Atmas 2 Compatible 6502 Cross-Assembler
Xatmas2 is a cross-assembler for modern systems to cross-assemble original source code for the Atmas II assembler for the Atari 8-bit series, once a popular assembler in the eighties and nineties.
git clone https://github.com/ivop/xatmas2
cd xatmas2
make
Tested on Linux. Should work on Windows (MSYS2, Cygwin, WSL) and macOS, too, but is not tested yet.
Originally called Codegen.
Copyright © 2004-2011, Richard Jackman
Major overhaul, cleanup, and rename.
Copyright © 2018, Ivo van Poorten
Parser and macro fixes.
Copyright © 2023, Daniel Serpell