Ullrich von Bassewitz has announced that version 2.13.0 of the popular cc65 cross-development package has been released. cc65 features a macro assembler, linker, C compiler and library manager for 65(C)02 based systems.

Ullrich’s announcement is attached:

I’m proud to announce version 2.13.0 of cc65. cc65 is a complete cross development package for 65(C)02 systems, including a powerful macro assembler, a C compiler, linker, librarian and several other tools.

cc65 has C and runtime library support for many of the old 6502 machines, including

– The following Commodore machines:

C16/C116 and Plus/4
CBM 510 (aka P500)
the 600/700 family
newer PET machines (not 2001).

The Apple ][ and successors.

– The Atari 8 bit machines.

– GEOS for the C64 and C128.

– The Nintendo Entertainment System (NES).

– The Supervision console.

– The Oric Atmos.

– The Lynx Console.

The libraries are fairly portable, so creating a version for other 6502s
shouldn’t be too much work.

This version has many improvement over version 2.12. To name a few:

– Support for bit-fields.

– Improved standards compliance. Several missing functions and headers have been added.

– Improved compatibility with ancient K&R sources.

– Additional warnings in case of dubious code.

– The startup code went into the library. This simplifies linker usage. If you have a custom startup file, please check it – there have been conceptual changes.

– Several improvements in the libraries. Functions were changed for more speed or smaller size.

– “Secondary” linker configurations make it easier to support more than one setup per target system.

– Improved code generation. The code generated by the compiler is faster than before, usually without much increase in code size.

Precompiled binaries are available for the most common platforms. On many other host platforms, the sources compile out of the box, so you’ll able to create your own binaries.

For RedHat Enterprise Linux 5, ready made RPM packages are available. These packages may also work on other rpm-based Linux systems. Please note that there are separate RPMs for the compiler proper, the docs, and the target specific libraries. To develop code for one of the target machines, you need the compiler RPM package *and* one of the target machine packages. Be sure to download the documentation package if you’re new to cc65.

For windows users, there’s a user friendly installer package (the one with the .exe extension). All subpackages are selectable from within the installer dialogue. The installer will also setup the necessary environment variables and start menu entries. It is recommended that Windows users choose this package instead of the .ZIP files.

Precompiled binaries for DOS, OS/2 and Windows are available in ZIP archives. As with the RPM packages, you need the package for the development host system (Windows or whatever) *and* one or more of the target machine packages, plus optionally the doc package.

All packages are available from the MU software FTP server:


More information on cc65 can be found on the cc65 web page at:


There is also a mailing list for discussing cc65 related issues (programming, suggestions, bugs, …). See http://www.cc65.org/#List for information on how to subscribe to this list.

While I’m the main developer of cc65, it is actually a joint effort. I would like to thank the target library developers, all the people on the cc65 mailing list, all those sending suggestions and feedback, and even those bugging me for a new stable release:-) The CREDITS file is probably incomplete, but you know who you are.

Thank you!