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Intel i860
The Intel i860 (also known as 80860) was a RISC microprocessor design introduced by Intel in 1989. It was one of Intel's first attempts at an entirely new, high-end instruction set architecture since the failed Intel i432 from the 1980s. It was released with considerable fanfare, slightly obscuring the earlier Intel i960, which was successful in some niches of embedded systems, and which many considered to be a better design. The i860 never achieved commercial success and the project was terminated in the mid-1990s.
==Implementations==
The first implementation of the i860 architecture was the i860 XR microprocessor (code named N10), which ran at 25, 33, or 40 MHz. The second-generation i860 XP microprocessor (code named N11) added 4 Mbyte pages, larger on-chip caches, second level cache support, faster buses, and hardware support for bus snooping, for cache consistency in multiprocessor systems. A process shrink for the XP (from 1 micrometre to 0.8 CHMOS V) bumped it to 40 and 50 MHz.〔(The i860 XP - Second Generation of the i860. )〕 Both microprocessors supported the same instruction set for application programs.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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