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IA-32 (short for "Intel Architecture, 32-bit", commonly called i386) is the 32-bit version of the x86 instruction set architecture, designed by Intel and first implemented in the 80386 microprocessor in 1985.
The Intel® 64 and IA-32 architectures software developer's manuals are now available for download via one combined volume, a four-volume set, or a ten-volume set. All content is identical in each set; see details below.
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Intel® 64 and IA-32 Architectures Software Developer’s Manual Volume 1: Basic Architecture NOTE: The Intel® 64 and IA-32 Architectures Software Developer's Manual consists of nine volumes: Basic Architecture, Order Number 253665; Instruction Set Reference A-L, Order Number 253666;
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Oct 8, 2019 · IA-32 is a 32-bit ISA based on the original 16-bit 8086 architecture. Many of its instructions are 8086 instructions with extended operand size (from 16-bits up to 32-bits). However original 16-bit instructions are staying a part of 32-bit ISA.
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NOTE: The IA-32 Intel Architecture Software Developer’s Manual consists of three volumes: Basic Architecture , Order Number 245470-012; Instruction Set Reference, Order Number 245471-012; and the System
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