Acpi x86 based pc mobile7/9/2023 The conceptual developments of the RISC computer architecture began with the IBM 801 project in the late 1970s, but these were not immediately put into use. The design of the CPU allows RISC computers few simple addressing modes and predictable instruction times that simplify design of the system as a whole. The RISC computer usually has many (16 or 32) high-speed, general-purpose registers with a load/store architecture in which the code for the register-register instructions (for performing arithmetic and tests) are separate from the instructions that grant access to the main memory of the computer. The key operational concept of the RISC computer is that each instruction performs only one function (e.g. The goal is to offset the need to process more instructions by increasing the speed of each instruction, in particular, implementing an instruction pipeline may be simpler given simpler instructions. Unlike the instructions given to a complex instruction set computer (CISC), with a RISC computer, a task might require more instructions (code) in order to realise a task, because the individual instructions are written in simpler code. In computer engineering, a reduced instruction set computer ( RISC) is a computer designed to simplify the individual instructions given to the computer in order to realise a task. The Sun Microsystems UltraSPARC processor is a type of RISC microprocessor.
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