Intel 80486 - Revision history

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2018-09-09T13:42:45Z

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The '''Intel 80486''' is the successor to the [[Intel 80386]] in the [[Intel x86]] line of [[microprocessor]]s. It is basically the same [[Central Processing Unit|CPU]] as the 386, but includes the functionality of the [[Intel 80387]] [[floating point]] unit, and an 8K byte [[cache]].

Implementation changes mean about half the [[instruction]]s execute in one clock cycle, instead of the two used in the 386, speeding it up considerably.

Its replacement was the [[Intel Pentium]].

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-The '''Intel 80486''' is the successor to the [[Intel 80386]] in the [[Intel x86]] line of [[microprocessor]]s. It is basically the same [[Central Processing Unit|CPU]] as the 386, but includes an 8K byte [[cache]], and optionally (in the 80486DX model) the functionality of the [[Intel 80387]] numeric [[co-processor]], the [[floating point]] unit.
+[[Image:80486DX-33 CPU.jpg|200px|thumb|left|An 80486 cpu]]
 Implementation changes mean about half the [[instruction]]s execute in one [[clock]] cycle, instead of the two used in the 386, speeding it up considerably. Its [[main memory]] [[data bus]] is 32 [[bit]]s wide, the same as the 386.`
-It was offered in 25, 33, 50 and 66 MHz versions; a 100 MHz version was demonstrated in 1990. For the 80486SX model, the 80487SX numeric [[co-processor]] is available.
+[[Image:i486 promo poster.jpg|200px|right|thumb|A 486 promo poster]]
-Its replacement was the [[Intel Pentium]].
+==External links==
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 The '''Intel 80486''' is the successor to the [[Intel 80386]] in the [[Intel x86]] line of [[microprocessor]]s. It is basically the same [[Central Processing Unit|CPU]] as the 386, but includes an 8K byte [[cache]], and optionally (in the 80486DX model) the functionality of the [[Intel 80387]] numeric [[co-processor]], the [[floating point]] unit.
-Implementation changes mean about half the [[instruction]]s execute in one clock cycle, instead of the two used in the 386, speeding it up considerably. Its [[main memory]] [[bus]] is 32 [[bit]]s wide, the same as the 386.`
+Implementation changes mean about half the [[instruction]]s execute in one [[clock]] cycle, instead of the two used in the 386, speeding it up considerably. Its [[main memory]] [[data bus]] is 32 [[bit]]s wide, the same as the 386.`
 It was offered in 25, 33, 50 and 66 MHz versions; a 100 MHz version was demonstrated in 1990. For the 80486SX model, the 80487SX numeric [[co-processor]] is available.
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 Its replacement was the [[Intel Pentium]].
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+{{semi-stub}}

← Older revision		Revision as of 13:42, 9 September 2018
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−	The '''Intel 80486''' is the successor to the [[Intel 80386]] in the [[Intel x86]] line of [[microprocessor]]s. It is basically the same [[Central Processing Unit\|CPU]] as the 386, but includes an 8K byte [[cache]], and optionally (in the 80486DX model) the functionality of the [[Intel 80387]] [[floating point]] unit.	+	The '''Intel 80486''' is the successor to the [[Intel 80386]] in the [[Intel x86]] line of [[microprocessor]]s. It is basically the same [[Central Processing Unit\|CPU]] as the 386, but includes an 8K byte [[cache]], and optionally (in the 80486DX model) the functionality of the [[Intel 80387]] numeric [[co-processor]], the [[floating point]] unit.

	Implementation changes mean about half the [[instruction]]s execute in one clock cycle, instead of the two used in the 386, speeding it up considerably. Its [[main memory]] [[bus]] is 32 [[bit]]s wide, the same as the 386.`		Implementation changes mean about half the [[instruction]]s execute in one clock cycle, instead of the two used in the 386, speeding it up considerably. Its [[main memory]] [[bus]] is 32 [[bit]]s wide, the same as the 386.`