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Table of Contents What is cc65? Host platforms Target platforms Setting up a cc65 project Tips and tricks Frequently asked questions Library internals Compiler internals Debug information Applications

What is cc65?

cc65 is a complete package, which includes

• a C compiler for machines with a 6502 compatible CPU,
• a powerful macro assembler,
• linker, librarian and several other tools,
• target libraries that support common 6502 platform like the Commodore C64, the Atari 8-bit machines, the Apple II and others,
• documentation and more.

Host platforms

According to the original author and former maintainer: "With one exception in the compiler (access()) the code is plain ISO C, so it should compile on most systems. Memory usage may be a problem, however."

cc65 can surely be compiled and run on the following platforms, for which GNU Compiler Collection - GCC is available.

• GNU/Linux
• Microsoft Windows
• OS X
• AmigaOS

Target platforms

• Apple II
• Atari 2600
• Commodore machines
• GEOS

Setting up a cc65 project

• Hello cc65!
• Setting up somewhat bigger projects
• Hey, my project is growing!

Tips and tricks

• Using cc65 with Emacs
• Using ca65 with foreign source
• Using runtime zeropage locations in assembly language

Frequently asked questions

• PEEK and POKE
• The .ORG directive
• Interrupt handlers in C
• Direct console I/O
• Symbols in local scopes

Library internals

• Tiny Graphics Interface
• Priority of constructors and destructors
• Reminders

Compiler internals

• The primary register
• Parameter and return stacks
• Parameter passing and calling conventions
• Roadmap
• Known bugs

Debug information

• Overview
• Available information
• Module usage and API calls

Applications

• User contributions
• Applications written in assembler with ca65
• Applications written in C or C with assembler

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