4.1 BSD - Revision history

Jnc: proper cat

2018-06-17T16:23:12Z

proper cat

Jnc: Detail on interim 4.1x letter releases

2017-02-04T19:56:34Z

Detail on interim 4.1x letter releases

Neozeed: add in reference to the John Chambers & John Quarterman paper.

2016-02-03T03:33:06Z

add in reference to the John Chambers & John Quarterman paper.

Neozeed: some additional bit from archive.org

2016-02-03T03:23:16Z

some additional bit from archive.org

Neozeed: link to the 4.1c install guide.

2016-02-03T00:30:01Z

link to the 4.1c install guide.

Neozeed: add some notes from 25 years of UNIX which adds some notes on the 4.1 BSD's.

2016-02-02T07:47:40Z

add some notes from 25 years of UNIX which adds some notes on the 4.1 BSD's.

Neozeed: fix braces

2016-02-02T05:36:13Z

fix braces

Neozeed: move my notes into a dedicated tutorial page.

2016-02-02T05:35:52Z

move my notes into a dedicated tutorial page.

Neozeed: added info on the 1981 tape I found on bitsavers

2016-02-01T10:43:36Z

added info on the 1981 tape I found on bitsavers

Tor: Minor fixes, added category

2013-05-15T14:02:25Z

Minor fixes, added category

@@ Line 10: / Line 10: @@
 }}
-This version addressed many of the performance shortcomings in [[4.0 BSD]] that were brought up in a VMS vs BSD paper.  Many of the changes are outlined in [[Bug fixes and changes in 4.1bsd]].  One of the big points of 4.1 is that it supported the [[VAX-11/750]], which became a workhorse favorite of the DoD, which in turn led to DARPA grants to the [[CSRG]] to continue developing BSD.  The 4.1 BSD kernel was systematically tuned up by Bill Joy until it could perform as well as [[VMS]] on several benchmarks.
+This version of [[BSD]] addressed many of the performance shortcomings in [[4.0 BSD]] that were brought up in a VMS vs BSD paper.  Many of the changes are outlined in [[Bug fixes and changes in 4.1bsd]]. One of the big points of 4.1 is that it supported the [[VAX-11/750]], which became a workhorse favorite of the DoD, which in turn led to DARPA grants to the [[CSRG]] to continue developing BSD. The 4.1 BSD [[kernel]] was systematically tuned up by Bill Joy until it could perform as well as [[VMS]] on several benchmarks.
 The release would have been called 5BSD, but after objections from AT&T the name was changed; AT&T feared confusion with [[Unix SYSV|AT&T's UNIX System V]].
@@ Line 55: / Line 55: @@
 .1b This was a test release, used only a Berkley and it includes the new Fast File System, using clustering for much improved performance, and contained the netw networking code.
-.1c 1982/1983 The thrid test release between 4.1BSD and 4.2BSD, it was distributed to about 100 sites and includes most 4.2 features except for the new signal facility.  There is a detailed paper [[UNIX* System V and 4.1C BSD]] written by John Chambers & John Quarterman, that details 4.1c BSD.
+.1c 1982/1983 The third test release between 4.1BSD and 4.2BSD, it was distributed to about 100 sites and includes most 4.2 features except for the new signal facility.  There is a detailed paper [[UNIX* System V and 4.1C BSD]] written by John Chambers & John Quarterman, that details 4.1c BSD.
 {{Nav Unix}}
-[[Category:CSRG BSD]]
-[[Category:Operating Systems]]
+[[Category: CSRG BSD]]

@@ Line 10: / Line 10: @@
 }}
-This version addressed many of the performance shortcomings in [[4.0 BSD]] that were brought up in a VMS vs BSD paper.  Many of the changes are outlined in [[Bug fixes and changes in 4.1bsd]].  One of the big points of 4.1 is that it supported the [[VAX-11/750]], which became a workhorse favorite of the DoD, which in turn led to DARPA grants to the [[CSRG]] to continue developing BSD.  The 4.1 BSD kernel was systematically tuned up by Bill Joy until it could perform as well as [[VMS]] on several benchmarks. The release would have been called 5BSD, but after objections from AT&T the name was changed; AT&T feared confusion with [[Unix SYSV|AT&T's UNIX System V]].
+This version addressed many of the performance shortcomings in [[4.0 BSD]] that were brought up in a VMS vs BSD paper.  Many of the changes are outlined in [[Bug fixes and changes in 4.1bsd]].  One of the big points of 4.1 is that it supported the [[VAX-11/750]], which became a workhorse favorite of the DoD, which in turn led to DARPA grants to the [[CSRG]] to continue developing BSD.  The 4.1 BSD kernel was systematically tuned up by Bill Joy until it could perform as well as [[VMS]] on several benchmarks.
 Other features included:
@@ Line 20: / Line 22: @@
 .1 BSD, June 1981 4BSD was upgraded to include many performance improvements, support for a new VAX model and autoconfiguration.
-Once DARPA was funding the development of BSD, it lead to 2 big improvments from 4.1 to 4.2 which included [[FFS]], and [[TCP/IP]].  From what I understand 4.1a includes the BBN stack, but on a 750, it only can perform at 56kb on Ethernet, and maximizes the CPU to 100%, whereas Bill Joy's TCP/IP could get upwards of 700k/sec.
+Once DARPA was funding the development of BSD, it lead to 2 big improvements from 4.1 to 4.2: the adddition of [[TCP/IP]], and the new [[BSD Fast File System]]. These were beta-released in three intermediate versions: 4.1a included [[BBN]]'s preliminary [[TCP/IP]] implementation; 4.1b included the new FFS; and 4.1c was an interim release of what became [[4.2 BSD]], during the last few months of its development.
 == Getting this to run ==
 === 4.1 ===
 A tape image for 4.1 has surfaced on [[bitsavers]], named [http://bitsavers.trailing-edge.com/bits/UCB_CSRG/4.1_BSD_19810710.zip 4.1_BSD_19810710.zip]  The bootblock programs do not run under SIMH using the [[4.0 BSD]] strategy, however it is possible to swap tapes when restoring the root slice, and then restoring the tars.  Using this modified tape, I've created an installation guide [[Installing 4.1 BSD on SIMH]].

@@ Line 50: / Line 50: @@
 .1b This was a test release, used only a Berkley and it includes the new Fast File System, using clustering for much improved performance, and contained the netw networking code.
-.1c 1982/1983 The thrid test release between 4.1BSD and 4.2BSD, it was distributed to about 100 sites and includes most 4.2 features except for the new signal facility.
+.1c 1982/1983 The thrid test release between 4.1BSD and 4.2BSD, it was distributed to about 100 sites and includes most 4.2 features except for the new signal facility.  There is a detailed paper [[UNIX* System V and 4.1C BSD]] written by John Chambers & John Quarterman, that details 4.1c BSD.
 {{Nav Unix}}
 [[Category:CSRG BSD]]
 [[Category:Operating Systems]]

@@ Line 10: / Line 10: @@
 }}
-This version addressed many of the performance shortcomings in [[4.0 BSD]] that were brought up in a VMS vs BSD paper.  Many of the changes are outlined in [[Bug fixes and changes in 4.1bsd]].  One of the big points of 4.1 is that it supported the [[VAX-11/750]], which became a workhorse favorite of the DoD, which in turn led to DARPA grants to the [[CSRG]] to continue developing BSD.
+This version addressed many of the performance shortcomings in [[4.0 BSD]] that were brought up in a VMS vs BSD paper.  Many of the changes are outlined in [[Bug fixes and changes in 4.1bsd]].  One of the big points of 4.1 is that it supported the [[VAX-11/750]], which became a workhorse favorite of the DoD, which in turn led to DARPA grants to the [[CSRG]] to continue developing BSD.  The 4.1 BSD kernel was systematically tuned up by Bill Joy until it could perform as well as [[VMS]] on several benchmarks. The release would have been called 5BSD, but after objections from AT&T the name was changed; AT&T feared confusion with [[Unix SYSV|AT&T's UNIX System V]].
 Other features included:

@@ Line 27: / Line 27: @@
 === 4.1c ===
-There is two tape images on bitsavers [http://bitsavers.trailing-edge.com/bits/UCB_CSRG/4.1C_BSD_1of2.zip 4.1C BSD 1 of 2], and [http://bitsavers.trailing-edge.com/bits/UCB_CSRG/4.1C_BSD_2of2.zip 4.1C BSD 2 of 2].  I'm working on trying to install them to [[SIMH]].
+There is two tape images on bitsavers [http://bitsavers.trailing-edge.com/bits/UCB_CSRG/4.1C_BSD_1of2.zip 4.1C BSD 1 of 2], and [http://bitsavers.trailing-edge.com/bits/UCB_CSRG/4.1C_BSD_2of2.zip 4.1C BSD 2 of 2].  A much needed to revise guide is available [[Installing 4.1c BSD on SIMH]].
 == Games ==

@@ Line 17: / Line 17: @@
 * automatic kernel config
 * vfork()
 == Getting this to run ==
-So far nothing, all the information I've been able to find is in the CSRG CD-ROM.  I suspect overlaying a 4.0 system with 4.1 files may work....
+=== 4.1 ===
 == Games ==
-From what I see on the CD-ROM...
+These are what is available on the 1981 tape:
 <pre>
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