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Minimal instruction set computer (MISC) is a central processing unit (CPU) architecture, usually in the form of a microprocessor, with a very small number of basic operations and corresponding opcodes, together forming an instruction set. Such sets are commonly stack-based rather than register-based to reduce the size of operand specifiers.
An instruction set architecture (ISA) is an abstract model of a computer, also referred to as computer architecture.A realization of an ISA is called an implementation.An ISA permits multiple implementations that may vary in performance, physical size, and monetary cost (among other things); because the ISA serves as the interface between software and hardware.
The focus on "reduced instructions" led to the resulting machine being called a "reduced instruction set computer" (RISC). The goal was to make instructions so simple that they could easily be pipelined, in order to achieve a single clock throughput at high frequencies. This contrasted with CISC designs whose "crucial arithmetic operations and ...
The first was the CISC (Complex Instruction Set Computer), which had many different instructions. In the 1970s, however, places like IBM did research and found that many instructions in the set could be eliminated. The result was the RISC (Reduced Instruction Set Computer), an architecture that uses a smaller set of instructions.
Comparison of instruction set architectures; Complex instruction set computer; Instruction set architecture; Millicode; Orthogonal instruction set; Reduced instruction set computer; Very long instruction word
A compressed instruction set, or simply compressed instructions, are a variation on a microprocessor's instruction set architecture (ISA) that allows instructions to be represented in a more compact format. In most real-world examples, compressed instructions are 16 bits long in a processor that would otherwise use 32-bit instructions.
Ignite (formerly ShBoom and PSC 1000, stylized as IGNITE) is a two stack, stack machine reduced instruction set computer (RISC) microprocessor architecture. [1] The architecture was originally developed by Russell H. Fish III and Chuck H. Moore, Nanotronics, which was later acquired by Patriot Scientific Corporation. The processor is one of the ...
RISC-V – an open-source hardware instruction set architecture ; MIPS – a reduced instruction set computer (RISC) instruction set architecture; Color Maximite – open-source single-board computer running the BASIC language as its operating system and compatible with Arduino Uno micro-controller peripherals; Humane Reader and Humane PC