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{{intel title|80486}} | {{intel title|80486}} | ||
{{ic family | {{ic family | ||
− | | title = | + | | title = Intel 80486 |
| image = Intel i486 DX 25MHz SX328.jpg | | image = Intel i486 DX 25MHz SX328.jpg | ||
| caption = Intel A80486DX-25 | | caption = Intel A80486DX-25 | ||
Line 8: | Line 8: | ||
| type = Microprocessors | | type = Microprocessors | ||
| first announced = April 10, 1989 | | first announced = April 10, 1989 | ||
− | | first launched = June, | + | | first launched = June, 1989 |
| production start = 1988 | | production start = 1988 | ||
| production end = 2007 | | production end = 2007 | ||
Line 18: | Line 18: | ||
| proc 2 = 800 nm | | proc 2 = 800 nm | ||
| proc 3 = 600 nm | | proc 3 = 600 nm | ||
− | | tech = | + | | tech = CMOS |
| clock min = 16 MHz | | clock min = 16 MHz | ||
| clock max = 100 MHz | | clock max = 100 MHz | ||
Line 34: | Line 34: | ||
== Architecture == | == Architecture == | ||
{{main|intel/microarchitectures/80486|l1=80486 Microarchitectures}} | {{main|intel/microarchitectures/80486|l1=80486 Microarchitectures}} | ||
− | Like {{\\|80386|its predecessor}}, the 80486 maintains full backwards [[object code]] comparability with the all previous [[x86]] processors ({{\\|80386}}, {{\\|80286}}, {{\\|80186}}, etc...). To improve performance Intel introduced a new layer of | + | Like {{\\|80386|its predecessor}}, the 80486 maintains full backwards [[object code]] comparability with the all previous [[x86]] processors ({{\\|80386}}, {{\\|80286}}, {{\\|80186}}, etc...). To improve performance Intel introduced a new layer of cache on-die (previously various external extensions existed). The 8 KB, 4-way set associative, write-back policy, cache was unified for both the data and instructions. This provided much needed faster access to recently used data and instructions. Various enhancements were also made to the bus interface including faster communication that required single clock cycle instead of multiple. |
Whereas before a separately packaged [[FPU|math]] [[coprocessor]] was used (i.e. {{\\|80387}}, {{\\|80287}}, etc..), the 80486 moved the unit on-die eliminating the external communication delays altogether. Furthermore more aggressive math algorithms were used to implement the new [[FPU]] yielding faster floating point calculations. | Whereas before a separately packaged [[FPU|math]] [[coprocessor]] was used (i.e. {{\\|80387}}, {{\\|80287}}, etc..), the 80486 moved the unit on-die eliminating the external communication delays altogether. Furthermore more aggressive math algorithms were used to implement the new [[FPU]] yielding faster floating point calculations. | ||
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created and tagged accordingly. | created and tagged accordingly. | ||
− | Missing a | + | Missing a chip? please dump its name here: http://en.wikichip.org/wiki/WikiChip:wanted_chips |
--> | --> | ||
<table class="wikitable sortable"> | <table class="wikitable sortable"> | ||
− | <tr><th colspan="16" style="background:#D6D6FF;"> | + | <tr><th colspan="16" style="background:#D6D6FF;">i486DX Processors</th></tr> |
<tr><th>Model</th><th>Launched</th><th>Process</th><th>Freq</th><th>Max Mem</th></tr> | <tr><th>Model</th><th>Launched</th><th>Process</th><th>Freq</th><th>Max Mem</th></tr> | ||
{{#ask: [[Category:microprocessor models by intel]][[instance of::microprocessor]][[microprocessor family::80486]][[core name::~486DX*]] | {{#ask: [[Category:microprocessor models by intel]][[instance of::microprocessor]][[microprocessor family::80486]][[core name::~486DX*]] | ||
|?full page name | |?full page name | ||
|?model number | |?model number | ||
− | |? | + | |?first launched |
|?process | |?process | ||
|?base frequency#MHz | |?base frequency#MHz |
Latest revision as of 08:27, 29 October 2022
Intel 80486 | |
![]() | |
Intel A80486DX-25 | |
Developer | Intel |
Manufacturer | Intel |
Type | Microprocessors |
Introduction | April 10, 1989 (announced) June, 1989 (launch) |
Production | 1988-2007 |
Architecture | x86 |
ISA | IA-32 |
µarch | 80486 |
Word size | 32 bit 4 octets
8 nibbles |
Process | 1 µm 1,000 nm , 800 nm0.001 mm 0.8 μm , 600 nm8.0e-4 mm 0.6 μm
6.0e-4 mm |
Technology | CMOS |
Clock | 16 MHz-100 MHz |
Package | PGA-168, PQFP-196, SQFP-208 |
Succession | |
← | → |
80386 | Pentium |
The 80486, also i486 and 486, (pronounced eighty-four-eighty-six) was a family of 32-bit 4th-generation x86 microprocessors introduced by Intel in 1989 as a successor to the 80386. 486 introduced a number of enhancements to 386 including a new level 1 cache, better IPC performance, and an integrated FPU. The 486 became the first x86 chip family to exceed one million transistors.
Contents
Architecture[edit]
- Main article: 80486 Microarchitectures
Like its predecessor, the 80486 maintains full backwards object code comparability with the all previous x86 processors (80386, 80286, 80186, etc...). To improve performance Intel introduced a new layer of cache on-die (previously various external extensions existed). The 8 KB, 4-way set associative, write-back policy, cache was unified for both the data and instructions. This provided much needed faster access to recently used data and instructions. Various enhancements were also made to the bus interface including faster communication that required single clock cycle instead of multiple.
Whereas before a separately packaged math coprocessor was used (i.e. 80387, 80287, etc..), the 80486 moved the unit on-die eliminating the external communication delays altogether. Furthermore more aggressive math algorithms were used to implement the new FPU yielding faster floating point calculations.
The pipeline itself received some attention as well. Simple ALU register, register and register, immediate cached operations could now complete in a single cycle; this previously required at least 2 cycles.
Members[edit]
i486DX[edit]
i486DX Processors | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Model | Launched | Process | Freq | Max Mem | |||||||||||
i486DX-20 | June 1989 | 1,000 nm 1 μm 800 nm0.001 mm 0.8 μm 8.0e-4 mm | 20 MHz 0.02 GHz 20,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | |||||||||||
i486DX-25 | June 1989 | 1,000 nm 1 μm 800 nm0.001 mm 0.8 μm 8.0e-4 mm | 25 MHz 0.025 GHz 25,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | |||||||||||
i486DX-33 | 7 May 1990 | 1,000 nm 1 μm 800 nm0.001 mm 0.8 μm 8.0e-4 mm | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | |||||||||||
i486DX-50 | 24 June 1991 | 1,000 nm 1 μm 800 nm0.001 mm 0.8 μm 8.0e-4 mm | 50 MHz 0.05 GHz 50,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | |||||||||||
i486DX2-40 | 3 March 1992 | 1,000 nm 1 μm 800 nm0.001 mm 0.8 μm 8.0e-4 mm | 40 MHz 0.04 GHz 40,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | |||||||||||
i486DX2-50 | 3 March 1992 | 1,000 nm 1 μm 800 nm0.001 mm 0.8 μm 8.0e-4 mm | 50 MHz 0.05 GHz 50,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | |||||||||||
i486DX2-66 | 3 March 1992 | 1,000 nm 1 μm 800 nm0.001 mm 0.8 μm 8.0e-4 mm | 66 MHz 0.066 GHz 66,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | |||||||||||
i486DX4-100 | 7 March 1994 | 600 nm 0.6 μm 6.0e-4 mm | 100 MHz 0.1 GHz 100,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | |||||||||||
i486DX4-75 | 7 March 1994 | 600 nm 0.6 μm 6.0e-4 mm | 75 MHz 0.075 GHz 75,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | |||||||||||
Count: 9 |
i486SX[edit]
i486SX Processors | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Model | Launched | Process | Freq | Max Mem | |||||||||||
i486SX-16 | 22 April 1991 | 1,000 nm 1 μm 800 nm0.001 mm 0.8 μm 8.0e-4 mm | 16 MHz 0.016 GHz 16,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | |||||||||||
i486SX-20 | 16 September 1991 | 1,000 nm 1 μm 800 nm0.001 mm 0.8 μm 8.0e-4 mm | 20 MHz 0.02 GHz 20,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | |||||||||||
i486SX-25 | 16 September 1991 | 1,000 nm 1 μm 800 nm0.001 mm 0.8 μm 8.0e-4 mm | 25 MHz 0.025 GHz 25,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | |||||||||||
i486SX-33 | 21 September 1992 | 1,000 nm 1 μm 800 nm0.001 mm 0.8 μm 8.0e-4 mm | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | |||||||||||
i486SX2-50 | 800 nm 0.8 μm 8.0e-4 mm | 50 MHz 0.05 GHz 50,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||||
i486SX2-66 | 800 nm 0.8 μm 8.0e-4 mm | 66 MHz 0.066 GHz 66,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||||
Count: 6 |
i486SL[edit]
i486SL Processors | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Model | Launched | Process | Freq | Max Mem | |||||||||||
i486SL-20 | 9 November 1992 | 800 nm 0.8 μm 8.0e-4 mm | 20 MHz 0.02 GHz 20,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | |||||||||||
i486SL-25 | 9 November 1992 | 800 nm 0.8 μm 8.0e-4 mm | 25 MHz 0.025 GHz 25,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | |||||||||||
i486SL-33 | 9 November 1992 | 800 nm 0.8 μm 8.0e-4 mm | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | |||||||||||
Count: 3 |
i486GX[edit]
i486GX Processors | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Model | Launched | Process | Freq | Max Mem | |||||||||||
i486GX-33 | 800 nm 0.8 μm 8.0e-4 mm | 33 MHz 0.033 GHz 33,000 kHz | 4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB | ||||||||||||
Count: 1 |
Clones[edit]
This list is incomplete; you can help by expanding it.
Documents[edit]
Datasheet[edit]
- 486 DX2 Microprocessor Data Book (February 1992)
- Intel486 DX2 Microprocessor Data Book (July 1992)
- 486 DX Microprocessor Data Book (October 1992)
- i486 MICROPROCESSOR (April 1989)
Manual[edit]
designer | Intel + |
first announced | April 10, 1989 + |
first launched | June 1989 + |
full page name | intel/80486 + |
instance of | microprocessor family + |
instruction set architecture | IA-32 + |
main designer | Intel + |
manufacturer | Intel + |
microarchitecture | 80486 + |
name | Intel 80486 + |
package | PGA-168 +, PQFP-196 + and SQFP-208 + |
process | 1,000 nm (1 μm, 0.001 mm) +, 800 nm (0.8 μm, 8.0e-4 mm) + and 600 nm (0.6 μm, 6.0e-4 mm) + |
technology | CMOS + |
word size | 32 bit (4 octets, 8 nibbles) + |