macOS
Homebrewverified · 100%
brew install atasmlocal Homebrew formula metadata
brew / rank 10420
Install atasm with Homebrew, dnf, Nix
Atari MAC/65 compatible assembler for Unix. Version 1.30 via Homebrew; verified from local package data. Also installable with nix: nix profile install nixpkgs#atasm.
install
Additional install commands
Linux
Fedora dnfverified · 92%
sudo dnf install atasmFedora Rawhide package metadata · atasm · source: dl.fedoraproject.org
Nixverified · 92%
nix profile install nixpkgs#atasmnixpkgs package indexes · pkgs/by-name/at/atasm/package.nix · source: api.github.com
overview
Package summary
Atari MAC/65 compatible assembler for Unix
Project links
Commands and aliases
- atasm
history
Project history and usage
ATasm is a mostly MAC/65-compatible 6502 cross-assembler for Atari 8-bit development. It lets programmers write Atari assembly on modern hosts while producing Atari-native load objects, disk images, and emulator-related outputs.
Project history
The README traces ATasm to Mark Schmelzenbach in 1998 and explains that it was created from a desire for a fast Atari-specific cross-assembler after using OSS MAC/65 on real hardware and finding other cross-assemblers lacked Atari-specific directives and conveniences. The current fork documents modifications by Peter Hinz from 2021 through 2025.
The version history records an initial public 0.90 release, GPL release at 1.00, Atari-specific output work such as XFD/ATR and emulator state-file support, undocumented opcodes, MAC/65 compatibility improvements, list/debug output, CC65 header generation, VS Code/Altirra bridge symbol dumps, long branches, trigonometry table helpers, procedure scopes, and .GUARD/.NOTIFY directives.
Adoption history
ATasm occupies a niche but durable package-manager slot: retrocomputing developers need a small native assembler that can be scripted from makefiles and editors instead of running original Atari tools inside an emulator. The supplied metadata shows Homebrew, Fedora/DNF, and Nix packaging.
Its adoption is tightly connected to Atari emulator and cross-development workflows. The README explicitly names Atari800Win, Atari800, and Atari++ state-file targets, and later releases added outputs used by CC65 and VS Code/Altirra tooling.
How it is used
The command is `atasm [options] <file.m65>`. Users enable undocumented opcodes, raw binary output, include paths, predefined symbols, XFD/ATR output, emulator state-file merging, symbol/list output, CC65 headers, ATasm include files, and JSON symbol dumps for editor integrations.
Why package nerds care
ATasm is a compact example of why niche retro tools survive in general-purpose package managers: it is small, C-based, scriptable, compatible with old source idioms, and bridges modern build systems with emulator/debugger ecosystems.
Timeline
- 1998: Original ATasm copyright and project origin.
- v0.90: Initial public release.
- v1.00: Package explicitly released under the GPL.
- 2019: v1.09 fixed multiple buffer-overflow CVEs.
- 2025: v1.30 added .GUARD and .NOTIFY directives.
Related projects
- Related projects include OSS MAC/65, Atari800, Atari800Win, Atari++, Altirra, CC65, MADS-format source conventions, and VS Code Atari cross-development plugins.
Sources
- Official git metadata from https://github.com/CycoPH/atasm.git
- https://github.com/CycoPH/atasm#readme
- https://github.com/CycoPH/atasm/releases.atom
security posture
Risk level: green
narrow executable package without higher-risk signals.
Risk classifier
green risk · low confidence · appliance
Why
- narrow executable package without higher-risk signals
Signals
- metadata:no-higher-risk-signals
Install behavior
- No Homebrew bottle metadata was recorded.
Recommended review
Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.
executables
Installed executables
| Command | Kind | Exposure | Note |
|---|---|---|---|
atasm | executable | indexed executable | Discovered from the local executable index. |
freshness
Version and freshness
These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.
page generated2026-08-03
manager version1.30
manager updated
local dataunknown
upstreamnot available
latest detectednot detected
- okNo freshness warnings were generated.
install metadata
Package metadata
| Package key | brew:atasm |
|---|---|
| Version | 1.30 |
| Package manager | Homebrew |
| Homepage | https://sourceforge.net/projects/atasm/ |
| Repository | https://github.com/CycoPH/atasm |
| Bottle | not recorded |
| Service | none declared |
source database matches
Other package-manager records
Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.
Nix95%
atasm
nix profile install nixpkgs#atasm- normalized package name match
- Matched by: Atasm
dnf95%
atasm 1.30-5.fc45
6502 cross-assembler
https://github.com/CycoPH/atasm
sudo dnf install atasm- License: GPL-2.0-or-later
- Category: Unspecified
- Architecture: x86_64
- Source Package: atasm
- 4 dependencies
- 1 provides
- normalized package name match
- Matched by: Atasm
source trail
Generated from repository data
This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.
Combined YAML source
View the package source record on GitHub.
Used sources
- Geiger risk classifier
- cross-ecosystem install command graph
- curated package history
- external package-manager database matches
- pkg.so package database
- pkgdb category and tag curation