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The predecessor of the 80386 was the Intel 80286, a 16-bit processor with a segment-based memory management and protection system. The 80386 added a three-stage instruction pipeline which it brought up to total of 6-stage instruction pipeline, extended the architecture from 16-bits to 32-bits, and added an on-chip memory management unit. [21]
IA-32 (short for "Intel Architecture, 32-bit", commonly called i386 [1] [2]) [3] is the 32-bit version of the x86 instruction set architecture, designed by Intel and first implemented in the 80386 microprocessor in 1985.
The 80386 had an optional floating-point coprocessor, the 80387; it had eight 80-bit wide registers: st(0) to st(7), [33] like the 8087 and 80287. The 80386 could also use an 80287 coprocessor. [34] With the 80486 and all subsequent x86 models, the floating-point processing unit (FPU) is integrated on-chip.
The boards allowed users to upgrade their machines' CPU to a 16 MHz 80386 processor. Both variants utilized a ribbon cable which plugged into the computer's original CPU socket on one end and into a socket on the Inboard card on the other end. Both boards were full-length ISA expansion cards and occupied one slot.
The 8088 version, with an 8-bit bus, was used in the original IBM Personal Computer. 186 included a DMA controller, interrupt controller, timers, and chip select logic. A small number of additional instructions. The 80188 was a version with an 8-bit bus. 286 first x86 processor with protected mode including segmentation based virtual memory ...
The x86 instruction set refers to the set of instructions that x86-compatible microprocessors support. The instructions are usually part of an executable program, often stored as a computer file and executed on the processor. The x86 instruction set has been extended several times, introducing wider registers and datatypes as well as new ...
An Intel i386 EX embedded processor inside a Garmin GPS III+. The Intel 80386EX (386EX) is a variant of the Intel 386 microprocessor designed for embedded systems.Introduced in August 1994 and was successful in the market being used aboard several orbiting satellites and microsatellites.
Russian VLIW processor family, designed to run x86 code using dynamic binary translation. Space Electronics Inc. / Maxwell: 80386DXRP: Intel 386 CPUs repackaged in special radiation-hardened packages for use in space. [32] [33] Kombinat Mikroelektronik Erfurt: U80601: East Germany 80286 clone, made in 1989-1990. Eagle Memories, [34] MC [35] 486DLC