Difference between revisions of "Coherent"

From Computer History Wiki
Jump to: navigation, search
m (Separate cat)
m (+links)
 
Line 1: Line 1:
 
[[Image:Coherent 4 print ad.jpg|200px|thumb|right|A print Coherent ad]]
 
[[Image:Coherent 4 print ad.jpg|200px|thumb|right|A print Coherent ad]]
  
Coherent was a 'clean room' clone of [[Seventh Edition Unix|Unix v7]], originally written for the PDP-11 in 1980. It was ported to run on the [[IBM PC]] in 1983 and to the [[Zilog Z8000]]-based [[Commodore 900]] in 1985.
+
'''Coherent''' was a 'clean room' clone of [[Seventh Edition Unix|Unix v7]], originally written for the [[PDP-11]] in 1980. It was [[software port|ported]] to run on the [[IBM-compatible PC|IBM PC]] in 1983 and to the [[Zilog Z8000]]-based [[Commodore 900]] in 1985.
  
Coherent was somewhat famous for being audited by Bell Labs and was vetted to be free of AT&T code. Despite its low price it failed to achieve any significant market share.
+
Coherent was somewhat famous for being audited by [[Bell Labs]] and was vetted to be free of AT&T code. Despite its low price it failed to achieve any significant market share.
  
 
A review from 1991 can be found [http://aplawrence.com/Reviews/coherent_1991.html here]
 
A review from 1991 can be found [http://aplawrence.com/Reviews/coherent_1991.html here]
  
Coherent has been recently [[open source]]ed, under a 3-clause BSD license.
+
Coherent has been recently [[open source]]ed, under a 3-clause [[BSD]] license.
  
 
More information about the source code to Coherent can be found at [http://www.nesssoftware.com/home/mwc/source.php www.nesssoftware.com].
 
More information about the source code to Coherent can be found at [http://www.nesssoftware.com/home/mwc/source.php www.nesssoftware.com].
Line 14: Line 14:
 
Right now the easiest way is to use [[Qemu]].  I've found that a memory size of 8MB is the best, as I had several issues with 12MB. The [[fsck]] of a large [[disk]] during [[bootstrap|boot]] does take a long time, so you need to be patient or use a small disk.
 
Right now the easiest way is to use [[Qemu]].  I've found that a memory size of 8MB is the best, as I had several issues with 12MB. The [[fsck]] of a large [[disk]] during [[bootstrap|boot]] does take a long time, so you need to be patient or use a small disk.
  
{{stub}}
+
{{semi-stub}}
  
 
{{Nav Unix}}
 
{{Nav Unix}}
  
 
[[Category: UNIX Clones]]
 
[[Category: UNIX Clones]]

Latest revision as of 00:09, 19 May 2022

A print Coherent ad

Coherent was a 'clean room' clone of Unix v7, originally written for the PDP-11 in 1980. It was ported to run on the IBM PC in 1983 and to the Zilog Z8000-based Commodore 900 in 1985.

Coherent was somewhat famous for being audited by Bell Labs and was vetted to be free of AT&T code. Despite its low price it failed to achieve any significant market share.

A review from 1991 can be found here

Coherent has been recently open sourceed, under a 3-clause BSD license.

More information about the source code to Coherent can be found at www.nesssoftware.com.

Getting it to run

Right now the easiest way is to use Qemu. I've found that a memory size of 8MB is the best, as I had several issues with 12MB. The fsck of a large disk during boot does take a long time, so you need to be patient or use a small disk.