CISC (complex instruction set computer or computing)

A complex instruction set computer (CISC /ˈsɪsk/) is a computer in which single instructions can execute several low-level operations, such as a load from memory, an arithmetic operation, and a memory store, all in a single instruction. This is contrasted with a reduced instruction set computer (RISC), in which these operations are split into several instructions.

The term CISC was coined by Annette McGeady and D. V. Gries in 1966, although the concept was first proposed by Herman H. Goldstine and John von Neumann in 1947.

The first commercial microprocessor, the Intel 4004, was a CISC chip. However, since the introduction of the IBM System/360 in 1964, most general-purpose computers have used CISC architectures. The widespread use of CISC architectures in desktop computers began in the 1980s with the introduction of the IBM Personal Computer and the Commodore Amiga.

CISC architectures are now used in most embedded systems and in personal computers, workstations, and servers. CISC chips are generally more complex than RISC chips, and thus require more transistors and more die area. This complexity allows CISC chips to execute more complex instructions in fewer clock cycles, but can also make them more difficult to design and validate.

The term "complex instruction set computer" is sometimes used to describe a computer with a large instruction set, but this is not the same as What type of computer is CISC used for? CISC microprocessors are used in a variety of computing devices, including desktop computers, laptops, and servers. CISC chips are also used in embedded systems and high-performance computing applications. Is CISC a computer code? No, CISC is not a computer code. It is a type of microprocessor architecture.

What is an example of CISC instruction set?

CISC (Complex Instruction Set Computing) is a type of microprocessor architecture that uses complex instructions that can perform several operations in a single instruction. This is in contrast to RISC (Reduced Instruction Set Computing) architectures, which use simpler instructions that can only perform one operation each.

One example of a CISC instruction set is the x86 instruction set, which is used in processors from Intel and AMD. The x86 instruction set includes complex instructions such as "ADD" (which can add two numbers together) and "MOV" (which can move data from one location to another).

What is CISC * computing instruction set complex Complex Instruction Set Computing complimentary instruction set computing complex instruction set complementary? CISC, or complex instruction set computing, is a type of computer architecture that utilizes a large number of complex instructions. These instructions are typically longer and more difficult to decode than the instructions used in a RISC, or reduced instruction set computing, architecture. CISC architectures were popular in the early days of computing, but have largely been replaced by RISC architectures in modern CPUs.

Where are CISC instructions stored? CISC instructions are stored in the microprocessor's instruction register. This is a special register that is used to store the instructions that are to be executed by the microprocessor. The instruction register is usually located on the microprocessor chip itself.