摘要: This paper traces the evolution of IBM RISC architecture from its origins in 1970s at Thomas J. Watson Research Center to present-day System/6000* computer. The acronym RISC, for Reduced Instruction-Set Computer, is used this describe 801 and subsequent architectures. However, context does not strictly imply a reduced number instructions, but rather set primitives carefully chosen exploit fastest component storage hierarchy provide instructions that can be generated easily by compilers. We how these goals were embodied they have since evolved on basis experience new technologies. effect illustrated with results several benchmark tests CPU performance.