IBM 801 - definizione. Che cos'è IBM 801
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Cosa (chi) è IBM 801 - definizione

EXPERIMENTAL MINICOMPUTER

IBM 801         
The original IBM RISC processor, developed as a research project. It was named after the building in which it was designed. [Features? Dates?] (1995-03-01)
IBM 801         
The 801 was an experimental central processing unit (CPU) design developed by IBM during the 1970s. It is considered to be the first modern RISC design, relying on processor registers for all computations and eliminating the many variant addressing modes found in CISC designs.
IBM 4300         
  • IBM 4381
  • 3278-2A terminal]]
LINE OF IBM MAINFRAMES SOLD FROM 1979 THROUGH 1992
Ibm 4300 series; 43xx; IBM 4300 series; IBM 4381; 4381; IBM 4341; IBM ES/4381; IBM 4361; IBM 43xx
The IBM 4300 series are mid-range systems compatible with System/370 that were sold from 1979 through 1992. They featured modest electrical and cooling requirements, and thus did not require a data center environment.

Wikipedia

IBM 801

The 801 was an experimental central processing unit (CPU) design developed by IBM during the 1970s. It is considered to be the first modern RISC design, relying on processor registers for all computations and eliminating the many variant addressing modes found in CISC designs. Originally developed as the processor for a telephone switch, it was later used as the basis for a minicomputer and a number of products for their mainframe line. The initial design was a 24-bit processor; that was soon replaced by 32-bit implementations of the same concepts and the original 24-bit 801 was used only into the early 1980s.

The 801 was extremely influential in the computer market. Armed with huge amounts of performance data, IBM was able to demonstrate that the simple design was able to easily outperform even the most powerful classic CPU designs, while at the same time producing machine code that was only marginally larger than the heavily optimized CISC instructions. Applying these same techniques even to existing processors like the System/370 generally doubled the performance of those systems as well. This demonstrated the value of the RISC concept, and all of IBM's future systems were based on the principles developed during the 801 project.

For his work on the 801, John Cocke was recognized with several awards and medals, including the Turing Award in 1987, National Medal of Technology in 1991, and the National Medal of Science in 1994.