version 1.09
A mostly Mac/65 compatible cross-assembler

ATasm is a 6502 command-line cross-assembler that is compatible with the original Mac/65 macroassembler released by OSS software. Code development can now be performed using "modern" editors and compiles with lightning speed.

ATasm is hosted at SourceForge.net.

ATasm Features:

• ATasm produces Atari native binary load object files or can optionally target the machine state files produced by the Atari800Win Plus emulator, the Atari800 emulator (version 0.9.8g or greater) and the Atari++ emulator.
• Support for saving binary to .XFD or .ATR disk images
• Conditional code generation, and code block repetition
• Bank support for creating large (>64k) cartridge images or overlay code.
• Rich macro support, compatible with existing Mac/65 code libraries
• Support for .ATR disk images, as well as double density and enhanced density Atari DOS 2.x images
• Support for Atari++ state files, as well as updating other state files to more modern formats
• Support for the .SET 6 MAC/65 directive, allowing for compiling to offset locations
• New .BANK directive for creating large cartridge images, or for code that uses the INITAD load vector (see the documentation for examples)
• Atari specific assembler directives (.SBYTE,.FLOAT,etc.)
• Support for Atari "Sally" 6502 undocumented instructions

New in 1.09

• Numerous security fixes, no more stack overflow issues when compiling hostile code.
• Numerous bug fixes.

In addition to included Windows binary, ATasm compiles cleanly under Linux, MacOS/X or any platform with the GNU C compiler.

Download the current and older releases from SourceForge. (includes Windows binary, complete source code, documentation and sample Mac/65 source files)

The latest package can be obtained locally.

You can also view the .PDF manual here and the changelog.

If you intend to compile the package yourself, and you do not have the zlib compression library installed on your machine, download it from the zlib homepage.

Questions or comments? Feel free to contact me via the SourceForge project.