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The Intel 386, originally released as the 80386 and later renamed i386, is the third-generation x86 architecture microprocessor from Intel. It was the first 32-bit processor in the line, making it a significant evolution in the x86 architecture. Pre-production samples of the 386 were released to select developers in 1985, while mass production ...
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 and its successors fully support the 16-bit segments of the 80286 but also segments for 32-bit address offsets (using the new 32-bit width of the main registers). If the base address of all 32-bit segments is set to 0, and segment registers are not used explicitly, the segmentation can be forgotten and the processor appears as having ...
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.
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.
original Itanium microarchitecture. Used only in the first Itanium microprocessors. McKinley enhanced microarchitecture used in the first two generations of the Itanium 2 microprocessor. Madison is the 130 nm version. Montecito enhanced McKinley microarchitecture used in the Itanium 2 9000- and 9100-series of processors.
In the 80386 microprocessor and later, virtual 8086 mode (also called virtual real mode, V86-mode, or VM86) allows the execution of real mode applications that are incapable of running directly in protected mode while the processor is running a protected mode operating system.
Windows 3.0 actually had several modes: "real mode", "standard mode" and "386-enhanced mode"; the latter required some of the virtualization features of the 80386 processor, and thus would not run on an 80286. Windows 3.1 removed support for real mode, and it was the first mainstream operating environment which required at least an 80286 processor.