IBM’s RISC-based processors have been used in servers and routers, engines, jet control systems and even spacecraft — an IBM Power processor was used in the onboard computer of NASA’s Mars Pathfinder from 1996 to 1997. IBM also uses RISC-based processors in all of its supercomputers.

The RISC System/6000 (RS/6000) is a family of RISC -based (Reduced Instruction Set Computer-based) Unix servers, workstations and supercomputers made by IBM in the 1990s. The RS/6000 family replaced the IBM RT PC computer platform in February 1990 and is the first computer line to see the use of IBM's POWER and PowerPC based microprocessors.

In the early 1980s various projects at the IBM Thomas J. Watson Research Center examined aspects of high- performance Reduced Instruction-Set Computer (RISC) designs. From earlier work [3] based on the experimental 80 1 computer, it was clear that RISC processors offered many advantages over conventional CISC (Complex

RISC engine based on the new IBM POWER architecture. It combines this powerful RISC architecture with sophisticated hardware-design techniques to achieve a short cycle time and a low cycles-per-instruction (CPI) ratio. Like earlier RISC processors, the RS/6000 system employs a simple register-oriented instruction set, the

Oct 4, 2022 · The IBM 801 had all the main features of a RISC architecture: a number of processor registers used for all computation, no complex addressing modes, one load, and one store instruction. It was initially 24-bit, but soon that was upgraded to 32-bits.

IBM introduces in January the RT Personal Computer line of high-speed workstations intended for technical professionals. The RT is the first workstation to use Reduced Instruction Set Computer (RISC) architecture originated by IBM researchers.

The RISC System/6000* family is based on the new IBM POWER (Performance Optimization With Enhanced RISC) architecture; the hardware implementation takes advantage of this powerful RISC architecture and employs sophisticated design techniques to achieve a short cycle time and a low cycles-per-instruction (CPI) ratio.

This paper traces the evolution of IBM RISC architecture from its origins in the 1970s at the IBM Thomas J. Watson Research Center to the present-day IBM RISC System/6000* computer. The acronym RISC, for Reduced Instruction-Set Computer, is used in this paper to describe the 801 and subsequent architectures.

The IBM RISC System/6000 realizes the idea of a superscalar microprocessor. The architecture of this processor has its instruction set specifically designed for a superscalar machine containing three independent units—branch, fixed-point, and floating-point.

IBM RISC System/6000 processor architecture by R. R. Oehler R. D. Groves This paper describes the hardware architecture of the IBIVI RISC System/6000* processor, which combines basic RISC principles with a partitioning of registers by function into multiple ALUs. This allows a high degree of parallelism in