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


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

For reporting bugs use the github issues.

Some of us may also be around on IRC #cc65 on