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Difference between revisions of "intel/80486"
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== Members ==
 
== Members ==
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=== i486DX ===
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<table class="wikitable sortable">
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<tr><th colspan="15" style="background:#D6D6FF;">i486DX Processors</th></tr>
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<tr><th>Model</th><th>Launched</th><th>Freq</th><th>Max Mem</th></tr>
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{{#ask: [[Category:microprocessor models by intel]][[instance of::microprocessor]][[microprocessor family::80486]][[core name::~486DX*]]
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|?full page name
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|?model number
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|?first launched
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|?base frequency#MHz
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|?max memory#GB
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|template=proc table 2
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}}
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<tr><th colspan="15">Count: {{#ask:[[Category:microprocessor models by intel]][[instance of::microprocessor]][[microprocessor family::80486]][[core name::~486DX*]]|format=count}}</th></tr>
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</table>
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=== i486SX ===
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<!-- NOTE:
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          This table is generated automatically from the data in the actual articles.
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          If a microprocessor is missing from the list, an appropriate article for it needs to be
 +
          created and tagged accordingly.
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          Missing a chip? please dump its name here: http://en.wikichip.org/wiki/WikiChip:wanted_chips
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-->
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<table class="wikitable sortable">
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<tr><th colspan="15" style="background:#D6D6FF;">i486SX Processors</th></tr>
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<tr><th>Model</th><th>Launched</th><th>Freq</th><th>Max Mem</th></tr>
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{{#ask: [[Category:microprocessor models by intel]][[instance of::microprocessor]][[microprocessor family::80486]][[core name::~486SX*]]
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|?full page name
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|?model number
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|?first launched
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|?base frequency#MHz
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|?max memory#GB
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|format=template
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|template=proc table 2
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|userparam=5
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|mainlabel=-
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}}
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<tr><th colspan="15">Count: {{#ask:[[Category:microprocessor models by intel]][[instance of::microprocessor]][[microprocessor family::80486]][[core name::~486SX*]]|format=count}}</th></tr>
 +
</table>
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 +
=== i486SL ===
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<!-- NOTE:
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          This table is generated automatically from the data in the actual articles.
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          If a microprocessor is missing from the list, an appropriate article for it needs to be
 +
          created and tagged accordingly.
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 +
          Missing a chip? please dump its name here: http://en.wikichip.org/wiki/WikiChip:wanted_chips
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-->
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<table class="wikitable sortable">
 +
<tr><th colspan="15" style="background:#D6D6FF;">i486SL Processors</th></tr>
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<tr><th>Model</th><th>Launched</th><th>Freq</th><th>Max Mem</th></tr>
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{{#ask: [[Category:microprocessor models by intel]][[instance of::microprocessor]][[microprocessor family::80486]][[core name::~486SL*]]
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|?full page name
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|?model number
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|?first launched
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|?base frequency#MHz
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|?max memory#GB
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|format=template
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|template=proc table 2
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|userparam=5
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|mainlabel=-
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}}
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<tr><th colspan="15">Count: {{#ask:[[Category:microprocessor models by intel]][[instance of::microprocessor]][[microprocessor family::80486]][[core name::~486SL*]]|format=count}}</th></tr>
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</table>
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 +
=== i486GX ===
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<!-- NOTE:
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          This table is generated automatically from the data in the actual articles.
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          If a microprocessor is missing from the list, an appropriate article for it needs to be
 +
          created and tagged accordingly.
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 +
          Missing a chip? please dump its name here: http://en.wikichip.org/wiki/WikiChip:wanted_chips
 +
-->
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<table class="wikitable sortable">
 +
<tr><th colspan="15" style="background:#D6D6FF;">i486GX Processors</th></tr>
 +
<tr><th>Model</th><th>Launched</th><th>Freq</th><th>Max Mem</th></tr>
 +
{{#ask: [[Category:microprocessor models by intel]][[instance of::microprocessor]][[microprocessor family::80486]][[core name::~486GX*]]
 +
|?full page name
 +
|?model number
 +
|?first launched
 +
|?base frequency#MHz
 +
|?max memory#GB
 +
|format=template
 +
|template=proc table 2
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|userparam=5
 +
|mainlabel=-
 +
}}
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<tr><th colspan="15">Count: {{#ask:[[Category:microprocessor models by intel]][[instance of::microprocessor]][[microprocessor family::80486]][[core name::~486GX*]]|format=count}}</th></tr>
 +
</table>
  
 
== Clones ==
 
== Clones ==
 
* {{amd|Am386}}
 
* {{amd|Am386}}
 
{{expand list}}
 
{{expand list}}

Revision as of 17:05, 11 May 2016

Intel 80486
Intel i486 DX 25MHz SX328.jpg
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
0.001 mm
, 800 nm
0.8 μm
8.0e-4 mm
, 600 nm
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.

Architecture

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

i486DX

i486DX Processors
ModelLaunchedFreqMax Mem
i486DX-20June 198920 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-25June 198925 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-337 May 199033 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-5024 June 199150 MHz
0.05 GHz
50,000 kHz
4,096 MiB
4,194,304 KiB
4,294,967,296 B
4 GiB
0.00391 TiB
i486DX2-403 March 199240 MHz
0.04 GHz
40,000 kHz
4,096 MiB
4,194,304 KiB
4,294,967,296 B
4 GiB
0.00391 TiB
i486DX2-503 March 199250 MHz
0.05 GHz
50,000 kHz
4,096 MiB
4,194,304 KiB
4,294,967,296 B
4 GiB
0.00391 TiB
i486DX2-663 March 199266 MHz
0.066 GHz
66,000 kHz
4,096 MiB
4,194,304 KiB
4,294,967,296 B
4 GiB
0.00391 TiB
i486DX4-1007 March 1994100 MHz
0.1 GHz
100,000 kHz
4,096 MiB
4,194,304 KiB
4,294,967,296 B
4 GiB
0.00391 TiB
i486DX4-757 March 199475 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

i486SX Processors
ModelLaunchedFreqMax Mem
i486SX-1622 April 199116 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-2016 September 199120 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-2516 September 199125 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-3321 September 199233 MHz
0.033 GHz
33,000 kHz
4,096 MiB
4,194,304 KiB
4,294,967,296 B
4 GiB
0.00391 TiB
i486SX2-5050 MHz
0.05 GHz
50,000 kHz
4,096 MiB
4,194,304 KiB
4,294,967,296 B
4 GiB
0.00391 TiB
i486SX2-6666 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

i486SL Processors
ModelLaunchedFreqMax Mem
i486SL-209 November 199220 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-259 November 199225 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-339 November 199233 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

i486GX Processors
ModelLaunchedFreqMax Mem
i486GX-3333 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

This list is incomplete; you can help by expanding it.

Retrieved from "https://en.wikichip.org/w/index.php?title=intel/80486&oldid=18565"
Facts about "80486 - Intel"
RDF feed
designerIntel +
first announcedApril 10, 1989 +
first launchedJune 1989 +
full page nameintel/80486 +
instance ofmicroprocessor family +
instruction set architectureIA-32 +
main designerIntel +
manufacturerIntel +
microarchitecture80486 +
nameIntel 80486 +
packagePGA-168 +, PQFP-196 + and SQFP-208 +
process1,000 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) +
technologyCMOS +
word size32 bit (4 octets, 8 nibbles) +