cc65 is a complete cross-development package for 65(C)02 systems, including a powerful macro assembler, a C compiler, linker, archiver, simulator and several other tools. cc65 has C and runtime library support for many of the old 6502 machines. For details look at the cc65 web site:

A generic configuration to adapt cc65 to new targets is also around.

cc65 is originally based on the "Small C" compiler by Ron Cain and enhanced by James E. Hendrix.

• John R. Dunning: original implementation of the C compiler and runtime library, Atari hosted.
• Ullrich von Bassewitz:
  • moved Dunning's code to modern systems,
  • rewrote most parts of the compiler,
  • rewrote all of the runtime library.

• Christian Groessler: Atari, Atari5200, and CreatiVision library Maintainer
• dqh: GHA help
• Greg King: all around hackery
• groepaz: CBM library, Project Maintainer
• Oliver Schmidt: Apple II library Maintainer

• acqn: various compiler fixes
• jedeoric: Telestrat target
• jmr: compiler fixes
• karrika: Atari 7800 target
• Stephan Mühlstrasser: osic1p target
• Wayne Parham: Sym-1 target
• Dave Plummer: KIM-1 target
• Rumbledethumps: RP6502 target

(The above list is incomplete, if you feel left out - please speak up or add yourself in a PR)

For a complete list look at the full team list or the list of all contributors.

For general discussion, questions, etc subscribe to the mailing list or use the github discussions.

Some of us may also be around on IRC #cc65 on libera.chat.

• The main Documentation for users and developers.
• Info on Contributing to the CC65 project. Please read this before working on something you want to contribute, and before reporting bugs.
• The Wiki contains some extra info that does not fit into the regular documentation.

• Windows 64bit Snapshot
• Windows 32bit Snapshot
• Linux Snapshot DEB and RPM