XCircuit History of Code Modifications

Current Status

Stable version 2.5.5 has been extensively tested on a real chip design of nearly 40,000 devices, and successfully generated the netlists for simulation and LVS (layout-vs.-schematic).

Development (Beta) version 3.0.x has a number of features and enhancements (see code revision history below), but most of the changes are internal and transparent to the end-user. Stability is not guaranteed due to the large number of structural changes, but version 3.0 has successfully compiled large schematic netlists, validated through LVS.

Version 3.0 contains code for a Tcl interpreter-based version of xcircuit. This is incomplete and should be considered pre-release. As long as the normal configuration procedure is followed, version 3.0 should compile and run like the latest stable version version 2.5. In other words, version 3.0 can be considered stable as long as you don't do "./configure --enable-tcl".

Other future features of xcircuit, and a complete revision history, are outlined in the Manifest file in the source code directory.

Code Revision History

• (version 3.0) Has not been updated on this page. See the Manifest file in the source distribution top-level directory.
• 1/3/02
  (version 2.5.3) Minor bugfixes: variable reading (varfscan, varpscan) requires skip over whitespace. Netlist requires reinstating routine nearpoint() because matrix transformations have roundoff errors and pin positions should not be compared exactly. Updated Copyrights to 2002. Netlist generation has been confirmed on a large schematic design.
• 1/1/02
  (version 2.5.3) First cut at incremental netlisting---implemented a scheme in which netlists are kept after being generated, until they are invalidated or the object is destroyed. This scheme allows the netlist structure to be queried at any time. Netlist creation is independent of the netlist mode, as it should have been to begin with.
• 12/26/01
  (version 2.5.2) Correction to duplicate object code makes sure that schematic/symbol association does not get destroyed along with the duplicate object!
  Also: Applied Holger Vogt's patches to configure.in for proper compilation under Cygwin.
• 12/15/01
  (version 2.5.2) XCircuit now allows pin labels to be parameterized, treating them as an instance-dependent label. While this does not alter the SPICE and sim netlists, it allows (for example) quad parts such as four NAND gates of a 7400 chip, each having its own unique pinout but sharing the same object.
  Also: To go with the pin labels, added a method for generating "virtual copies" of an object to appear on a library page ("V" key from the library page). The virtual copy is a different instance of the object, and can take different parameters. Started on library "quadparts" with 7400-series pinouts to facilitate use of the new feature with PCB netlisting.
• 12/06/01
  (version 2.5.1) Revised the routines that deal with duplicate objects. New routines prevent propagation of appended underscores (used to differentiate between objects with the same name but different structure). The major change is that a list of aliases is kept for objects with the same structure but different names, so there is no confusion through the process of reading the library. When the loading is done, the aliases are removed and the names are cleaned up.
  Also: Switched the copyright to GPL for better compatibility with other open-source tools, and because it's the Right Thing To Do.
• 11/28/01
  (version 2.5.0) Removed an ill-conceived routine which would delete duplicate copies of an object even if the names were different. This action can give rise to very bad inconsistencies. A better idea would be to try to "clean up" leading underscores whenever an object with a leading underscore is deleted. However, this is a minor point.
  Also: Fixed a string overrun bug in charreport().
• 11/16/01
  (version 2.5.0) Finally (!) added support for parameterized values other than label (sub)strings. This includes parameterization of all element values except color (which is handled by an inheritance model). Includes parameterization of: point position (x, y, or both), line style, linewidth, scale, rotation, label justification, and arc radius, minor axis, and endpoint angles. Includes support loading, saving, displaying, printing, and editing.
• 11/14/01
  (version 2.4.0) Added python script "pagebbox.py" to create standard page-size bounding boxes (request from Bob Paddock). Along with this, I updated the python code to handle colors by name or RGB components, rather than by index, which is visual-dependent.
• 11/12/01
  (version 2.4.0) Bug fixes to 2.4.0: Fallback resources string must be null-terminated, added 2 remaining fallback resources that are not taken care of by the XtGetApplicationResources() routine, and changed XtAddConverter to XtAppAddConverter. I hope that the application-specific references will prevent problems with the timeout functions, and maybe with input focus as well.
  Also: Fixed type casting of values retrieved from the message3 widget---values are type "Dimension" and "Position" (usually defined as unsigned short and short, respectively), not int. Causes errors under Solaris and probably other systems, too.
• 11/09/01
  (version 2.4.0) Switched to a new method for defining rotation. Rotation in xcircuit is now given in degrees, which matches the PostScript output. Flipping is done in the obvious way by declaring a negative scale value (which is applied only to the X component in the transformation matrix; Y is always positive). Lookup tables for sines and cosines are replaced by the math library functions, which presumably are fast enough not to show any performance hit on most machines. The redefinition of the PostScript prologue prompts the move to a new minor version number. Rotation is still an integer value, so the minimum rotation increment is 1 degree.
  Also: Fixed an error in the PostScript prolog in which text flip invariance was incorrectly implemented after the addition of text kerning & scaling methods. Fixed another error in which XCircuit and PostScript disagree about text orientation due to roundoff errors. Matrix values must be compared to some epsilon, not zero, to determine when the orientation is 90 or 270 degrees. epsilon = 1e-9 works fine.
  Also: Changed certain Xt routines to include XtAppContext in the hope of avoiding the problem with the TimeOut function conflicting with other X11 programs (namely, screensavers). Hopefully the addition of fallback_resources to XtOpenApplication will prevent problems with the X defaults when the X defaults file cannot be found.
  
• 11/05/01
  (version 2.3.6) Added rudimentary "edit-in-place". Currently, this is a bit odd, because the hierarchy above the object is rotated to match the "natural" orientation of the object, rather than the other way around. This should be fixed by allowing rotation and flips to the top-level page (keep the transformation matrix for the page rather than just the scale and position). Skewing of the grid due to rotations is a can of worms, though. Probably rotating to the nearest 90 degrees would suffice for most purposes. Edit-in-Place is turned on by default. It can be turned off if the extra drawing clutters the window.
• 11/01/01
  (version 2.3.6) Fixed a long-standing error in which the "rejustify" routine was giving labels invalid "justify" bit fields. Fixed a problem with the "visible pins" in which the visibility flag would always be reset by a rejustification of the label.
  Also: Removed the ":n" suffix from pages in multiple-page files with the same name. The addition of the suffix was screwing up the association of symbols to schematics on file reads, and it seems to work fine without it. Some attempt is made to enforce unique names for pages associated to symbols, but it seems to work correctly whether or not names are unique.
  Also: Fixed an error in string parameter deletion, and added a call to mergestring() after deletestring() to connect any divided text.
• 10/25/01
  (version 2.3.6) Revamped the file list window on the suggestion of Zhengdao to highlight files that match the expected file extension. Extended this idea to include a "file filter" which displays only those files with matching extensions. This feature can be turned off by clicking a toggle button in case a file with an unusual name or extension cannot be seen.
  Also: Added a flag to the label justification value which allows pins to be seen on hierarchical levels other than the top. Changes to the prolog prompted the change to subversion 6 although the change is fully backward-compatible. Thanks to Bob Paddock for the suggestion.
• 10/24/01
  (version 2.3.5) Fixed a netlisting bug pointed out by Bryce Denny in which the layer ordering of label vs. polygon can cause the label to not be associated with the network under it. This led me to discover another bug in which a label position would update the netlist properly but the actual label itself would not be added to the netlist (the only apparent consequence is that the label is not hightlighted during a connectivity check).
  Also: Fixed the behavior of the .xcircuitrc file loading so that keys can be rebound from the file. Added Python commands for pan and zoom, and wrote an example script which rebinds keys "Z" and "z" to a python function which combines the pan and zoom. Separated zoom functions between those with and without screen refresh.
• 10/22/01
  (version 2.3.4) Fixed some buggy behavior with respect to loading and setting default fonts in .xcircuitrc and xcstartup.py. Thanks to Jeremy Braun (jtbraun@MIT.EDU) for reporting these errors in detail.
  Also: Fixed a missing requirement in checking object name syntax. A PostScript name must be a string which cannot be interpreted as a number. Thus, "+9" and "1E9" are illegal names. Thanks to Bob Paddock (bpaddock@csonline.net) for reporting this bug.
  Also: Changed behavior with respect to environtment variables, allowing "TMPDIR" to set the temporary directory and allowing an override of the "XAPPLRESDIR" directory. Added a list of environment variables used by xcircuit to the manual page.
  Also: Revised the tempfile mechanism once again to include a check on the number of times a file has been modified; heavy modification will induce a temp-file save even if the timer has not expired.
• 10/19/01
  (version 2.3.4) Implemented a "changed" file mechanism which checks for changes to pages and objects and queries for confirmation if there are unsaved changes upon quitting. Changed filename behavior so that all filenames have their own malloc'd space, instead of sharing filenames. Extended file backup to include different filenames on different pages. Added a toggle box on the output popup window so that a page can be unlinked from a multipage file, and displays the number of pages in the file. Added the simple popup window (no text entry) to the list of python calls.
• 10/18/01
  (version 2.3.4) Fixed the crash file recovery so that ONLY the given crash file can be loaded (load and cancel are the only choices). Also, the actual temp file name is hidden from view, and the original filename is recovered from the "%%Title:" header line.
  Also: Fixed the problem in which startwire() was called after a popup window button was selected.
• 9/18/01
  (version 2.3.4) Names of pages added to the library and page directories. Thanks to Bob Paddock (bpaddock@csonline.net) for suggesting the feature.
  Also: Updated "configure.in" to check for the infamous python version 1.5, and disable the python interface if found.
• 9/10/01
  (version 2.3.4) RPM package makefile fixes (thanks to Alex Habig (habig@neutrino.d.umn.edu)).
  Also: changed undelete() to xc_undelete() to avoid conflict with OpenBSD/FreeBSD system calls. Thanks to Mike Andrews (mikea@mikea.ath.cx) for bringing this to my attention.
• 8/12/01
  (version 2.3.4) Implemented a Python interface into the netlist structures. Set up for use of Python scripts to generate all netlist output, as well as dealing with non-PostScript format input.
  Also: fixed a problem with crash recovery caused by the program exiting on call to Py_Exit. Improved the crash recovery mechanism to automatically find crash files on startup, and prompt user to load.
  Also: added more Python functions, for page clear, page change, add key bindings to Python functions, and create menu buttons with callbacks to Python functions. Added Python functions for calling a popup prompt, file browser.
• 7/27/01
  (version 2.3.3) Fixed more man page problems with the make process. Added default values for Python libraries when the Python Makefile can't be found. Made the rcfile parsing more robust, esp. so it doesn't crash if it attempts to read a non-script file.
• 7/26/01
  (version 2.3.3) Added auto-numbering of component numbers using netlist mode "idxpcb". This works for all component numbering (including SPICE and sim) where the component number is parameterized and denoted by a question mark ("?"). Thanks to Lapo Pieri (lapo@iroe.fi.cnr.it) for the suggestion and some code to implement the function outside of xcircuit.
  Also: Fixed Imakefile so that imake uses m4 to generate the man page correctly on "make install.man".
• 7/18/01
  (version 2.3.3) Fixed two errors, one which split global nets in hierarchical PCB netlists, the other which failed to find nested parameters.
• 7/17/01
  (version 2.3.3) Some changes to the GNU autoconf (with much help from Albert Chin) for correct parsing of the path to python, avoidance of errors when generating the man page, and re-instantiation of the keyboard input focus workaround.
  Also: Removed the behavior of turning pins back into labels when creating objects or moving labels between pages or objects. Added behavior that if a pin is removed (or moved out of an object), and the pin has a unique string, any pin on the corresponding symbol/schematic will revert to a plain label. This was the intended behavior.
• 7/09/01
  (version 2.3.3) Added label strings to the Python setattr() command. Added a getcursor() command to Python. Created a python script called "gettext(filename)" which creates an xcircuit label from the contents of an ASCII file.
• 7/06/01
  (version 2.3.3) Quick fix to an error in interpreting key names for key bindings.
• 7/05/01
  (version 2.3.3) Added environment variable XAPPLRESDIR so that application defaults come from the location specified by the configure script, not /usr/lib/X11/app-defaults. This also allows app-defaults to be used even if xcircuit is compiled without root privileges. The configure script was modified to compile in Xpm, if it can be found.
• 7/02/01
  (version 2.3.3) Changed netlist behavior so that wires only connect at endpoints (although an endpoint may attach TO any location along a segment of another wire). Optimized a few routines for speed. Netlist output now changes symbol font and standard font "mu" (i.e., micro) to "u". Fixed a bug preventing correct loading of files containing multi-part strings as parameters.
• 6/28/01
  (version 2.3.3) Cleaned up some behavior with respect to component numbering, including fixing numbering for flattened SPICE output. Added a PCB library for generic IC parts.
• 6/27/01
  (version 2.3.3) Corrected the parseinfo() routine so that it correctly uses the symbol, not the schematic, to pick up information about a pcb name. Changed some of the library objects (namely the passive devices like Resistor and Capacitor) so that pin names are PCB-like and device can be given a part number. Changed the netlist compiler behavior so that all indices are numbered relative to a particular component, rather than numbered relative to all components.
• 6/25/01
  (version 2.3.2) I have introduced GNU autoconf/automake in this version, thanks to help from Albert Chin. Also includes numerous fixes of bugs stemming from changes made between versions 2.1 and 2.3.
• 5/30/01
  (version 2.3.1) This version completes the hierarchical schematic capture, and includes many internal structural changes which should be transparent to the end-user. A few visible changes include better listing of the contents of an edited string in the message window, and the addition of tab stops, scale and color changes, and embedded carriage-return in labels. Errors stemming from parameterized objects have been fixed by the structural changes.
• 12/19/00
  (version 2.2.0) Added to the functions available at the command line (thanks to Norman Werner (norman.werner@student. uni-magdeburg.de for patches); also, changed the startup behavior from loading "builtins.lps" (nominally a library file) to loading "startup.script" (a command script). Commands "loadlibrary" and "loadfontencoding" in .lps files are no longer warrented, although they are supported for backward compatibility.
• 12/18/00
  (version 2.2.0) Finally, a stable release including schematic capture code. Just in time for Christmas. Includes changes to the way schematics and symbols are associated with one another, fixes to the netlist generation; also, xcircuit now loads "analoglib2.lps" (circuit symbols with parameters andmore netlist informatio) as a default library page.
• 12/04/00
  (version 2.1b9) Fixes to the code changes from 11/29.
• 11/29/00
  (version 2.1b9) Addition of text blocks (Alt-Enter inserts a carriage return during text edit), and scale change, color change, and kerning (character offsets) within labels.
• 11/11/00
  (version 2.1b8) More fixes related to bugs in the parameterization and netlist routines (yes, deja vu). Thanks to Terry Hancock (hancock@earthlink.net) for exercising the functions and finding bugs. Also, there's a new xcircps2.pro which redefines "label" from the PostScript end, adding block text and kerning capabilities (which have not yet been added to the xcircuit code), and fixing long-standing inconsistencies between xcircuit and PostScript on label alignment.
• 10/27/00
  (version 2.1b7) More fixes related to bugs in the parameterization and netlist routines. Also, added more "%" special sequences to info labels: %n for object name, %r for carriage-return, %t for tab, and %% for the percent sign character. Info labels for "pcb:" format are now interpreted as object names (to be inserted into the netlist).
• 10/23/00
  (version 2.1b6) Quick fix of a fatal bug pointed out by Wilson Barroz (wbarroz@bol.com.br) wherein a "path" element cannot be selected without causing a crash (the bug was accidentally introduced somewhere in the 2.1b series).
• 10/2/00
  (version 2.1b6) Fixed many of the problems associated with parameter strings. Have not yet exhaustively tested for remaining bugs. Change in label output to allow escape sequences to be part of parameters.
• 9/25/00
  (version 2.1b5) Added a menu option to read a script, using the same command-line feature as was implemented below for the .xinitrc file. Also, added some functions to the command-line parser and fixed an error with bounding-box calculations for EPS output.
• 8/4/00
  (version 2.1b2) Added a command-line window which accepts the same commands as the .xcircuitrc file. This syntax will be expanded in the near future. Added text hints to the toolbar buttons. Added a user-definable bounding-box capability, and fixed the automatic bounding-box calculation to include spacing between pins and their text. Added a "auto-fit" feature to automatically scale the drawing to fit the output page. Also improved the behavior of the text-edit widget to delete a selection if it exists in lieu of deleting a character.
• 8/1/00
  (version 2.1b1) Added the crucial feature of automatic file saving to a temporary file: in case of hangs or crashes, the file can be recovered from the /tmp directory. The name generation routine is the system call tempnam() with prefix "XC". Temporary saves are redundantly protected during file writes. Timeouts for auto-saves defaults to 15 minutes and can be set from Xdefaults as string "xcircuit.timeout", units in minutes.
• 7/31/00
  (version 2.1b1) There are some bug fixes, particularly as relates to compilation on HP/UX and a couple of obscure segmentation faults. Mostly, however, I have changed from 2.0 to 2.1 after Graham Murphy pointed out to me that older versions of 2.0 (e.g., 2.0a11) will crash when loading newer version files (e.g., 2.0b4). This is due exclusively to a tiny change made in the syntax for labels.
• 6/28/00
  (version 2.0b4) Corrected and enhanced the routine printing out the cursor position and other information to the top of the window.
• 2/25/00
  (version 2.0b4) Added two major features: 1) Ability to read in any arbitrary PostScript file, to be rendered to the background by ghostscript (assuming its on the system). 2) A toolbar down the right side for quick command execution, and quick access to object property menus. The toolbar implementation is not yet complete.
• 2/8/00
  (version 2.0b3) Bugfix: Using "add new library" followed by "make object" caused a segmentation fault because createlibrary() was malloc'ing the new library on top of the old user library.
  Also: Tested some preliminary support for ghostscript-rendered backgrounds.
• 1/13/00
  (version 2.0b3) Enhancements: Added a "library directory" as part of infrastructure for implementing multiple library pages. Changed behavior of bounding box calculations so that bounding boxes are calculated on the fly as objects are created and edited, and any changes are reflected in the page directory, the libraries, and the library directory as required.
• 1/10/00
  (version 2.0b2) There have been a number of bug fixes to the schematic capture code, and a "page order" page has been added to aid in displaying, moving to, and rearranging the internal pages. All objects and libraries now retain their position and scale in the window, and variables related exclusively to the graphics window have been separated from those which aren't, with the expectation of one day allowing xcircuit to fork off multiple windows on the display.
• 11/22/99
  (version 2.0b1) Introducing the beta version!
• 11/19/99
  (version 2.0a11) Matheiu Clar discovered that the environment variable LANG can override the ``locale'' function and make the program crash just like it used to do if locale was set to some non-US value. This has been corrected by internally setting LANG to "POSIX" (the default). If it seems unreasonable that xcircuit speaks only "English", remember that all the files it loads and saves (which are the cause of the crashing) are PostScript, and PostScript is effectively English, at least has no option to use, for instance, commas as decimal delimiters (perhaps you should get on Adobe's case about this blatant Americentrism). However, the real problem seems to be that the scanf() family of functions will just segmentation fault if they see an unexpected use of a delimiter.
• 10/29/99
  (version 2.0a11) I tracked down a fundamental problem with keyboard focus which was mainly a problem under the WindowMaker window manager. Turns out that WindowMaker likes to keep grabbing keyboard focus for itself, and won't release it back to the application. The solution was to keep a constant vigil on ClientMessage (nonmaskable) events into the xcircuit top level window. Nevertheless, bug reports still keep coming. There will be more fixes.
  Thanks to:
  Tennessee Carmel-Veilleux , Raymond Burns , Paul Ortyl , Pete Boettcher , Damien Montassier , Don Johnson , Shaul Karl .
• 8/20/99
  (version 2.0a10) Several bug fixes: One bug fix to the output file generator to correctly identify all fonts used in the drawing; another bug fix restores the original behavior of changing font properties of selected labels (this is a fatal bug on some systems).
• 6/25/99
  (version 2.0a10) Tweaks to several functions: 3rd mouse button now backs up one line segment when drawing polygons rather than giving up on the whole thing. Cursor warps to center of screen on a pan command. New key macro "." (period) draws a dot object at the cursor position.
• 6/16/99
  (version 2.0a10) Fixed a bug which occurs under some non-US versions of Linux which use a comma as the default decimal point character, causing an immediate crash on startup for all versions from 2.0a9 to current.
• 6/14/99
  (version 2.0a10) Added ISO-Latin5 encodings (Turkish) to the font files.
• 5/24/99
  (version 2.0a10) More revamping of text handling and other bug fixes. Backslash escape sequences for entering non-keyboard text characters have been replaced by a graphical point-and-click method.
  Also: finally implemented edit mode for paths.
• 5/12/99
  (version 2.0a9) Revamped all text drawing routines to make font handling much more flexible. Added ISO-Latin1 (Western European) and ISO-Latin2 (Eastern European) encodings.
• 1/26/99
  (version 2.0a7) Fixed a bug which was introduced into version 2.0a7 which prevents landscape-oriented files from being loaded back into xcircuit. See the troubleshooting guide for more details.
• 12/18/98
  (version 2.0a7) Changed some internally fixed fonts to be able to be set by Xdefaults, and fixed some minor alignment problems in the file list widget which were associated with the choice of font.
• 12/8/98
  (version 2.0a7) Fixed a long-standing problem with page scale and grid/snap spacing: all of the above are made separate for each page and are saved and loaded with each file. Also, some attempt at smooth scrolling was added, and a zoom-out box function was added to complement the zoom-in box.
• 10/4/98
  (version 2.0a6) Problems with the simple help window have been fixed, and a lot of associated source code was shuffled around and cleaned up.
• 9/29/98
  (version 2.0a5) The color icon code apparently introduced a bug in which most window managers would lose input focus to the program. This is partially fixed, but input focus behavior still depends on the window manager. This is mainly a concern for Linux, where the availability and variety of window managers has exploded in recent days. If you have problems with a specific window manager, please send me a bug report including the system and window manager you are using.
• 9/1/98
  (version 2.0a4) More bug fixes; color icon added.
• 8/23/98
  Useful new features added (version 2.0a3) such as flip-invariant text. Coming soon: parameterized objects (a must for schematic capture and any hope of compatibility with other CAD tools). Bug fixes galore, and the graphics look fabulous as always, but don't expect xcircuit to generate a correct spice deck, yet (it's getting there). Flip-invariant text keeps all text within 90 degrees of upright regardless of how many flips and rotations its put through---so, for instance, the ``Vdd'' always reads forward, even when it's in a subcell that has been flipped around backwards.
• 7/9/98
  Alpha version of schematic capture system xcircuit-2.0 introduced.
• 5/21/98
  A few bugfixes and additions courtesy of Jörg Wunsch, including the addition of handling WM_DELETE_WINDOW client messages to allow the program to be closed by window manager controls.
• 5/19/98
  Bug fixes from Paul Slootman for the 64-bit Alpha platform.
• 5/13/98
  David DiGiacomo pointed out that the problem with the "make" halting under Solaris is the indeterminate exit status returned by the menudep program. This has been fixed.
• 4/11/98
  Backspace can no longer be typed from the keyboard; instead, the keyboard Backspace acts like Delete, and a Backspace character can be inserted from the menu.
• 3/16/98
  Fix to a PostScript profile bug which caused stipple patterns to be drawn incorrectly in rotated objects. If you have an xcircuit version prior to 3/16/98, please update your PostScript profile with the corrected xcircps2.pro file.
• 2/25/98
  Fixes to Xw to make it compile cleanly: result is that Xcircuit now compiles under DEC Alpha, and Xcircuit will compile under (at least) Linux and IRIX without making system-dependent changes to the Imakefile.
• 2/12/98
  Changes to the inch/cm conversions; xcircuit is now friendlier toward Europeans: it can be made to start in metric mode (with the .xcircuitrc file) and reports all measurements in centimeters when in metric mode as well as setting the size of a "full page" to A4 standard.
• 1/30/98
  Work on the schematic capture system is less in earnest than claimed, as my Ph.D. thesis takes top priority. However, the last known fatal bugs have been excised from xcircuit, which is now in version 1.7. A copyright has been added and xcircuit is now occasionally posted to metalab.unc.edu (formerly sunsite).
• 10/15/97
  Work in earnest has begun on the xcircuit schematic capture system.
• 10/8/97
  (1) Added a feature to "hide" objects which are only subcomponents of other objects and not meant to be independent objects to be grabbed from the library. (2) Fixed the polygon editing modes to a more reasonable form. (3) Changed object editing so that edited objects to not change position in the list of elements.
• 10/1/97
  Changed color values to type int; this allows xcircuit to run on 16/24-bit TrueColor display visual types as well as the usual 8-bit PseudoColor visual (you wouldn't believe how many programs crash when run on a 16-bit visual!). If your version of xcircuit is working fine, then you don't need the update.
• 9/10/97
  Fixed a bug which causes problems in the PostScript output if more than 12 new fonts are added to the font list. This is a rare occurrence and should not affect most users.
• 9/9/97
  Changed some Xw code for compilation under DEC OSF (DEC Alpha). Does not affect current users. Still can't compile correctly under DEC Alpha anyway!