View source for IAPX

{{Short description|An Intel processor architecture}}
{{DISPLAYTITLE:iAPX}}
{{hatnote|This article is about iAPX as a name. For the most well-known iAPX CPUs, see [[Intel iAPX 432]] or [[iAPX 86]].}}
{{distinguish|text = Intel [[Advanced Performance Extensions]] (APX)}}
In marketing, '''iAPX''' (''Intel Advanced Performance Architecture''<ref>{{Cite web |url=http://www.dvorak.org/blog/whatever-happened-to-the-intel-iapx432/ |title=dvorak.org |access-date=2014-03-19 |archive-date=2017-11-25 |archive-url=https://web.archive.org/web/20171125031112/http://www.dvorak.org/blog/whatever-happened-to-the-intel-iapx432/ |url-status=live }}</ref>) was a short lived designation used for several [[Intel]] microprocessors, including some [[8086]] family processors.<ref name="Intel_1983_iAPX286"/> Not being a simple initialism seems to have confused even Intel's technical writers as can be seen in their iAPX-88 Book where the asterisked expansion shows iAPX to mean ''Intel Advanced Processor System''.<ref name="iAPX-88">[http://bitsavers.trailing-edge.com/pdf/intel/8086/210200_iAPX88_Book_1981.pdf Intel iAPX 88 Book] {{Webarchive|url=https://web.archive.org/web/20160427222906/http://bitsavers.trailing-edge.com/pdf/intel/8086/210200_iAPX88_Book_1981.pdf |date=2016-04-27 }} (page i)</ref>
The iAPX prefix originally belonged to the [[Intel iAPX 432]] architecture, alias [[Intel 8800]]. However, as this radical design failed in the marketplace, Intel also tried it on its more conventional 8086-family of processors, mainly used as a kind of system prefix but also to denote individual processors in the family. The 8086 based line was therefore called the '''iAPX 86 series''' for a few years during the early 1980s.<ref name="Intel_1983_iAPX286"/><ref name="i86">{{Cite web |url=http://bitsavers.informatik.uni-stuttgart.de/pdf/intel/_dataBooks/1981_iAPX_86_88_Users_Manual.pdf |title=iAPX 86, iAPX 88 user's manual |access-date=2014-03-19 |archive-url=https://web.archive.org/web/20170522071326/http://bitsavers.informatik.uni-stuttgart.de/pdf/intel/_dataBooks/1981_iAPX_86_88_Users_Manual.pdf |archive-date=2017-05-22 |url-status=dead }}</ref> This was abandoned rather soon, however. The industry around the 8088- and 80286-based [[de facto standard]] of [[IBM PC]] and [[IBM AT]] designs also seldom used that naming scheme. As a result, the iAPX prefix is now, again, more closely associated with the (non-x86) iAPX 432 architecture (which, although a commercial failure, is often seen as historically important).
==List of x86-related iAPX chips and multi-chip system configurations==
* '''iAPX 86'''<ref name="Intel_1984_iAPX186"/><ref name="Intel_1983_iAPX286"/> and '''iAPX 86/10'''<ref name="Intel_1983_iAPX286"/> refer to the [[8086]]<ref name="i86"/>
* '''iAPX 86/11'''<ref name="Intel_1984_iAPX186"/> refers to a combination of [[8086]] and [[8089]] (IOP)
* '''iAPX 86/20'''<ref name="Intel_1983_iAPX286"/> refers to a combination of [[8086]] and [[8087]] (NPX)
* '''iAPX 86/21'''<ref name="Intel_1984_iAPX186"/> refers to a combination of [[8086]], [[8087]] and [[8089]]
* '''iAPX 86/30'''<ref name="Intel_1984_iAPX186"/> refers to a combination of [[8086]] and [[Intel 80130|80130]] (OSP)
* '''iAPX 88'''<ref name="Intel_1984_iAPX186"/><ref name="Intel_1983_iAPX286"/> and '''iAPX 88/10''' refers to the [[8088]]<ref name="i86"/>
* '''iAPX 88/11'''<ref name="Intel_1984_iAPX186"/> refers to a combination of [[8088]] and [[8089]]
* '''iAPX 88/20'''<ref name="Intel_1983_iAPX286"/> refers to a combination of [[8088]] and [[8087]]
* '''iAPX 88/21'''<ref name="Intel_1984_iAPX186"/> refers to a combination of [[8088]], [[8087]] and [[8089]]
* '''iAPX 88/30'''<ref name="Intel_1984_iAPX186"/> refers to a combination of [[8088]] and [[Intel 80130|80130]]
* '''iAPX 186'''<ref name="Intel_1984_iAPX186"/><ref name="Intel_1983_iAPX286"/> and '''iAPX 186/10''' refer to the [[80186]]
* '''iAPX 186/11'''<ref name="Intel_1984_iAPX186"/> refers to a combination of [[80186]] and [[8089]]
* '''iAPX 186/20'''<ref name="Intel_1983_iAPX186"/> refers to a combination of [[80186]] and [[8087]]
* '''iAPX 186/21'''<ref name="Intel_1983_iAPX186"/> refers to a combination of [[80186]], [[8087]] and [[8089]]
* '''iAPX 186/30'''<ref name="Intel_1983_iAPX186"/> refers to a combination of [[80186]] and [[Intel 80130|80130]]
* '''iAPX 186/40'''<ref name="Intel_1983_iAPX186"/> refers to a combination of [[80186]], [[8087]] and [[Intel 80130|80130]]
* '''iAPX 188'''<ref name="Intel_1984_iAPX186"/>  and '''iAPX 188/10''' refer to the [[80188]]
* '''iAPX 188/20'''<ref name="Intel_1984_iAPX186"/> refers to a combination of [[80188]] and [[8087]]
* '''iAPX 188/21'''<ref name="Intel_1984_iAPX186"/> refers to a combination of [[80188]], [[8087]] and [[8089]]
* '''iAPX 188/30'''<ref name="Intel_1984_iAPX186"/> refers to a combination of [[80188]] and [[Intel 80130|80130]]
* '''iAPX 286'''<ref name="Intel_1983_iAPX286"/> and '''iAPX 286/10'''<ref name="Intel_1983_iAPX286"/> refer to the [[80286]]
* '''iAPX 286/20'''<ref name="Intel_1983_iAPX286"/> refers to a combination of [[80286]] and [[80287]]
* '''iAPX 386'''<ref name="Intel_1984_iAPX186"/> refers to the [[80386]]
==List of non-x86 iAPX chips==
* [[Intel iAPX 432]]
* [[Micro Computer Set (disambiguation)|Intel MCS]] (Intel Micro Computer Set)
==References==
{{Reflist|refs=
<ref name="Intel_1983_iAPX186">{{cite book |title=The iAPX 86/88, 186/188 User's Manual - Programmer's Reference |date=May 1983 |edition=1 |publisher=[[Intel Corporation]] |volume=2 |id=Order code 210911-001 |url=https://archive.org/stream/bitsavers_intel801866188ProgrammersReference1983_33392201/210911-001_iAPX86_88_186_188_Programmers_Reference_1983#page/n14/mode/1up}}</ref>
<ref name="Intel_1984_iAPX186">{{cite book |title=iAPX 86, 88, 186 Microprocessors Part I - Workshop Notebook |publisher=[[Intel Corporation]] |date=June 1984 |orig-year=1983 |version=2.0 |volume=1 |id=Order code 210976-002 |url=http://bitsavers.trailing-edge.com/pdf/intel/8086/210976-002_iAPX_86,_88,_186_Microprocessors_Part_I_Ver_2.0_Jun_84_NJ7P-S.pdf |url-status=dead |archive-url=https://web.archive.org/web/20170524072600/http://bitsavers.trailing-edge.com/pdf/intel/8086/210976-002_iAPX_86,_88,_186_Microprocessors_Part_I_Ver_2.0_Jun_84_NJ7P-S.pdf |archive-date=2017-05-24}}</ref>
<ref name="Intel_1983_iAPX286">{{cite book |title=iAPX 286 Programmer's Reference Manual |publisher=[[Intel Corporation]] |location=Santa Clara, CA, USA |date=1983 |edition=1 |id=Order code 210498-001 |page=1-1 |url=http://bitsavers.trailing-edge.com/pdf/intel/80286/210498-001_1983_iAPX_286_Programmers_Reference_1983.pdf |url-status=dead |archive-url=https://web.archive.org/web/20141129025434/http://bitsavers.trailing-edge.com/pdf/intel/80286/210498-001_1983_iAPX_286_Programmers_Reference_1983.pdf |archive-date=2014-11-29}}</ref>
}}
==Further reading==
* {{cite book |title=Software Handbook |date=1984 |orig-date=1983 |publisher=[[Intel Corporation]] |id=230786-001 |url=http://bitsavers.trailing-edge.com/components/intel/_dataBooks/230786-001_Intel_Software_Handbook_1984.pdf |access-date=2020-01-29 |url-status=live |archive-url=https://web.archive.org/web/20200129010534/http://bitsavers.trailing-edge.com/components/intel/_dataBooks/230786-001_Intel_Software_Handbook_1984.pdf |archive-date=2020-01-29}}
[[Category:Intel microprocessors]]