Editing intel/80386

{{intel title|80386}}
{{ic family
| title             = Intel 80386
| image             = KL Intel i386DX.jpg
| caption           = Intel A80386DX-16 ΣΣ
| developer         = Intel
| manufacturer      = Intel
| type              = Microprocessors
| first announced   = June 1984
| first launched    = October 1985
| production start  = 1985
| production end    = 2008
| arch              = x86
| isa               = IA-32
| microarch         = 80386
| word              = 32 bit
| proc              = 1.5 µm
| proc 2            = 1 µm
| tech              = CMOS
| clock             = <!-- clock speed, e.g. "740 kHz"  IF RANGE, USE PARAM BELOW!    -->
| clock min         = 12 MHz
| clock max         = 33 MHz
| package           = PGA-132
| package 2         = PQFP-132
| succession       = yes
| predecessor      = 80286
| predecessor link = intel/80286
| successor        = 80486
| successor link   = intel/80486
}}
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]].

== History ==
{{empty section}}

== Members ==

=== Single-word eXternal ===

{| class="wikitable"
|-
! Model !! Introduction !! Ext. Bus !! Frequency !! Notes
|-
| {{\|80386SX-16}} || June 1988 || 16-bit || 16 MHz ||
|-
| {{\|80386SX-20}} || June 1988 || 16-bit || 20 MHz ||
|-
| {{\|80386SX-25}} || June 1988 || 16-bit || 25 MHz ||
|-
| {{\|80386SX-33}} || October 1992 || 16-bit || 33 MHz ||
|-
| {{\|80386SL-20}} || October 1992 || 16-bit || 33 MHz ||
|-
| {{\|80386SL-25}} || October 1992 || 16-bit || 33 MHz ||
|}

=== Double-word eXternal ===
{| class="wikitable"
|-
! Model !! Introduction !! Ext. Bus !! Frequency !! Notes
|-
| {{\|80386-12}} || October 1985 || 32-bit || 12 MHz || rowspan="3" | Renamed with "DX" suffix upon the introduction of the "SX" version.
|-
| {{\|80386-16}} ||  1985 || 32-bit || 16 MHz 
|-
| {{\|80386-20}} ||  February 1987 || 32-bit || 20 MHz 
|-
| {{\|80386DX-16}} || 1988 || 32-bit || 16 MHz || 
|-
| {{\|80386DX-20}} || 1988 || 32-bit || 20 MHz ||
|-
| {{\|80386DX-25}} || 1988 || 32-bit || 25 MHz ||
|-
| {{\|80386DX-33}} || 1988 || 32-bit || 33 MHz ||
|-
| {{\|80386DX-16 IV}} ||  || 32-bit || 16 MHz ||
|-
| {{\|80386DX-20 IV}} ||  || 32-bit || 20 MHz ||
|-
| {{\|80386DX-25 IV}} ||  || 32-bit || 25 MHz ||
|-
| {{\|80386DX-33 IV}} ||  || 32-bit || 33 MHz ||
|}

== Suppport Chips ==
{| class="wikitable"
|-
! Part !! Description 
|-
| {{\|A82370-16}} || 32-bit 8-channel DMA controller @ 16 MB/sec
|-
| {{\|82380-16}} || 32-bit DMA controller with Programmable Interrupt Controller (PIC) @ 16 MHz
|-
| {{\|82380-20}} || 32-bit DMA controller with Programmable Interrupt Controller (PIC) @ 20 MHz
|-
| {{\|82380-25}} || 32-bit DMA controller with Programmable Interrupt Controller (PIC) @ 25 MHz
|-
| {{\|82384-16}} || Clock generator @ 16 MHz
|-
| {{\|82384-20}} || Clock generator @ 20 MHz
|-
| {{\|82385}} || Cache Controller
|}

== Clones ==
* {{amd|Am386}}
{{expand list}}

== Architecture ==
{{empty section}}
designer	Intel +
first announced	June 1984 +
first launched	October 1985 +
full page name	intel/80386 +
instance of	microprocessor family +
instruction set architecture	IA-32 +
main designer	Intel +
manufacturer	Intel +
microarchitecture	80386 +
name	Intel 80386 +
package	PGA-132 + and PQFP-132 +
process	1,500 nm (1.5 μm, 0.0015 mm) + and 1,000 nm (1 μm, 0.001 mm) +
technology	CMOS +
word size	32 bit (4 octets, 8 nibbles) +