Instruction set architecture
<architecture> (ISA) The parts of a processor's design that need to be understood in order to write assembly language, such as the machine language instructions and registers. Parts of the architecture that are left to the implementation, such as number of superscalar functional units, cache size and cycle speed, are not part of the ISA.
The definition of SPARC, for example, carefully distinguishes between an implementation and a specification.
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| Instruction Address Register instruction mnemonic instruction prefetch instruction scheduling instruction set | instruction set ISA PowerPC Scalable Processor ARChitecture stack | Instruction Set Processor instrument int INTCODE integer |
