Difference between revisions of "Chaosnet"
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'''Chaosnet''' was the name for both an [[internetworking]] [[protocol suite|protocol family]], and an early [[Local area network|LAN]] technology, both invented at the [[MIT AI Laboratory]]; the latter was the LAN on which the protocol first ran. | '''Chaosnet''' was the name for both an [[internetworking]] [[protocol suite|protocol family]], and an early [[Local area network|LAN]] technology, both invented at the [[MIT AI Laboratory]]; the latter was the LAN on which the protocol first ran. | ||
| − | The LAN was a [[CSMA-CD]] system modeled on the [[Xerox PARC]] 3 megabit/second [[Ethernet]], running over [[cable TV]] cable. The protocol was later made to run over standard 10 megabit/second Ethernet, which largely supplanted the Chaosnet hardware. (On Ethernet, the [[Address Resolution Protocol]] is required to provide [[mapping]]s from 16-[[bit]] Chaos [[address]]es to the [[Media Access Control Address|48-bit addresses]] used by Ethernet.) | + | The LAN was a [[Carrier-Sense Multiple Access with Collision Detection|CSMA-CD]] system modeled on the [[Xerox PARC]] 3 megabit/second Experimental [[Ethernet]], running over [[cable TV]] [[coaxial cable]] (using standard CATV connectors to connect the [[transceiver]]s; not vampire taps, as on the Experimental Ethernet). |
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| + | The protocol was later made to run over standard 10 megabit/second Ethernet, which largely supplanted the Chaosnet hardware. (On Ethernet, the [[Address Resolution Protocol]] is required to provide [[mapping]]s from 16-[[bit]] Chaos [[address]]es to the [[Media Access Control Address|48-bit addresses]] used by Ethernet.) | ||
The protocol provided a [[reliable byte stream]] service, but also had a [[datagram]] mode. | The protocol provided a [[reliable byte stream]] service, but also had a [[datagram]] mode. | ||
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* [[MagicSix]] | * [[MagicSix]] | ||
* [https://github.com/bictorv/chaosnet-bridge Chaosnet Bridge] | * [https://github.com/bictorv/chaosnet-bridge Chaosnet Bridge] | ||
| − | * Oswalds's [http://josephoswald.nfshost.com/chaos-python/summary.html Python] and [http://josephoswald.nfshost.com/chaos-lisp/summary.html Lisp] implementations | + | * Oswalds's [http://josephoswald.nfshost.com/chaos-python/summary.html Python] and [http://josephoswald.nfshost.com/chaos-lisp/summary.html Lisp] implementations |
| − | * Linux | + | * [[Linux]] |
== Hardware, and simulations == | == Hardware, and simulations == | ||
Revision as of 13:47, 14 July 2022
Chaosnet was the name for both an internetworking protocol family, and an early LAN technology, both invented at the MIT AI Laboratory; the latter was the LAN on which the protocol first ran.
The LAN was a CSMA-CD system modeled on the Xerox PARC 3 megabit/second Experimental Ethernet, running over cable TV coaxial cable (using standard CATV connectors to connect the transceivers; not vampire taps, as on the Experimental Ethernet).
The protocol was later made to run over standard 10 megabit/second Ethernet, which largely supplanted the Chaosnet hardware. (On Ethernet, the Address Resolution Protocol is required to provide mappings from 16-bit Chaos addresses to the 48-bit addresses used by Ethernet.)
The protocol provided a reliable byte stream service, but also had a datagram mode.
History
Chaosnet was initially called CAIOSnet.
Implementations
- LISP machines
- ITS
- TOPS-20
- FOONEX
- VAX/VMS
- BSD Unix
- MINITS
- PDP-11 Unix V7
- Unix V8
- MagicSix
- Chaosnet Bridge
- Oswalds's Python and Lisp implementations
- Linux
Hardware, and simulations
- KLH10 simulates a CH11
- SIMH's KS10, PDP-11, and VAX simulate a CH11
- SIMH's KA10 and KL10 simulates a CH10
External links
- AI memo 628 - Includes chapters on ITS, TOPS-20, Lisp Machine, and Unix implementations.
- SYSDOC;CHAORD > - Initial design
- MOON;AMBER > - Another Moon document
- Chaosnet - Detailed descriptions of both the hardware system, and the protociol(s)
- CHAOS; - hardware interface designs, etc.
- CHAOS;CHAOS PLANS - interesting details of the physical installation at MIT
