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Microcode is a type of computer instruction that is used to control processors. It is typically written in a special type of microprocessor language and is embedded in the hardware of the processor. Microcode is used to control the sequence of operations that are performed by the processor, and to implement specific features of the processor. It is usually not visible to programmers, who use high-level languages to write programs. Microcode is used in a variety of processors, including those used in personal computers, servers, and embedded systems. It is also used in some types of application-specific integrated circuits (ASICs). In general, microcode is more flexible than hardware, but it is also more difficult to design and debug. Microcode is usually updated by the manufacturer of the processor, in order to fix bugs or add new features. In some cases, it is possible for users to update the microcode on their own processors. This is usually done by downloading a file from the manufacturer's website and then using a special program to update the microcode. Some processors, such as the Intel Pentium, use a form of microcode called micro-operations. Micro-operations are small, atomic instructions that are used to implement complex operations. For example, a micro-operation might be used to add two numbers, or to compare two numbers. Microcode is an important part of modern processors, and is used to implement a variety of features. It is usually not visible to programmers, who use high-level languages to write programs. However, it is possible for users to update the microcode on their own processors, in order to fix bugs or add new features.