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JBit is small java application for mobile phones (MIDlet) that gives you a programmable 8-bit microcomputer. With JBit, you can edit, save, run and debug assembly (6502) programs directly on your phone.

debugging / maze

WAP Site
Limited, low-bandwidth web site in WML.
Browse a gallery of some programs made with JBit.
Install JBit on your phone or download its source code.
Learn how to program and customize JBit.
For modern browsers (IE8+).
Additional modules and tools.


Follow @jbit6502 on twitter for the latest news about JBit.

13 Jan 2014 - jbit 2.0.0 is available. Merged the J2ME, native and javascript repositories.

4 Oct 2013 - jbit 1.2 native/webapp is available. C++/JavaScript version of JBit for PCs and modern browsers (IE8+).

29 Aug 2013 - JBDoc-20130829 is available. Added: IO Programming (1) - Requests, Images and Sprites.

19 Aug 2012 - JBDoc-20120819 is available. Smaller font added. gameapi (slightly) extended. epub and mobi formats added.

2 Apr 2012 - JBDoc-1.0.0 is available. First MIDP version.

19 Jun 2011 - JBit-20110619 is available. Just a quickfix: solved a problem with confirmation dialogs on Samsung phones.

5 Jun 2011 - JBit-20110605 is available. The monitor now supports breakpoint and step out, and the IO chip now provides tone generation and vibra.

29 Jun 2010 - JBit-20100629 is available. It includes basic support for touch-screen phones.

25 May 2010 - JBit-20100525 is available. The Paint module now supports editing multi-color images.