Intel Pentium - Revision history

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2025-05-21T13:05:41Z

External links: +The Pentium as a Navajo weaving

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			==External links==

			* [http://www.righto.com/2024/08/pentium-navajo-fairchild-shiprock.html The Pentium as a Navajo weaving] - interesting connection between two worlds

	[[Category: Intel Microprocessors]]		[[Category: Intel Microprocessors]]

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2018-11-03T11:46:10Z

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	The [[memory management]] unit was upgraded to support 4 Mbyte [[page]]s as well as the 4Kbyte pages of the earlier machines. In addition, [[parity]] was added to the [[address]] bus.		The [[memory management]] unit was upgraded to support 4 Mbyte [[page]]s as well as the 4Kbyte pages of the earlier machines. In addition, [[parity]] was added to the [[address]] bus.

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			[[Category: Intel Microprocessors]]

Jnc: A decent start

2018-09-08T18:57:22Z

A decent start

New page

The '''Intel Pentium''' was the successor to the [[Intel 80486]] in the [[Intel x86]] line of [[microprocessor]]s. It was originally going to be named the '''80586''', but a name consisting of only a number could not be trademarked, which led to the switch to the new name.

Externally, it is functionally the same [[Central Processing Unit|CPU]] as the 486, but includes a number of internal improvements to increase its performance:

* Two 8K byte [[cache]]s, one each for [[object code|code]] and data, so that [[loop]]s processing large [[array]]s will not empty the cache.
* The [[main memory]] [[bus]] is 64 [[bit]]s wide, double that of the 486.
* [[Branch prediction]] [[logic]] was added.
* Two separate integer processing units ('U-pipe' and 'V-pipe') make it a [[superscalar]] CPU, capable of executing two [[instruction]]s per [[clock]] tick.
* Improvements in the numeric [[co-processor]] made it 5 times faster than that of the 486.

The [[memory management]] unit was upgraded to support 4 Mbyte [[page]]s as well as the 4Kbyte pages of the earlier machines. In addition, [[parity]] was added to the [[address]] bus.