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The '''80386''', also '''i386''' and '''386''', (pronounced ''eighty-three-eighty-six'') was a family of {{arch|32}} 3rd-generation [[x86]] microprocessors introduced by [[Intel]] in [[1985]] as a successor to {{intel|80286}}. These processors provided were fully backwards compatible with previous generations of x86 processors but introduced a number of major new features including enhancements to {{x86|protected mode}} and {{x86|virtual 8086 mode}}. The changes brought about by 386 became the standard for all future {{arch|32}} [[x86]] processors, dubbed [[IA-32|i386-architecture]].
 
The '''80386''', also '''i386''' and '''386''', (pronounced ''eighty-three-eighty-six'') was a family of {{arch|32}} 3rd-generation [[x86]] microprocessors introduced by [[Intel]] in [[1985]] as a successor to {{intel|80286}}. These processors provided were fully backwards compatible with previous generations of x86 processors but introduced a number of major new features including enhancements to {{x86|protected mode}} and {{x86|virtual 8086 mode}}. The changes brought about by 386 became the standard for all future {{arch|32}} [[x86]] processors, dubbed [[IA-32|i386-architecture]].
  
== Architecture ==
+
== History ==
 
{{empty section}}
 
{{empty section}}
  
 
== Members ==
 
== Members ==
 
=== Single-word eXternal ===
 
 
 
{| class="wikitable"
 
{| class="wikitable"
 
|-
 
|-
 
! Model !! Introduction !! Ext. Bus !! Frequency !! Notes
 
! Model !! Introduction !! Ext. Bus !! Frequency !! Notes
 
|-
 
|-
| {{\|80386SX-16}} || June 16, 1988 || 16-bit || 16 MHz ||
+
| {{\|80386-12}} || October 1985 || 32-bit || 12 MHz || rowspan="3" | Renamed with "DX" suffix upon the introduction of the "SX" version.
 
|-
 
|-
| {{\|80386SX-20}} || January 25, 1989 || 16-bit || 20 MHz ||
+
| {{\|80386-16}} || 1985 || 32-bit || 16 MHz  
 
|-
 
|-
| {{\|80386SX-25}} || January 25, 1989 || 16-bit || 25 MHz ||
+
| {{\|80386-20}} || February 1987 || 32-bit || 20 MHz  
 
|-
 
|-
| {{\|80386SX-33}} || October 26, 1992 || 16-bit || 33 MHz ||
+
| {{\|80386DX-16}} || 1988 || 32-bit || 16 MHz ||  
 
|-
 
|-
| {{\|80386SL-20}} || October 15, 1990 || 16-bit || 20 MHz ||
+
| {{\|80386DX-20}} || 1988 || 32-bit || 20 MHz ||
 
|-
 
|-
| {{\|80386SL-25}} || September 30, 1991 || 16-bit || 25 MHz ||
+
| {{\|80386DX-25}} || 1988 || 32-bit || 25 MHz ||
|}
 
 
 
=== Double-word eXternal ===
 
{| class="wikitable"
 
 
|-
 
|-
! Model !! Introduction !! Ext. Bus !! Frequency !! Notes
+
| {{\|80386DX-33}} || 1988 || 32-bit || 33 MHz ||
 
|-
 
|-
| {{\|80386-12}} || October 17, 1985 || 32-bit || 12 MHz || rowspan="3" | Renamed with "DX" suffix upon the introduction of the "SX" version.
+
| {{\|80386DX-16 IV}} || || 32-bit || 16 MHz ||
 
|-
 
|-
| {{\|80386-16}} ||  December, 1985 || 32-bit || 16 MHz  
+
| {{\|80386DX-20 IV}} ||  || 32-bit || 20 MHz ||
 
|-
 
|-
| {{\|80386-20}} ||  February 16, 1987 || 32-bit || 20 MHz  
+
| {{\|80386DX-25 IV}} ||  || 32-bit || 25 MHz ||
 
|-
 
|-
| {{\|80386DX-16}} || 1988 || 32-bit || 16 MHz ||
+
| {{\|80386DX-33 IV}} || || 32-bit || 33 MHz ||
|-
 
| {{\|80386DX-20}} || 1988 || 32-bit || 20 MHz ||
 
 
|-
 
|-
| {{\|80386DX-25}} || April 4, 1988 || 32-bit || 25 MHz ||
+
| {{\|80386SX-16}} || June 1988 || 16-bit || 16 MHz ||
 
|-
 
|-
| {{\|80386DX-33}} || April 10, 1989 || 32-bit || 33 MHz ||
+
| {{\|80386SX-20}} || June 1988 || 16-bit || 20 MHz ||
 
|-
 
|-
| {{\|80386DX-16 IV}} || || 32-bit || 16 MHz ||
+
| {{\|80386SX-25}} || June 1988 || 16-bit || 25 MHz ||
 
|-
 
|-
| {{\|80386DX-20 IV}} || || 32-bit || 20 MHz ||
+
| {{\|80386SX-33}} || October 1992 || 16-bit || 33 MHz ||
 
|-
 
|-
| {{\|80386DX-25 IV}} || || 32-bit || 25 MHz ||
+
| {{\|80386SL-20}} || October 1992 || 16-bit || 33 MHz ||
 
|-
 
|-
| {{\|80386DX-33 IV}} || || 32-bit || 33 MHz ||
+
| {{\|80386SL-25}} || October 1992 || 16-bit || 33 MHz ||
 
|}
 
|}
  
== Support Chips ==
+
== Suppport Chips ==
 
{| class="wikitable"
 
{| class="wikitable"
 
|-
 
|-
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== Clones ==
 
== Clones ==
* {{amd|Am386}}
+
{{empty section}}
{{expand list}}
 
  
== Documents ==
+
== Architecture ==
 
+
{{empty section}}
=== Manual ===
 
* [[:File:386 DX MICROPROCESS OR PROGRAMMER'S REFERENCE MANUAL (1990).pdf|386 DX MICROPROCESS OR PROGRAMMER'S REFERENCE MANUAL (1990)]]
 
* [[:File:386 SX MICROPROCESS OR PROGRAMMER'S REFERENCE MANUAL (1989).pdf|386 SX MICROPROCESS OR PROGRAMMER'S REFERENCE MANUAL (1989)]]
 
* [[:File:80386 HARDWARE REFERENCE MANUAL (1986).pdf|80386 HARDWARE REFERENCE MANUAL (1986)]]
 
 
 
=== Others ===
 
* [[:File:Introduction to the 80386 including the 80386 Data Sheet (April, 1986).pdf|Introduction to the 80386 including the 80386 Data Sheet (April, 1986)]]
 

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Facts about "80386 - Intel"
designerIntel +
first announcedJune 1984 +
first launchedOctober 1985 +
full page nameintel/80386 +
instance ofmicroprocessor family +
instruction set architectureIA-32 +
main designerIntel +
manufacturerIntel +
microarchitecture80386 +
nameIntel 80386 +
packagePGA-132 + and PQFP-132 +
process1,500 nm (1.5 μm, 0.0015 mm) + and 1,000 nm (1 μm, 0.001 mm) +
technologyCMOS +
word size32 bit (4 octets, 8 nibbles) +