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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 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.
Both boards were full-length ISA expansion cards and occupied one slot. Each card came with 1MB of onboard memory as standard, included an 80386 processor, and included a socket for an 80387 math coprocessor. Originally, the Intel Board 386/AT offered board without memory and 1MB of memory for US$1,995 and US$2,495 respectfully. [1]
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.
The 80386 also introduced the two new segment registers FS and GS as well as the x86 control, debug and test registers. The new instructions introduced in the 80386 can broadly be subdivided into two classes: Pre-existing opcodes that needed new mnemonics for their 32-bit OperandSize variants (e.g. CWDE, LODSD)
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.
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.