Package atasm

6502 cross-assembler

https://atari.miribilist.com/atasm/

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

Version: 1.09

General Commands

atasm assembler targeted for the 6502 CPU with Atari-specific features