https://github.com/cc65/cc65
cc65 - a freeware C compiler for 6502 based systems
https://github.com/cc65/cc65
Last synced: 10 days ago
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cc65 - a freeware C compiler for 6502 based systems
- Host: GitHub
- URL: https://github.com/cc65/cc65
- Owner: cc65
- License: zlib
- Created: 2013-03-21T15:56:48.000Z (about 12 years ago)
- Default Branch: master
- Last Pushed: 2025-03-25T15:01:44.000Z (24 days ago)
- Last Synced: 2025-04-02T01:03:43.955Z (17 days ago)
- Language: C
- Homepage: https://cc65.github.io
- Size: 28.3 MB
- Stars: 2,402
- Watchers: 92
- Forks: 453
- Open Issues: 236
-
Metadata Files:
- Readme: README.md
- Contributing: Contributing.md
- License: LICENSE
Awesome Lists containing this project
- AwesomeCompiler - cc65
README
The cc65 cross-compiler suite
=============================
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](https://cc65.github.io):
| Company / People | Machine / Environment |
|-------------------------|-------------------------------------|
| Apple | Apple II |
| | Apple IIe enhanced |
| Atari | Atari 400/800 |
| | Atari 2600 |
| | Atari 5200 |
| | Atari 7800 |
| | Atari XL |
| | Lynx |
| Tangerine | Oric Atmos |
| Eureka | Oric Telestrat |
| Acorn | BBC series |
| Commodore | C128 |
| | C16 |
| | C64 |
| | CBM 510/610 |
| | PET |
| | Plus/4 |
| | VIC-20 |
| VTech | CreatiVision |
| Commander X16 Community | Commander X16 |
| Bit Corporation | Gamate |
| Berkeley Softworks | GEOS (Apple/CBM) |
| LUnix Team | LUnix (C64) |
| Nintendo | Nintendo Entertainment System (NES) |
| Ohio Scientific | OSI C1P |
| MOS Technology, Inc. | KIM-1 |
| NEC | PC Engine (PCE) |
| Dr. Jozo Dujmović | Picocomputer (RP6502) |
| Watara | Watura/QuickShot Supervision |
| Synertek | SYM-1 |
A generic configuration to adapt cc65 to new targets is also around.
## People
cc65 is originally based on the "Small C" compiler by Ron Cain and
enhanced by James E. Hendrix.
### Project founders
* John R. Dunning: [original implementation](https://public.websites.umich.edu/~archive/atari/8bit/Languages/Cc65/)
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.
### Core team members
* [Christian Groessler](https://github.com/groessler): Atari, Atari5200, and CreatiVision library Maintainer
* [dqh](https://github.com/dqh-au): GHA help
* [Greg King](https://github.com/greg-king5): all around hackery
* [groepaz](https://github.com/mrdudz): CBM library, Project Maintainer
* [Oliver Schmidt](https://github.com/oliverschmidt): Apple II library Maintainer
### External contributors
* [acqn](https://github.com/acqn): various compiler fixes
* [jedeoric](https://github.com/jedeoric): Telestrat target
* [jmr](https://github.com/jmr): compiler fixes
* [karrika](https://github.com/karrika): Atari 7800 target
* [Stephan Mühlstrasser](https://github.com/smuehlst): osic1p target
* [Wayne Parham](https://github.com/WayneParham): Sym-1 target
* [Dave Plummer](https://github.com/davepl): KIM-1 target
* [rumbledethumps](https://github.com/rumbledethumps): Picocomputer 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](https://github.com/orgs/cc65/teams)
or the list of [all contributors](https://github.com/cc65/cc65/graphs/contributors).
# Contact
For general discussion, questions, etc subscribe to the
[mailing list](https://cc65.github.io/mailing-lists.html)
or use the [github discussions](https://github.com/cc65/cc65/discussions).
Some of us may also be around on IRC [#cc65](https://web.libera.chat/#cc65) on libera.chat.
# Documentation
* The main [Documentation](https://cc65.github.io/doc) for users and
developers.
* Info on [Contributing](Contributing.md) to the CC65 project. Please
read this before working on something you want to contribute, and
before reporting bugs.
* The [Wiki](https://github.com/cc65/wiki/wiki) contains some extra info
that does not fit into the regular documentation.
# Downloads
* [Windows 64bit Snapshot](https://sourceforge.net/projects/cc65/files/cc65-snapshot-win64.zip)
* [Windows 32bit Snapshot](https://sourceforge.net/projects/cc65/files/cc65-snapshot-win32.zip)
* [Linux Snapshot DEB and RPM](https://software.opensuse.org/download.html?project=home%3Astrik&package=cc65)
[](https://github.com/cc65/cc65/actions/workflows/snapshot-on-push-master.yml)