JSqueak -- Java implementation of the Squeak Smalltalk Virtual Machine

This is a fork of JSqueak

JSqueak is a Java implementation of the Squeak Smalltalk virtual machine, originally developed by Daniel H. H. Ingalls at Sun Microsystems.

The (original) site of JSqueak is deprecated:
http://research.sun.com/projects/JSqueak

An archive site maintained by ESUG (European Smalltalk User Group) can be found in here:
http://www.esug.org/data/Smalltalk/Squeak/JSqueak/local.html

This repository is forked from repository of Victor Rodriguez:
https://github.com/victorr/jsqueak

I have upstreamed major changes from mine ricky9090/jsqueak to victorr/jsqueak.

Progress

With my changes/improvements to the project, now JSqueak can load and run a full version Squeak 2.2 image (but crashes easily).

Notable changes / improvements:

• Fix floating-point number issue. Now JSqueak can read floating-point numbers from image file correctly. To verify this issue, try to move/resize the "Welcome to Mini Squeak 2.2" window (in mini.image).
• Reduce input lag by using a separate thread to notify input event.
• Beta support for (Main)Window resizing (Have to do "restore display" x2 manually after resizing).
• Beta support for 8/32 color depth (Also have to "restore display" manually).
• Clipboard features (copy/cut/paste).

TODO

I'm planning to add more improvements to this project:

• Adding support for more color depth, and fix bugs related to display
• More primitive implementations
• Support for image saving
• Code refactoring and performance optimization
• and more ...

Other derivative/fork of JSqueak

Potato VM
Developed by HPI (Hasso-Plattner-Institut), with many new features & improvements
Introduction: http://www.hpi.uni-potsdam.de/hirschfeld/projects/potato/index.html
Announcement: https://news.squeak.org/2008/07/07/potato-version-of-jsqueak-from-hpi/
Document: http://potatovm.blogspot.com/
Source code: https://sourceforge.net/p/potatovm/code

victorr/jsqueak
Unofficial repository for JSqueak, maintained by Victor Rodriguez,
he also participated in Potato's development. See: AUTHORS
https://github.com/victorr/jsqueak

jan-tomsa/jsqueak
A fork maintained by Jan Tomsa, with bug fixing and refactoring.
https://github.com/jan-tomsa/jsqueak

daitangio/jsqueak
Developed by Giovanni Giorgi, merged with the work from Jan Tomsa and the potato
https://github.com/daitangio/jsqueak

Useful Materials & References

Squeak Official WebSite
https://squeak.org/

Pharo Official WebSite
https://pharo.org/

Here you can download the old versions of Squeak
http://files.squeak.org/

For Squeak 2.2 source code and its VM implementation translated into the C language
http://files.squeak.org/2.2/2.2.tar.gz

Back to the Future: The Story of Squeak, A Practical Smalltalk Written in Itself
The original paper of Squeak Smalltalk. (HTML version)
http://files.squeak.org/docs/OOPSLA.Squeak.html

Smalltalk-80: The Language and its Implementation (aka The BlueBook)
http://stephane.ducasse.free.fr/FreeBooks/BlueBook/Bluebook.pdf

ESUG (European Smalltalk User Group)
http://www.esug.org/

Smalltalk-Archive collected by ESUG, include:

• Slides and Videos from past ESUG conferences
• Papers and Articles sponsored
• interesting historical artefacts and papers

http://esug.org/data/

codefrau/SqueakJS
An HTML5 runtime engine for Squeak Smalltalk written in pure JavaScript by Vanessa Freudenberg.
https://github.com/codefrau/SqueakJS

devhawala/ST80
A Smalltalk-80 virtual machine by Dr. Hans-Walter Latz. Based on the "Bluebook" specification, implemented in Java 8.
https://github.com/devhawala/ST80

dbanay/Smalltalk
A C++ implementation of the Smalltalk-80 system by Dan Banay
https://github.com/dbanay/Smalltalk

License

JSqueak was released under the MIT license
(see https://news.squeak.org/2008/06/21/jsqueak-smalltalk-interpreter-written-in-java).