IMP interface: Difference between revisions

Revision as of 14:46, 13 November 2021

An IMP interface is a device controller used on a host (i.e. on its bus) to attach them to systems which used the special 1822 communication interface (defined in BBN Report No. 1822); these included initially the IMPs of the ARPANET (hence the name), and later the PRUs of the Packet Radio Network‎.

Some of the most popular IMP interfaces were:

but there were many others (many being 'one-off' local creations).

This article is not as complete coverage of the topic as it could be. You can help by expanding it.

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 * GIMPSPIF, used by 645 [[Multics]], for [[Network Control Program|NCP]]
 * ABSI, used by [[Honeywell 6000 series|6180]] Multics, for NCP and [[Internet Protocol|IP]]
-* [[Xerox Alto|Alto]] interface, used on the [[Maxc|Maxc2]] [[front end]] to connect to the [[ARPANET]] for NCP, on [[PARC Universal Packet|PUP]] [[router|gateways]] to talk to [[Packet Radio Network‎|PRUs]], and apparently eventually on the Alto ARPANET IP gateway
+* [[Alto-1822 Interface]] for the [[Xerox Alto|Alto]], used in a variety of ways
 but there were many others (many being 'one-off' local creations).
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 * [http://www.bitsavers.org/pdf/bbn/imp/BBN1822_Jan1976.pdf Specification for the Interconnection of a Host and an IMP] - BBN Report #1822
-* [https://xeroxalto.computerhistory.org/Indigo/Alto-1822/.index.html Alto 1822 interface information]
 [[Category: 1822 Interfaces‎]]