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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 == |
{{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 || |
|- | |- | ||
− | | {{\| | + | | {{\|80386SX-20}} || January 25, 1989 || 16-bit || 20 MHz || |
|- | |- | ||
− | | {{\|80386-20}} || February 1987 || 32-bit || 20 MHz | + | | {{\|80386SX-25}} || January 25, 1989 || 16-bit || 25 MHz || |
+ | |- | ||
+ | | {{\|80386SX-33}} || October 26, 1992 || 16-bit || 33 MHz || | ||
+ | |- | ||
+ | | {{\|80386SL-20}} || October 15, 1990 || 16-bit || 20 MHz || | ||
+ | |- | ||
+ | | {{\|80386SL-25}} || September 30, 1991 || 16-bit || 25 MHz || | ||
+ | |} | ||
+ | |||
+ | === Double-word eXternal === | ||
+ | {| class="wikitable" | ||
+ | |- | ||
+ | ! Model !! Introduction !! Ext. Bus !! Frequency !! Notes | ||
+ | |- | ||
+ | | {{\|80386-12}} || October 17, 1985 || 32-bit || 12 MHz || rowspan="3" | Renamed with "DX" suffix upon the introduction of the "SX" version. | ||
+ | |- | ||
+ | | {{\|80386-16}} || December, 1985 || 32-bit || 16 MHz | ||
+ | |- | ||
+ | | {{\|80386-20}} || February 16, 1987 || 32-bit || 20 MHz | ||
|- | |- | ||
| {{\|80386DX-16}} || 1988 || 32-bit || 16 MHz || | | {{\|80386DX-16}} || 1988 || 32-bit || 16 MHz || | ||
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| {{\|80386DX-20}} || 1988 || 32-bit || 20 MHz || | | {{\|80386DX-20}} || 1988 || 32-bit || 20 MHz || | ||
|- | |- | ||
− | | {{\|80386DX-25}} || 1988 || 32-bit || 25 MHz || | + | | {{\|80386DX-25}} || April 4, 1988 || 32-bit || 25 MHz || |
|- | |- | ||
− | | {{\|80386DX-33}} || | + | | {{\|80386DX-33}} || April 10, 1989 || 32-bit || 33 MHz || |
|- | |- | ||
| {{\|80386DX-16 IV}} || || 32-bit || 16 MHz || | | {{\|80386DX-16 IV}} || || 32-bit || 16 MHz || | ||
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|- | |- | ||
| {{\|80386DX-33 IV}} || || 32-bit || 33 MHz || | | {{\|80386DX-33 IV}} || || 32-bit || 33 MHz || | ||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
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|} | |} | ||
− | == | + | == Support Chips == |
{| class="wikitable" | {| class="wikitable" | ||
|- | |- | ||
Line 95: | Line 104: | ||
== Clones == | == Clones == | ||
− | {{ | + | * {{amd|Am386}} |
+ | {{expand list}} | ||
+ | |||
+ | == Documents == | ||
+ | |||
+ | === 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)]] |
Latest revision as of 08:43, 5 December 2022
Intel 80386 | |
Intel A80386DX-16 ΣΣ | |
Developer | Intel |
Manufacturer | Intel |
Type | Microprocessors |
Introduction | June 1984 (announced) October 1985 (launch) |
Production | 1985-2008 |
Architecture | x86 |
ISA | IA-32 |
µarch | 80386 |
Word size | 32 bit 4 octets
8 nibbles |
Process | 1.5 µm 1,500 nm , 1 µm0.0015 mm 1,000 nm
0.001 mm |
Technology | CMOS |
Clock | 12 MHz-33 MHz |
Package | PGA-132, PQFP-132 |
Succession | |
← | → |
80286 | 80486 |
The 80386, also i386 and 386, (pronounced eighty-three-eighty-six) was a family of 32-bit 3rd-generation x86 microprocessors introduced by Intel in 1985 as a successor to 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 protected mode and virtual 8086 mode. The changes brought about by 386 became the standard for all future 32-bit x86 processors, dubbed i386-architecture.
Contents
Architecture[edit]
This section is empty; you can help add the missing info by editing this page. |
Members[edit]
Single-word eXternal[edit]
Model | Introduction | Ext. Bus | Frequency | Notes |
---|---|---|---|---|
80386SX-16 | June 16, 1988 | 16-bit | 16 MHz | |
80386SX-20 | January 25, 1989 | 16-bit | 20 MHz | |
80386SX-25 | January 25, 1989 | 16-bit | 25 MHz | |
80386SX-33 | October 26, 1992 | 16-bit | 33 MHz | |
80386SL-20 | October 15, 1990 | 16-bit | 20 MHz | |
80386SL-25 | September 30, 1991 | 16-bit | 25 MHz |
Double-word eXternal[edit]
Model | Introduction | Ext. Bus | Frequency | Notes |
---|---|---|---|---|
80386-12 | October 17, 1985 | 32-bit | 12 MHz | Renamed with "DX" suffix upon the introduction of the "SX" version. |
80386-16 | December, 1985 | 32-bit | 16 MHz | |
80386-20 | February 16, 1987 | 32-bit | 20 MHz | |
80386DX-16 | 1988 | 32-bit | 16 MHz | |
80386DX-20 | 1988 | 32-bit | 20 MHz | |
80386DX-25 | April 4, 1988 | 32-bit | 25 MHz | |
80386DX-33 | April 10, 1989 | 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 |
Support Chips[edit]
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[edit]
This list is incomplete; you can help by expanding it.
Documents[edit]
Manual[edit]
- 386 DX MICROPROCESS OR PROGRAMMER'S REFERENCE MANUAL (1990)
- 386 SX MICROPROCESS OR PROGRAMMER'S REFERENCE MANUAL (1989)
- 80386 HARDWARE REFERENCE MANUAL (1986)
Others[edit]
Facts about "80386 - Intel"
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) + |