4.3 BSD Tahoe
Logging into a 4.3 BSD system
|Creator:||CSRG, University of California, Berkeley|
|Architecture:||VAX, Tahoe theoretically portable|
|This Version:||4.3BSD-Tahoe (1988)|
Tahoe follows up on 4.3 BSD in 1988 with plans to ditch the aging (ironically it would be around for 12 more years...) VAX platform with machine independence and a port to the "Tahoe" Power 6/32 platform. No one has any idea what this Tahoe computer is, as it completely disappeared off the face of the planet shortly after. However by introducing the Tahoe port, it helped separate out the VAX specific code, there by allowing 4.3 BSD to become a more portable operating system.
The original announcement is here http://groups.google.com/group/comp.sys.tahoe/browse_thread/thread/e7431a9ef74cd7eb#
Newsgroups: comp.sys.tahoe From: bos...@OKEEFFE.BERKELEY.EDU (Keith Bostic) Date: 15 Jun 88 23:56:31 GMT Local: Wed, Jun 15 1988 6:56 pm Subject: 4.3BSD-tahoe release We are happy to announce the availability of the release of 4.3BSD for the tahoe processors. Attached is a brief summary of the information mailed to all 4.2 and 4.3BSD licensees. This mailing contains all necessary ordering information; if you have not received it by July 5th, please contact our distribution office at +1-415-642-7780. Mike Karels Kirk McKusick Keith Bostic ======================== We are happy to send you information about our June 1988 revision of the Fourth Berkeley Software Distribution, hereafter referred to as the ``4.3BSD tahoe'' distribution. The purpose of this release is to provide 4.3BSD support for the ``tahoe'' processor and to get feedback on some new features and facilities that we expect to include in future Berkeley releases. This distribution is not a standard Berkeley release; it is an interim release intended for testing and evaluation rather than production use by naive users. The distribution is available to users with licenses for the April 1986 4.3BSD release for the VAX. What is the 4.3BSD Tahoe Release? The distribution consists of one 6250 BPI or three 1600 BPI magnetic tapes, certain updated manual pages, and a copy of ``Installing and Operating 4.3BSD on the Tahoe.'' The magnetic tape(s) contain copies of source code and documen- tation for both the VAX and the tahoe, and binaries for the tahoe. On the three-tape 1600 BPI set, parts of the user- contributed software are shipped as compressed archives to save space. The primary purpose of this release is to provide sup- port for the ``tahoe'' processor, the CPU used by Computer Consoles, Inc. (CCI Power 6/32, 6/32SX), and high end lines of Harris (HCX-7 and HCX-9), Unisys (7000/40), and ICL (Clan 7). Support for this processor is derived from the 4.2BSD system done by CCI. Support for new DEC equipment has also been added, including support for the 8250 BI-based CPU and the KDB-50 BI disk controller from Chris Torek, and the QVSS and QDSS display drivers for the MicroVAX II, contributed by Digital Equipment Corporation. We expect to provide support for both the VAX and the tahoe processors in future releases. The major new software systems include the following features: + The TCP and IP code is the same as that recently made available via the ARPANET and Usenet. Several new algorithms are used in TCP, in particular Van Jacobson's slow start and dynamic window size selection algorithms and Phil Karn's modification to the round- trip timing algorithm. These changes increase throughput and reduce congestion and retransmission. Several fixes were made in the handling of IP options and other gateway support. + The file system has been generalized to remove the lim- its on the maximum number of inodes per cylinder group, cylinders per cylinder group, and number of dis- tinguished rotational positions. The kernel and file system utilities operate normally on both new and old format file systems; old kernels treat the new file systems as read-only. This change allows better utili- zation of newer disks with larger numbers of sectors per cylinder. + The system has full support for disk labels that con- tain disk geometry information and partition layout on each disk. Labels are used on disks using the hp or uda drivers on the VAX (hp or ra disks) and all sup- ported disks on the tahoe. The utility to read and write disk labels can be used with the system running multiuser; the labels are used and updated as appropri- ate by newfs, bad144, the kernel and the bootstrap pro- grams. Basic file system parameters are stored in the label so that fsck can locate alternate superblocks. The filesystem and newfs use additional information about the disk geometry that is now available, such as track-to-track skew. + A new general-purpose dynamic memory allocator has been written that can be used by all the kernel subsystems. The design of this allocator takes advantage of known memory usage patterns in the UNIX kernel, using a hybrid strategy that is time-efficient for small allo- cations and space-efficient for large allocations. This allocator replaces most of the previous memory allocation interfaces with a single easy-to-program interface, results in more efficient use of global memory by eliminating partitioned and specialized memory pools, and is quick enough that no performance loss is observed relative to the previous implementa- tions. Most of the kernel memory allocation is now done using this allocator. + The source code has been reorganized to ease support of multiple machine types. + The Olson/Harris/Elz timezone implementation has been added to the system. + Numerous bug fixes and enhancements have been made throughout the system, including new versions of the nameserver named and the routing daemon routed. Several years' backlog of bug fixes have been applied. + We have started a process of identifying the code in the 4.3BSD distribution that is not derived from AT&T code. The copyrights in this code have been changed to indicate that it may be freely distributed if the copy- right notice is retained and that due credit for its origin is given to The Regents of the University of California. Over 1000 files have been identified in this distribution.
How do I get this to run?!
SIMH Installation instructions
- Installation instructions for 4.3 BSD TAHOE can be found here
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