JSFunge-98

JSFunge-98 is a standards-compliant Befunge-98 interpreter written in pure JavaScript. Try it here!

Files

• befunge98.html: the main frontend page for the interpreter.
• befunge98.css: the stylesheet for the interpreter.
• befunge98.js: the interpreter control code.
• befunge98-engine.js: the actual interpreter. This file contains everything needed for actually running the interpreter.

Features

Browser interface

JSFunge-98 has a browser interface that allows for:

• writing code
• loading built-in examples
• loading code files from the user's computer
• pre-entering input or using an interactive console (todo)
• running the code, with optional delay
• stepping code instruction by instruction
• debugging with stack and Funge-Space views and
• entering command line arguments.

Interpreter

JSFunge-98 implements the entire Befunge-98 specification. Filesystem Funge is not implemented for obvious reasons. Concurrent Funge-98 support may come in the future.

JSFunge-98 has been tested against the Mycology test suite, and it passes all tests.

The following fingerprints are currently implemented:

• MODU
• NULL
• ROMA

Known issues

• Input is not working yet.

Upcoming features

• Breakpoints.
• Saving files.
• Concurrent Funge-98.
• Working input.