Reduced Instruction Set Computer (RISC)
The CISC microprocessors have the instruction built into the microprocessor. These instruction take up space in the microprocessor and leave less space for program processing. Some microprocessor perform specific tasks, such as those used for performing scientific calculation. The extra instructions built into the microprocessor take up valuable space in the microprocessor. The processing time taken to execute the extra instruction is also wasted.
To overcome these problem, a new architecture called RISC came into picture. The microprocessors using RISC architecture have limited instruction built into it. This requires few transistors to be built into the microprocessor to make up for the time delay in processing the instruction . The reduction in instructions also saves the space in the microprocessor. The RISC microprocessor is cheaper to build than the CISC processor. This processor is favorable for scientific purposes where limited instruction are required.
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