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What is the difference between CISC and RISC?

Reuben Corwin ∙

Lvl 10

∙ 5y ago

Updated: 11/10/2022

RISC : Reduced Instruction Set Computer. A RISC system has a reduced number of instructions (making it easier to implement efficient optimizing compilers) and more importantly it is load store architecture where pipelining can be implemented easily. e.g. IBM PowerPC, ARM, Intel i960

CISC : Complex Instruction Set Computer. A CISC system has complex instructions (making it easier for a human to directly program in assembly language) such as direct addition between data in two memory locations. e.g. Intel Pentium (x86), DEC MicroVAX, Motorola 680x0

Annamarie Trantow ∙

Lvl 10

∙ 3y ago

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Pentium I processors are CISC.

Which two categories are used to classify CPU architecture?

CISC and RISC are the two categories that are used to classify CPU architecture. CISC is an acronym for complex instruction set computer.

8086 is risc or cisc based architecture?

The 8086/8088 is a CISC based architecture.

Please can someone give me the answera) Identify any FOUR 4 drawbacks of a CISC processor compared to a RISC processor?

In CISC, the instruction set is very large that can be used for complex operations while in RISC the instruction set is reduced, and most of these instructions are very primitive. CISC computer's execution time is very high whereas RISC computer's execution time is very less. In, CISC code expansion is not a problem while in RISC code expansion may create a problem. In CISC, decoding of instructions is complex whereas, in RISC, the decoding of instructions is simple. CISC requires external memory for calculations, but RISC requires external memory for calculations. CISC has only a single register set while RISC has multiple register sets are present.

Is 8051 a cisc or risc?

8051 is a CISC but having less number of instruction as comared to ARM which is RISC.CISC

What do RISC and CISC stand for?

CISC: Complex Instruction Set ComputerRISC: Reduced Instruction Set Computer

Which has less number of instruction risc or cisc?

RISC stands for Reduced Instruction Set Computer. The design strategy of a RISC processor includes limiting the number of instructions. This does not mean that ALL RISC processors have less instructions than ALL CISC processors, but in general, they do.

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