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List of Intel processors
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===[[32-bit computing|32-bit]] processors: the 80386 range=== [[File:KL Intel i386DX.jpg|thumb|Intel 80386DX]] [[File:80386with387.JPG|thumb|Intel 80386DX with Intel 387 math processor]] ==== [[Intel 80386|80386DX]] ==== * Introduced October 17, 1985 * Clock rates: ** 16 MHz, 5 MIPS ** 20 MHz, 6 to 7 MIPS, introduced February 16, 1987 ** 25 MHz, 7.5 MIPS, introduced April 4, 1988 ** 33 MHz, 9.9 MIPS (9.4 SPECint92 on Compaq/i 16 KB L2), introduced April 10, 1989 * Data bus width: 32 bits, address bus: 32 bits * 275,000 transistors at 1 μm * Addressable memory 4 [[gigabyte|GB]] (4 × 1024{{sup|3}} B) * [[Virtual memory]] <!-- "up to"? --> 64 [[Terabyte|TB]] (64 × 1024{{sup|4}} B)<ref name="Ram2001">{{cite book|author=Badri Ram|title=Adv Microprocessors Interfacing|url=https://books.google.com/books?id=eVcEWDIeTYcC&pg=PT208|date=1 September 2001|publisher=Tata McGraw-Hill Education|isbn=978-0-07-043448-6|pages=208–}}</ref><ref>Rant, Jon; "Extending the Legacy of Leadership: The 80386 Arrives", Intel Corporation, Special 32-Bit Issue Solutions, November/December 1985, page 2</ref> * First x86 chip to handle [[32-bit computing|32-bit]] data sets * Reworked and expanded memory protection support including [[Paging|paged virtual memory]] and virtual-86 mode, features required at the time by [[Xenix]] and [[Unix]]. This memory capability spurred the development and availability of [[OS/2]] and is a fundamental requirement for modern operating systems like [[Linux]], [[Windows]], and [[macOS]] * First used by Compaq in the [[Compaq Deskpro 386|Deskpro 386]]. Used in desktop computing * Unlike the DX naming convention of the 486 chips, it had no math co-processor * Later renamed Intel386 DX ====[[Intel 80386SX|80386SX]]==== * Introduced June 16, 1988 * Clock rates: ** 16 MHz, 2.5 MIPS ** 20 MHz, 3.1 MIPS, introduced January 25, 1989 ** 25 MHz, 3.9 MIPS, introduced January 25, 1989 ** 33 MHz, 5.1 MIPS, introduced October 26, 1992 * 32-bit internal architecture * External data bus width: 16 bits * External address bus width: 24 bits * 275,000 transistors at 1 μm * Addressable memory 16 MB * Virtual memory 64 TB<ref name="Ram2001"/> * Narrower buses enable low-cost 32-bit processing * Used in entry-level desktop and portable computing * No math co-processor * No commercial software used protected mode or virtual storage for many years * Later renamed Intel386 SX ====[[Intel 80376|80376]]==== [[File:KL Intel i376.jpg|thumb|The Intel i376 is an embedded version of the i386SX.|alt=]] * Introduced January 16, 1989; discontinued June 15, 2001 * Variant of 386SX intended for embedded systems * No "real mode", starts up directly in "protected mode" * Replaced by much more successful [[#80386EX|80386EX]] from 1994 ====[[Intel 80386SL|80386SL]]==== * Introduced October 15, 1990 * Clock rates: ** 20 MHz, 4.21 MIPS ** 25 MHz, 5.3 MIPS, introduced September 30, 1991 * 32-bit internal architecture * External bus width: 16 bits * 855,000 transistors at 1 μm * Addressable memory 4 GB * Virtual memory 64 TB<ref name="Ram2001"/> * First chip specifically made for portable computers because of low power consumption of chip * Highly integrated, includes cache, bus, and memory controllers [[File:KL Intel i386EX.jpg|thumb|Intel 80386EX]] ====[[Intel 80386EX|80386EX]]==== * Introduced August 1994 * Variant of 80386SX intended for [[embedded system]]s * Static core (i.e. may run as slowly (and thus, power efficiently) as desired) down to full halt * On-chip peripherals: ** Clock and power management ** Timers/counters ** [[Watchdog timer]] ** Serial I/O units (sync and async) and parallel I/O ** [[Direct memory access|DMA]] ** RAM refresh ** [[JTAG]] test logic * Significantly more successful than the 80376 * Used aboard several orbiting satellites and microsatellites * Used in NASA's [[FlightLinux]] project
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