https://rs-485.com/index.php?action=history&feed=atom&title=HIL_busHIL bus - Revision history2026-05-04T13:48:44ZRevision history for this page on the wikiMediaWiki 1.42.3https://rs-485.com/index.php?title=HIL_bus&diff=576&oldid=prevRS-485: Imported from Wikipedia (overwrite)2026-05-02T18:13:13Z<p>Imported from Wikipedia (overwrite)</p>
<p><b>New page</b></p><div>{{Notconfuse|HP-IL}}<br />
[[Image:Hp hil adapter.jpg|thumb|HP HIL Adapter, which allows standard [[PC keyboard]]s and [[Computer mouse|mice]] to be added to an HIL host. Note the pass-through port on the right, which allowed other HIL devices to be daisy-chained through this one.]]<br />
[[File:Locale_RS6_HP-HP9000-310-Workstation 19 (cropped).jpg|thumb|upright=1.5|A HP-HIL connector for keyboards next to a [[HP-IB]] connector on an [[HP9000]]-310 [[workstation]]]]<br />
The '''HP-HIL''' (''Hewlett-Packard Human Interface Link'') is the name of a [[computer bus]] used by [[Hewlett-Packard]] to connect keyboards, mice, [[trackball]]s, digitizers, tablets, barcode readers, rotary knobs, touchscreens, and other human interface peripherals to their [[HP 9000]] workstations. The bus was in use until the mid-1990s, when HP substituted [[PS/2 connector|PS/2]] technology for HIL. The PS/2 peripherals were themselves replaced with [[Universal Serial Bus|USB]]-connected models.<br />
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The HIL bus is a [[daisy chain (electrical engineering)|daisy-chain]] of up to 7 devices, running at a raw clock speed of 8&nbsp;MHz. Each HIL device typically has an output connector, and an input connector to which the next device in the chain plugs; the exception is the mouse which has only the output connector.<br />
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HIL buses can be found on HP [[PA-RISC]] and [[m68k]] based machines, some early [[HP Vectra]] computers, as well as in some HP/Agilent [[Logic Analyzers]]. [[HP-UX]], [[OpenBSD]], [[Linux]] and [[NetBSD]] include drivers for the HIL bus and HIL devices.<br />
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The HP-HIL bus uses specific 4-pin, 6-pin, or 8-pin [[SDL connector]]s, somewhat similar to the [[8P8C]] 8-pin [[modular connector]] commonly (though incorrectly) called the [[Registered jack|RJ-45]]. The bus can reportedly also use a 9-pin [[D-subminiature]] DE-9 connector. <br />
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A HIL to PS/2 converter is available, namely the HP A4220-62001.<br />
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==Specification==<br />
* [http://bitsavers.org/pdf/hp/hp-hil/45918A-90001_HP-HIL_Technical_Reference_Manual_Jan86.pdf HP-HIL Technical Reference Manual], HP P/N 45918A<br />
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==External links==<br />
{{refbegin}}<br />
*{{cite journal |author=Starr, Robert R. |title=The Hewlett-Packard Human Interface Link |journal=Hewlett-Packard Journal |volume=38 |issue=6 |pages=8–12 |date=June 1987 |url=http://www.hparchive.com/Journals/HPJ-1987-06.pdf |format=PDF}}<br />
*{{cite book |author= Hewlett-Packard |title=HP-HIL Technical Reference Manual | id=HP Part No.: 45918A|url=http://bitsavers.informatik.uni-stuttgart.de/pdf/hp/hp-hil/45918A-90001_HP-HIL_Technical_Reference_Manual_Jan86.pdf |format=PDF}}<br />
*{{cite book |author=Hewlett-Packard |chapter=hil(7) — HP-HIL device driver |chapter-url=http://docs.hp.com/en/B2355-90684/hil.7.html |title=HP-UX Reference Release 11.0 |id=HP Part No.: B2355-90684 |year=1997 |url=http://docs.hp.com/en/B2355-90684/index.html |volume=5}}<br />
*[https://web.archive.org/web/20160808103222/http://abrij.org/~bri/hw/hil.txt HP HIL Linux driver suite]<br />
*[http://www.hpmuseum.net/display_item.php?hw=217 Vectra RS/20 with HIL]<br />
{{refend}}<br />
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{{Computer-bus}}<br />
{{Hewlett-Packard}}<br />
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[[Category:Serial buses]]<br />
[[Category:Hewlett-Packard products]]<br />
[[Category:Human–computer interaction]]<br />
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