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The PC platform is an open architecture system that IBM initially designed in 1980. IBM's PC 5150 is the progenitor (though in no way representative of iterative designs like the desktops and laptops you may be familiar with today). The massive success of the PC architecture in the 1980s prompted Intel to iterate on its x86 processors, which is why this page is called '''Intel CPUs'''.

The history of the PC is comprehensive, but a good summary is that almost every component of the 5150 was <abbr title="existing tech IBM neither made in-house or signed an exclusivity agreement on">off-the-shelf (i.e., parts that IBM did not make themselves or sign an exclusivity agreement for others to use)</abbr>. IBM hoped that if clones popped up, they could sue them for using the firmware in the BIOS, which they had [[Licensing|copyright]] overas established by [[wikipedia:Apple_Computer,_Inc._v._Franklin_Computer_Corp.|a lawsuit between Apple and Franklin]].<ref>[https://www.courtlistener. com/opinion/423653/apple-computer-inc-a-california-corporation-v-franklin-computer/ Apple v. Franklin]. (1983)</ref> However, Compaq came up with [[wikipedia:Phoenix_Technologies|Phoenix]] designed a clean-room replacement firmware based solely on IBM's own public documentation from .<ref>[https://books.google.com/books?id=Bwng8NJ5fesC&pg=PA56 Phoenix Says Its BIOS May Foil IBM that they made publicly available, which they defended as a clean-room reimplementation's Lawsuits]. PC Mag. 1984. </ref> As a result, IBM never challenged clones that used it and promptly lost control over the platform. The Intel would later take up the next major iteration would come from Intel in 1995, called ATX.

! scope="col"|[[libretroPentium III<nowiki>*⁷</nowiki>! scope="col"|Libretro Core]]Pentium 4<nowiki>*⁸</nowiki>

!colspan="1416"|PC / x86

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!colspan="1416"|Mobile / ARM

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|[https://githubvirtualmachinery.weebly.com/limboemu/limbo/wiki 5-downloads.html 6.10.0]

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;[[PCem]]:As of June 14, 2021, PCem's original developer, Sarah Walker, has stopped working on the project. They are offering the transfer of the project and GitHub repo to another developer if interestedIt has now been taken over on December 18, 2021 by a new maintainer, Michael Manley.