardware and the programmer-visible instruction set architecture of a computer.
Microcode is a layer of hardware-level instructions that implement higher-level machine code instructions or internal finite-state machine sequencing in many digital processing elements. Microcode is used in general-purpose central processing units, although in current desktop CPUs, it can be 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 detailed circuit-level operations. It separates the machine instructions from the underlying electronics so that instructions can be designed and altered more freely. It also facilitates the building of complex multi-step instructions, while reducing the complexity of computer circuits. Writing microcode is often called microprogramming and the microcode in a particular processor implementation is sometimes called a microprogram.
More extensive microcoding allows small and simple microarchitectures to emulate more powerful architectures with wider word length, more execution units and so on, which is a relatively simple way to achieve software compatibility between different products in a processor family.
Some hardware vendors, especially IBM/Lenovo, use the term microcode as a synonym for firmware. In that way, all code within a device is termed microcode regardless of it being microcode or machine code; for example, hard disk drives are said to have their microcode updated, though they typically contain both microcode and firmware.