CB-UNIX - Revision history

Jnc: Add some details of the enhancements

2022-12-29T23:31:54Z

Add some details of the enhancements

Jnc: PDP-11 only

2021-10-06T01:49:18Z

PDP-11 only

Jnc: Correct history errors from Pirzada

2021-10-03T22:48:18Z

Correct history errors from Pirzada

Jnc: typos

2021-10-03T00:59:17Z

typos

Jnc: Again, pretty stubby

2021-10-02T18:15:50Z

Again, pretty stubby

New page

'''CB-UNIX''' was one of three parallel variants of early [[UNIX]] inside the Bell System, along with [[USG UNIX]] and [[PWB/UNIX]]. It came out of the Operations System Group (OSG) in Columbus, Ohio.

Apparently initially based on [[UNIX Version 6]], for te [[PDP-11]] (although at the end of its life it did run on [[VAX]]en), it had changes and extensions to the [[kernel]] make it more suitable for use in control applications, including [[real-time]] systems (unlike the other two, which were primarily intended for computer center type usage).

Major enhancements included extensive inter-[[process]] communication (in part via [[semaphore]]s, and shared memory mechanisms) and [[file]] locking, which were considered essential for database management systems; it also had contributions in the areas of power failure recovery.

Releases included:

* Edition 1.0 - mid 1977
* Edition 2.0 - January 1979
* Edition 2.1 - January 1980
* Edition 2.2 - January 1981
* Edition 2.3 - mid 1981

The three different systems (which had by then diverged slightly), along with (by then [[portable]]) [[Unix Seventh Edition]] from the Research group, were eventually unified as [[Unix SYSIII]], in June, 1980.

{{semi-stub}}

==External links==

* [https://www.tuhs.org/Archive/Distributions/USDL/CB_Unix/ CB-INIX] - documentation
* [https://www.tuhs.org/Archive/Distributions/USDL/CB_Unix/SourceCode/ Source Code] - source (scan of kernel listings)

{{Nav Unix}}

[[Category: Unix OS's]]

@@ Line 1: / Line 1: @@
-'''CB-UNIX''' was one of three parallel variants of early [[UNIX]]  inside the Bell System, along with [[USG UNIX]] and [[PWB/UNIX]]. It came out of the Operations System Group (OSG) in Columbus, Ohio.
+'''CB-UNIX''' was one of three parallel variants of early [[UNIX]] inside the Bell System, along with [[USG UNIX]] and [[PWB/UNIX]]. It came out of the Operations System Group (OSG) in Columbus, Ohio.
-It only ever ran on the [[PDP-11]]; it was initially based on an early [[C programming language|C]] version of the system (possibly [[UNIX Version 5]] or [[UNIX Version 6]]). CB-UNIX had changes and extensions to the [[kernel]] to make it more suitable for use in control applications, including [[real-time]] systems (unlike the other two, which were primarily intended for computer center type usage). Major enhancements included extensive inter-[[process]] communication (in part via [[semaphore]]s, and shared memory mechanisms) and [[file]] locking, which were considered essential for database management systems; it also had contributions in the areas of power failure recovery.
+It only ever ran on the [[PDP-11]]; it was initially based on an early [[C programming language|C]] version of the system (possibly [[UNIX Version 5]] or [[UNIX Version 6]]). CB-UNIX had changes and extensions to the [[kernel]] to make it more suitable for use in control applications, including [[real-time]] systems (unlike the other two, which were primarily intended for computer center type usage).
 ==History==
@@ Line 7: / Line 45: @@
 The lineage that eventually led to CB-UNIX came from the Switching Control Center Systems group in Holmdel, New Jersey. Very early on, a small group there utilized an [[assembly language]] version of UNIX, probably [[UNIX Second Edition]] or so, running on a [[PDP-11/20]], to collect maintenance data from early computerized telephone switches (ESS). It was the first group other than the patent office to use UNIX.
-The SCCS group was transferred to Columbus, Ohio in the fall of 1974, and continued to expand their application. Other Operating Support Systems began to be developed in Columbus, and they also used the UNIX variant that had been developed by SCCS. Rather than have each OSS have its own UNIX, the CB-OSG (Columbus Operating Systems Group) was formed in January of 1977. Their UNIX was CB-UNIX.
+The SCCS group was transferred to Columbus, Ohio in the fall of 1974, and continued to expand their application. Other Operating Support Systems began to be developed in Columbus, and they also used the UNIX variant that had been developed by SCCS. Rather than have each OSS have its own UNIX, the CB-OSG (Columbus Operating Systems Group) was formed in January of 1977; their UNIX was CB-UNIX.
 Releases included:
@@ Line 17: / Line 55: @@
 *  Edition 2.3 - mid 1981
-The three different systems (which had by then diverged slightly), along with (by then [[portable]]) [[Unix Seventh Edition]] from the Research group, were eventually unified as [[Unix SYSIII]], in June, 1980.
+The three different systems (which had by then diverged slightly), along with the (by then [[portable]]) [[Unix Seventh Edition]] from the Research group, were eventually unified as [[UNIX System III]], in June, 1980.
 {{semi-stub}}
@@ Line 23: / Line 61: @@
 ==External links==
 * [https://www.tuhs.org/Archive/Distributions/USDL/CB_Unix/SourceCode/ Source Code] - source (scan of kernel listings)
 {{Nav Unix}}
 [[Category: Unix OS's]]

@@ Line 1: / Line 1: @@
 '''CB-UNIX''' was one of three parallel variants of early [[UNIX]]  inside the Bell System, along with [[USG UNIX]] and [[PWB/UNIX]]. It came out of the Operations System Group (OSG) in Columbus, Ohio.
-Apparently initially based on an early [[C programming language|C]] version of the system (possibly [[UNIX Version 5]] or [[UNIX Version 6]]), for the [[PDP-11]] (although at the end of its life it did run on [[VAX]]en), CB-UNIX had changes and extensions to the [[kernel]] to make it more suitable for use in control applications, including [[real-time]] systems (unlike the other two, which were primarily intended for computer center type usage).
+It only ever ran on the [[PDP-11]]; it was initially based on an early [[C programming language|C]] version of the system (possibly [[UNIX Version 5]] or [[UNIX Version 6]]). CB-UNIX had changes and extensions to the [[kernel]] to make it more suitable for use in control applications, including [[real-time]] systems (unlike the other two, which were primarily intended for computer center type usage). Major enhancements included extensive inter-[[process]] communication (in part via [[semaphore]]s, and shared memory mechanisms) and [[file]] locking, which were considered essential for database management systems; it also had contributions in the areas of power failure recovery.
 ==History==