Atari ATR Tools is a versatile, cross-platform utility written in Ada 2022 for managing ATR disk image files used by Atari 8-bit emulators (e.g., Altirra, Atari800) and hardware add-ons like SIO2PC. Unlike most existing tools, which are Windows-only, this tool runs seamlessly on macOS, Linux, and Windows, making it ideal for retro computing enthusiasts across all major platforms.

Key features include:

Header Analysis: Display detailed metadata of ATR files, including sector size, disk density, track count, and boot sector presence.

  > atr_tools-main --print-header test-DD-DS-80.atr
  File name	   : test-DD-DS-80.atr
  Magic		   :	  16#296#
  Paragraphs	   :	    46056
  Sector size	   :	      256
  Flags		   :	     2#1#
  Bad Sectors	   :		0
  Unused	   :	    16#0#
  Sectors	   :	     2880
  Bytes		   :	   736896
  Boot Sectors	   : true
  Floppy disk double density, double sided, 80 track

Floppy Image Creation: Format and create ATR files for various disk configurations (e.g., single-sided, double-density, 80 tracks).

> atr_tools-main --verbose --format-floppy --density=DD --side=SS --track=80 test-DD-SS-80.atr
File created	 : test-DD-SS-80.atr
Sector size	 :	    256
Sector per track :	     18
Tracks per side  :	     80
Sides per disk	 :	      1

The tool includes a comprehensive test suite to ensure reliability across platforms and configurations. Source code and tests are available on SourceForge. Detailed GNATdoc documentation can be found at 6502 Tutorial.