Editing Human Interface Link

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'''Human Interface Link''' (HIL) is a bus protocol by [[Hewlett-Packard]] for connecting various input devices to their HP 9000-series workstations. It was replaced by PS/2 in the mid-90's.

Devices can be connected in series.

The connectors are 4,6 or 8-pin SDL, with connectors keyed differently for upstream and downstream ports.

It uses 12V voltage, which is a reason why few attempts at building a converter with 5VDC microcontrollers have been attempted.

==Forum threads==
* Deskthority—[https://deskthority.net/viewtopic.php?f=7&t=23968 HP-HIL]. An effort at reverse-engineering the protocol and building a converter for it.

==External links==
* [http://en.wikipedia.org/wiki/HIL_bus HIL bus on Wikipedia]

[[Category:Keyboard protocols and interfaces]]