Add a changelog

CHANGELOG

+Version 5.67.0 -- Mars 2019
+===========================
+
+* **Add support for x64 bits OS.
+* **Merge Log and Psys into one codebase.
+* **Clean a lot and remove some unused stuff.
+
+Chipmunk Updates -- March 2003
+==============================
+
+* **OS X Support.** Log, analog, diglog, view, until, and wol known to work
+  under OS X 10.2.4 with Apple's X11.app beta 2.
+
+
+Chipmunk Updates -- September 2001
+==================================
+
+* **Log Stability Improvements.** Many code fixes to improve Log stability
+  (Peter Welch), and Y2K fixes (Michael Godfrey, Peter Welch).
+* **Until Bug Fixes.** Edit-extend editing of label orientation now works on
+  little-endian machines.
+
+Chipmunk Updates -- October 1998
+================================
+
+* **New Bipolar Transistor Models.** NPN2 and PNP2 features full Gummel-Poon
+  model and Early Effect (Tim Edwards, Johns Hopkins).
+* **Port of DEC Alpha/OSF 4.0.** Complements existing DEC Alpha/Linux port
+  (Robert Moniot, Fordham).
+* **Bug fixes.** Minor changes to until.
+
+
+Chipmunk Updates  -- March 1997
+===============================
+
+Improvements and Bug-Fixes
+--------------------------
+
+* **Support for 16/24-bit displays.** TrueColor mode is now supported. Chipmunk
+  programs autoconfigure by default; an environment variable (LOG_COLOR = bw |
+  8bit | 16bit | 24bit) forces a particular depth (Michael Godfrey, Stanford
+  University).
+
+* **New MOS models.** :doc:`New <../document/log/anasim>` MOS transistor gates.
+  (Michael Godfrey, Stanford University).
+* **Scope improvements.** Edge-triggered scope function now works in Diglog (Bob
+  Moniot, Fordham College at Lincoln Center).
+* **Lplot Enhancements.** New Lplot commands (PSFILE and FILE) allow
+  specification of printer and file names (Tobi Delbruck, Caltech and Tim
+  Edwards, Johns Hopkins). Lplot command HEADER now works correctly (Michael
+  Godfrey, Stanford University).
+* **TO/FROM Enhancement.** TO/FROM gate editing improved (Tim Edwards, Johns
+  Hopkins).
+* **Bug fixes.** Memory leak fixed in digital hierarchial simulation (Olivier
+  Teman, Versailles University); reset operation fixed for several analog gates
+  (Joel White, Tufts University).
+
+Ports
+-----
+
+See :doc:`platforms`
+
+* **Linux/Alpha.** New port. (Kazushige Goto, goto@statabo.rim.or.jp)
+* **MachTen.** MachTen port updated (Greg Bond, University of British Columbia)
+* **OS/2.** OS/2 port updated (Michael Godfrey, Stanford University)
+* **AmigaOS** All Chipmunk tools ported to AmigaOS, requires ADE or AmiWin X
+  server. Binary distribution also supported. (Marco Gigante, Pisa University).
+
+Miscellaneous
+-------------
+
+* **New MOS models.** Detailed paper :download:`Adobe PDF, 680 KByte,
+  requires Acroread 3.0 <../document/log/mos.pdf>` explaining the new
+  MOS models (Michael Godfrey, Stanford University, and John Lazzaro,
+  UCB).
+* **Xcircuit** New :doc:`supplementary tool <../document/log/xcircuit>`
+  for printing schematics (Tim Edwards, Johns Hopkins).
+
+Chipmunk Updates  -- May 1996
+=============================
+
+Improvements and Bug-Fixes
+--------------------------
+
+* **Diglog schematic corruption bugfix.** A major bug that caused Diglog to
+  occasionally core dump on large hierarchial circuits has been fixed; Diglog is
+  safer to use for larger projects. [Ingo Cyliax (Indiana University), Lars
+  Larsson (Hamburg U.), Dave Gillespie]
+* **Lower load-averages for Log.** Log no longer runs a unity load average
+  indiscriminantly. If simulation is turned off, an analog circuit is
+  "incomplete," or a diglog circuit is the null schematic, Log will consume few
+  cycles if the user isn't interacting with the program. [Nick Bailey (U. Leeds,
+  UK), Dave Gillespie]
+* **Analog gate improvements.** Bugs in the NPN1 and PNP1 bipolar transistors
+  were found and fixed [Jamie Honan, Australia] as were bugs in the Diode gate
+  [Shudi Gu, Beijing].
+* **XNF file support.** New :doc:`tools <../document/log/logxnf>` for supporting
+  Xilinx designs [Ingo Cyliax (Indiana University)].
+* **Log display support.** When launched on a machine with inadequate or
+  unsupported display hardware, Log reverts to monochrome display instead of
+  core-dumping [Huiling, CSU Fresno]. </UL>
+
+Ports
+-----
+
+See :doc:`platforms`
+
+* **MachTen.** Analog now runs under MachTen, a BSD for MacOS. [James Yang, UC
+  Davis]
+* **Updates for existing platforms.** SGI [John Krivitsky, Curtin University of
+  Technology], FreeBSD [Mark N. Martin, Johns Hopkins], and Linux [Luc Claeys,
+  Belgium, Aubrey Jaffer, MIT] had compatibility problems fixed.
+* **MS-DOS** Alpha release available for the MS-DOS port of Log [Luigi Rizzo and
+  collaborators, University of Pisa, Italy].
+
+
+Documentation
+-------------
+
+* **Diode gate model.** New :doc:`document <../document/log/diode>` explaining
+  the diode gate model in analog. [Jamie Honan, Australia]
+* **Making new Analog gates** New `document <../document/log/newanagate/index>`
+  on adding new gates to Analog.
+
+New Chipmunk Features -- February 1995
+======================================
+
+One major change for 1995 is the conversion of most Chipmunk documentation into
+HTML, and the integration of these files into a unified system with many
+cross-links.
+
+Other major changes are ports to new architectures, and updates to existing
+ports to maintain compatibility with changing operating systems. Here is the
+list of support changes for this release, along with the contributor(s).
+
+* **OS/2.** Mike Godfrey of the Information Systems Laboratory at Stanford
+  University ported the Psys and Log packages to OS/2. Other packages remain to
+  be ported, but the Psys port should make these ports much easier to
+  accomplish.
+* **Sun Solaris 2.X.** Reinhard Koehn of TU-Berlin ported Log and Psys packages
+  to Solaris 2.X running under the SPARC processor architecture. The other tools
+  seem to compile well in the Solaris 2.X environment, but I haven't tested them
+  thoroughly. Solaris 1.X (SunOS 4.X) support is unaffected by this port.
+* **FreeBSD.** Dan Andersson of the Chalmers University of Technology (Sweden)
+  ported the Chipmunk tools to FreeBSD; John Utz at the University of Washington
+  and Luigi Rizzo at the Universita' di Pisa also contributed to the port.
+* **SGI.** Tor Sverre Lande at IFI in Oslo ported the Chipmunk tools to a SGI
+  Challenger, and Michael Morrison of the University of Iowa ported the tools to
+  an SGI machine running IRIX. I combined these two ports, and tested the result
+  on an Indigo. All the tools seem to work, but I haven't tested them
+  thoroughly.
+* **IBM RS/6000.** Fernando Pineda of the Applied Physics Lab at Johns-Hopkins
+  updated the Chipmunk distribution to compile on more recent OS versions for
+  the IBM RS/6000, building on the earlier port by Gary Liu of Caltech. I tested
+  Fernando's port on a RS/6000 and it seemed to work.
+* **Linux.** Geir Harris Hedemark at IFI at Norway, and Jack Zvonik of TRW in
+  Redondo Beach updated the Linux port to work under more recent Slackware
+  distributions.
+* **HP 700 Series.** All Chipmunk tools now compile with gcc on HP 700 series
+  workstations. It's no longer necessary to use the HP compiler, with the
+  extra-cost ANSI option, in order to run Chipmunk on HP 700 series machines.
+
+In addition to these ports, several new features were added to various Chipmunk
+tools:
+
+* **Postscript updates.** All Chipmunk tools now produce encapsulated postscript
+  that is compatible with the psfig macros distributed with TeX. John Platt and
+  Dave Gillespie of Synaptics, Michael Godfrey at ISL, Himanshu R. Pota of ADFA
+  in Australia, and gary@minster.york.ac.uk contributed to these improvements.
+* **Logspc updates.** Harold Levy of Caltech contributed a new version of
+  Logspc, the SPICE netlist tool for Log, that contains new features and bug
+  fixes.
+* **MATLAB support.** Michael Godfrey of ISL contributed a filter program for
+  converting data files produced by Log into files suitable for MATLAB.
+* **New CIF tools.** Several new tools are included for CIF filtering, including
+  Boxify by Tor Sverre Lande.
+* **Improved documentation.** Michael Godfrey of ISL contributed several new
+  Postscript documents for documenting Log, included a detailed explanation of
+  the MOS models currently used in analog.
+* **Major DigLog bugfix.** Micah Beck of the University of Tennessee helped
+  trace down a major bug in DigLog, that was responsible for schematic
+  corruption of large files. Many users were bitten by this bug in the past.
+  Until new users report back, we won't know for sure if this change completely
+  solves schematic corruption for large designs when DigLog simulation is
+  occuring: it's hard to test for bugs that only occur only in large designs.
+
+In addition to these major improvements, lots of little bug fixes and
+enhancements have been added in the release.