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A one-instruction set computer (OISC), sometimes referred to as an ultimate reduced instruction set computer (URISC), is an abstract machine that uses only one instruction – obviating the need for a machine language opcode.
The Berkeley project became known as the Reduced Instruction Set Computer (RISC), and the result was the development of single-chip microprocessors. The technology — novel, even counter-intuitive at the time — was led by Patterson and fellow computer science professor Carlo Séquin.
A reduced instruction set computer (RISC) simplifies the processor by efficiently implementing only the instructions that are frequently used in programs, while the less common operations are implemented as subroutines, having their resulting additional processor execution time offset by infrequent use.
The exchange controller project may have been canceled before it got off the ground, but the team’s underlying work led to the microprocessor architecture called RISC, for reduced instruction set computer. RISC enabled computers to complete tasks using simplified instructions, as quickly as possible.
Berkeley RISC is one of two seminal research projects into reduced instruction set computer (RISC) based microprocessor design taking place under the Defense Advanced Research Projects Agency VLSI Project. RISC was led by David Patterson (who coined the term RISC) at the University of California, Berkeley between 1980 and 1984. [1] .
In electronics and computer science, a reduced instruction set computer (RISC) is a computer architecture designed to simplify the individual instructions given to the computer to accomplish tasks.
A complex instruction set computer ( CISC / ˈsɪsk /) is a computer architecture in which single instructions can execute several low-level operations (such as a load from memory, an arithmetic operation, and a memory store) or are capable of multi-step operations or addressing modes within single instructions. [citation needed] .
