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This PR is mostly a complete rewrite of the emulator for 6502/65c02 opcodes. It provides an easier to maintain implementation of the instructions, by using few macros rather than having hand-written code for each function. All undocumented, previously missing opcodes for 6502 are also implemented. The patch also includes a detailed documentation of those opcodes, for reference to developers. This PR should fix one of the milestones listed here for the next version of CC65: https://github.com/cc65/wiki/wiki/Before-the-next-release
About cc65
cc65 is a complete cross development package for 65(C)02 systems, including a powerful macro assembler, a C compiler, linker, archiver and several other tools. cc65 has C and runtime library support for many of the old 6502 machines. For details look at the Website.
People
Project founder:
- Ullrich von Bassewitz
Core team members:
- 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
External contributors:
- 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
(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
Contact
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
Documentation
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The main Documentation for users and developers
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Info on Contributing to the CC65 project. Please read this before working on something you want to contribute, and before reporting bugs.
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The Wiki contains some extra info that does not fit into the regular documentation.
Downloads
