• 1985

Hardware Description

PRISM was a 32-bit RISC instruction set architecture (ISA) developed by Digital Equipment Corporation (DEC). It was the final outcome of a number of DEC research projects from the 1982–1985 time-frame, and was at the point of delivering silicon in 1988 when the management canceled the project. The next year work on the Alpha started, based heavily on the PRISM design.

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