Intel 80486 - Revision history

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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]]

			The '''Intel 80486''' is the successor to the [[Intel 80386]] in the [[Intel x86]] line of [[microprocessor]]s, the 4th generation in that line. 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]] [[data 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~~.		[[Image:i486 promo poster.jpg\|200px\|right\|thumb\|A 486 promo poster]]

			Later cost cutting variations included the 486SX, which was die compatible with the original 486DX part, except it had its math co-processor disabled. For the 486SX model, the 80487SX numeric co-processor is available. The 487SX part was in fact a 486DX CPU, and when it was installed, it turned off the 486SX, and did all the work.

			The 486DX was offered in 25, 33, 50 and 66 MHz versions; a 100 MHz version was demonstrated in 1990. For the 486SX, the speeds were 16, 20, 25 and 33 MHz.

			The 486's replacement was the [[Intel Pentium]].

	~~Its replacement was the [~~[Intel ~~Pentium~~]].		==External links==

			* [http://www.pcguide.com/ref/cpu/fam/g4I486SX-c.html Intel 80486SX]

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			[[Category: Intel Microprocessors]]

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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.		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.		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]].		Its replacement was the [[Intel Pentium]].

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2018-09-09T13:42:45Z

Proper Intel jargon for FPU

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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.`

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2018-09-08T18:22:45Z

Details on FPU

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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]]~~.		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.

	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.`

			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.

	Its replacement was the [[Intel Pentium]].		Its replacement was the [[Intel Pentium]].

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2018-09-06T22:45:03Z

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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]].		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.		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.`

	Its replacement was the [[Intel Pentium]].		Its replacement was the [[Intel Pentium]].

	{{stub}}		{{stub}}

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2018-09-06T19:02:14Z

Somewhat stubby, but a start

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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]].

{{stub}}