Computer Interconnect - Revision history

Jnc: /* Further reading */ +Description in VAX Hardware Handbook

2024-06-03T16:11:32Z

‎Further reading: +Description in VAX Hardware Handbook

Jnc: /* See also */ Avoid redir

2024-05-23T22:41:30Z

‎See also: Avoid redir

Jnc: /* See also */ Avoid redir; DEC full name for CI780

2024-05-14T18:42:43Z

‎See also: Avoid redir; DEC full name for CI780

Jnc: First element implemented

2024-05-01T12:50:10Z

First element implemented

Vaxorcist: Role of "System Communication Architecture" added

2024-04-29T19:26:21Z

Role of "System Communication Architecture" added

Jnc: /* See also */ +DEC CI Hierarchical Storage Controllers

2024-04-22T15:02:02Z

‎See also: +DEC CI Hierarchical Storage Controllers

Jnc: +New category

2024-01-14T12:56:12Z

+New category

Jnc: New category

2024-01-10T20:13:34Z

New category

Vaxorcist: CI20 named

2023-10-08T11:08:43Z

CI20 named

Vaxorcist: Cat "CI Hierarchical Storage Controllers" added

2023-08-22T06:42:33Z

Cat "CI Hierarchical Storage Controllers" added

@@ Line 25: / Line 25: @@
 * [[CIPCA]] - [[Peripheral Component Interconnect|PCI]] CI Interface
 * [[DEC CI Hierarchical Storage Controllers]]
 ==External links==

@@ Line 17: / Line 17: @@
 * [[CI780 Computer Interconnect Adapter|CI780 VAX-11/780 CI Interface]]
 * [[CI750 Computer Interconnect Interface|CI750 VAX-11/750 CI Interface]]
-* [[CIBCI]] - [[VAX Bus Interconnect|VAXBI]] CI Interface, 1st generation
+* [[CIBCI Computer Interconnect Adapter|CIBCI]] - [[VAX Bus Interconnect|VAXBI]] CI Interface, 1st generation
 * [[CIBCA-A]] - VAXBI CI Interface, 2nd generation
 * [[CIBCA-B]] - VAXBI CI Interface, 3rd generation

@@ Line 15: / Line 15: @@
 * [[CISCE CI Star Coupler Extension]] 16 Nodes max.
 * [[CI20 Computer Interconnect|CI20 KL10 CI Interface]]
-* [[CI780 Computer Interconnect Interface|CI780 VAX-11/780 CI Interface]]
+* [[CI780 Computer Interconnect Adapter|CI780 VAX-11/780 CI Interface]]
 * [[CI750 Computer Interconnect Interface|CI750 VAX-11/750 CI Interface]]
 * [[CIBCI]] - [[VAX Bus Interconnect|VAXBI]] CI Interface, 1st generation

← Older revision		Revision as of 12:50, 1 May 2024
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−	The '''Computer Interconnect''' (usually given as the acronym, '''CI''') is a high-speed [[packet]]ized [[data network]]ing system from [[Digital Equipment Corporation\|DEC]]; basically a fairly short-range [[local area network\|LAN]]; it was the first ~~implementation~~ of DEC's [[System Communication Architecture]].	+	The '''Computer Interconnect''' (usually given as the acronym, '''CI''') is a high-speed [[packet]]ized [[data network]]ing system from [[Digital Equipment Corporation\|DEC]]; basically a fairly short-range [[local area network\|LAN]]; it was the first element of DEC's [[System Communication Architecture]] to be implemented.

	It consists of uni-directional point-point links, all running between an interface on each [[host]] (called 'nodes' in the CI system) and a 'coupler'. The network's physical topology is thus a star (an approach pioneered by [[MIT Laboratory for Computer Science\|LCS]]'s [[Version 1 ring]]), but electrically and logically, it is a linear bus, like the [[Ethernet]]. It too uses [[Carrier-Sense Multiple Access with Collision Detection\|CSMA]] for access control to the shared transmission medium, but different in detail from that of the Ethernet.		It consists of uni-directional point-point links, all running between an interface on each [[host]] (called 'nodes' in the CI system) and a 'coupler'. The network's physical topology is thus a star (an approach pioneered by [[MIT Laboratory for Computer Science\|LCS]]'s [[Version 1 ring]]), but electrically and logically, it is a linear bus, like the [[Ethernet]]. It too uses [[Carrier-Sense Multiple Access with Collision Detection\|CSMA]] for access control to the shared transmission medium, but different in detail from that of the Ethernet.

← Older revision		Revision as of 19:26, 29 April 2024
Line 1:		Line 1:
−	The '''Computer Interconnect''' (usually given as the acronym, '''CI''') is high-speed [[packet]]ized [[data network]]ing system from [[Digital Equipment Corporation\|DEC]]; basically a fairly short-range [[local area network\|LAN]].	+	The '''Computer Interconnect''' (usually given as the acronym, '''CI''') is a high-speed [[packet]]ized [[data network]]ing system from [[Digital Equipment Corporation\|DEC]]; basically a fairly short-range [[local area network\|LAN]]; it was the first implementation of DEC's [[System Communication Architecture]].

	It consists of uni-directional point-point links, all running between an interface on each [[host]] (called 'nodes' in the CI system) and a 'coupler'. The network's physical topology is thus a star (an approach pioneered by [[MIT Laboratory for Computer Science\|LCS]]'s [[Version 1 ring]]), but electrically and logically, it is a linear bus, like the [[Ethernet]]. It too uses [[Carrier-Sense Multiple Access with Collision Detection\|CSMA]] for access control to the shared transmission medium, but different in detail from that of the Ethernet.		It consists of uni-directional point-point links, all running between an interface on each [[host]] (called 'nodes' in the CI system) and a 'coupler'. The network's physical topology is thus a star (an approach pioneered by [[MIT Laboratory for Computer Science\|LCS]]'s [[Version 1 ring]]), but electrically and logically, it is a linear bus, like the [[Ethernet]]. It too uses [[Carrier-Sense Multiple Access with Collision Detection\|CSMA]] for access control to the shared transmission medium, but different in detail from that of the Ethernet.

← Older revision		Revision as of 12:56, 14 January 2024
Line 33:		Line 33:
	[[Category: DEC Networking]]		[[Category: DEC Networking]]
	[[Category: Computer Interconnect]]		[[Category: Computer Interconnect]]
		+	[[Category: DEC Interface Standards]]

← Older revision		Revision as of 20:13, 10 January 2024
Line 32:		Line 32:

	[[Category: DEC Networking]]		[[Category: DEC Networking]]
−	[[Category:~~CI Hierarchical Storage Controllers~~]]	+	[[Category: Computer Interconnect]]

@@ Line 3: / Line 3: @@
 It consists of uni-directional point-point links, all running between an interface on each [[host]] (called 'nodes' in the CI system) and a 'coupler'. The network's physical topology is thus a star (an approach pioneered by [[MIT Laboratory for Computer Science|LCS]]'s [[Version 1 ring]]), but electrically and logically, it is a linear bus, like the [[Ethernet]]. It too uses [[Carrier-Sense Multiple Access with Collision Detection|CSMA]] for access control to the shared transmission medium, but different in detail from that of the Ethernet.
-In addition to processors (mostly [[VAX]]en, although there was a CI interface for the [[KL10]]), intelligent [[mass storage]] [[device controller|controllers]] (such as the [[HSC50 Hierarchical Storage Controller|HSC50]]) could be connected to a CI network; this was a key role in the widely-deployed [[VAXcluster]]. [[Acknowledgement]]s are provided by the [[hardware]]; if one is not received, a [[retransmission]] can be performed.
+In addition to processors (mostly [[VAX]]en, although there was the [[CI20 Computer Interconnect]] for the [[KL10]]), intelligent [[mass storage]] [[device controller|controllers]] (such as the [[HSC50 Hierarchical Storage Controller|HSC50]]) could be connected to a CI network; this was a key role in the widely-deployed [[VAXcluster]]. [[Acknowledgement]]s are provided by the [[hardware]]; if one is not received, a [[retransmission]] can be performed.
 Node [[address]]es are 8 bits; so the [[address space]] could hold up to 256 nodes. The initial coupler (the [[SC008 Star Coupler]]) - a passive one - supported up to 16 links. All CI links are duplicated, for robustness. (Later versions used them separately, to double the capacity.) Thus, each host has 4 links to it; two transmit, and two receive.

← Older revision		Revision as of 06:42, 22 August 2023
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	[[Category: DEC Networking]]		[[Category: DEC Networking]]
		+	[[Category:CI Hierarchical Storage Controllers]]