install

Additional install commands

macOS

Homebrewverified · 100%

brew install tass64

local Homebrew formula metadata

MacPortsverified · 94%

sudo port install 64tass

MacPorts ports tree · devel/64tass/Portfile · source: api.github.com

Linux

Debian aptverified · 92%

sudo apt install 64tass

Debian stable package indexes · 64tass · source: deb.debian.org

Fedora dnfverified · 92%

sudo dnf install 64tass

Fedora Rawhide package metadata · 64tass · source: dl.fedoraproject.org

Nixverified · 92%

nix profile install nixpkgs#_64tass

nixpkgs package indexes · pkgs/by-name/_6/_64tass/package.nix · source: api.github.com

overview

Package summary

Multi pass optimizing macro assembler for the 65xx series of processors

Project links

Commands and aliases

64tass

history

Project history and usage

64tass is a portable command-line cross assembler for the 65xx family of processors, especially valued in Commodore and 6502 retro-development circles.

Project history

The 64tass manual credits the original 6502tass for DOS to Marek Matula of Taboo, then notes that BigFoot/Breeze ported it to ANSI C and renamed it 64tass. The same credits say Soci/Singular later reworked the code over the years until little of the original code remained.

SourceForge lists the project as registered on 2010-04-15, with Soci as maintainer, and presents it as a cross assembler targeting the 65xx series of microprocessors.

Adoption history

The input package metadata lists 64tass in Homebrew, Debian, Ubuntu, Fedora, MacPorts, and Nix. That cross-distro presence is meaningful for an assembler in a niche architecture ecosystem: it lets retro-computing projects build reproducibly on modern developer machines and CI hosts.

How it is used

Developers use 64tass to assemble code for 6502-derived processors and related systems. The official SourceForge feature list emphasizes portable C with minimal dependencies, compatibility with Omicron TASS and TASM syntax, support for many 65xx variants, macros, conditional compilation, multiple output formats, and listings for debugging or export.

Why package nerds care

For package nerds, 64tass is a classic example of packaging a retro toolchain component as a modern Unix CLI. It keeps old 8-bit and 16-bit assembly workflows available through contemporary package managers without requiring DOS-era tooling or hand-built binaries.

Timeline

2010: SourceForge project registered.
2020: SourceForge file feed includes the 1.55 release line.
2025: SourceForge file feed lists 64tass 1.60.3243 source and binary archives.

Related projects

The official project page positions 64tass near other 6502 assemblers by citing familiar Omicron TASS and TASM syntax.
SourceForge related categories place it among assemblers and C assemblers.

Sources

https://sourceforge.net/projects/tass64/
https://sourceforge.net/projects/tass64/rss?path=/
https://sourceforge.net/rest/p/tass64
https://tass64.sourceforge.net/
input.source_facts.package-manager

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 post-install hook is recorded in formula metadata.
Homebrew bottle metadata is available for 8 platform targets.

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
`64tass`	cli	global executable

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 generated2026-07-08

manager version1.60.3243

manager updated

local dataok

upstreamnot checked

latest detectednot detected

https://tass64.sourceforge.net/

infoNo package-manager update timestamp was available.low confidence
infoRelease/tag comparison is only available for GitHub repositories.https://tass64.sourceforge.net/none confidence

install metadata

Package metadata

Package key	brew:tass64
Version	1.60.3243
Package manager	Homebrew
Package manager page	https://formulae.brew.sh/formula/tass64
Homepage	https://tass64.sourceforge.net/
Repository	https://sourceforge.net/p/tass64/code/ci/default/tree
Upstream docs	https://tass64.sourceforge.net/
License	GPL-2.0-or-later AND LGPL-2.0-or-later AND LGPL-2.1-only AND MIT
Source archive	https://downloads.sourceforge.net/project/tass64/source/64tass-1.60.3243-src.zip
Bottle	available (on arm64_linux, arm64_sequoia, arm64_sonoma, arm64_tahoe, arm64_ventura, sonoma, ventura, x86_64_linux)
Homebrew post-install	not defined
Service	none declared

registry facts

Source database details

Source Database	Homebrew formula API
Tap	homebrew/core
Full Name	tass64
Aliases	64tass
Version Scheme	0
Revision	0
Bottle Stable Root URL	https://ghcr.io/v2/homebrew/core
Deprecated	no
Disabled	no
Keg Only	no
URL Keys	stable

source database matches

Other package-manager records

Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.

MacPorts94%

64tass

sudo port install 64tass

installed executable or alias match
Matched by: 64tass

MacPorts ports tree · api.github.com · MacPorts ports tree: devel/64tass/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1

Debian apt92%

64tass 1.59.3120-2

cross (turbo) assembler targeting the MOS 65xx series of micro processors

http://tass64.sourceforge.net/

sudo apt install 64tass

Section: otherosfs
Architecture: amd64
1 dependencies
installed executable or alias match
Matched by: 64tass

Debian stable package indexes · deb.debian.org · Debian stable package indexes: 64tass from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz

Nix92%

_64tass

nix profile install nixpkgs#_64tass

installed executable or alias match
Matched by: 64tass

nixpkgs package indexes · api.github.com · nixpkgs package indexes: pkgs/by-name/_6/_64tass/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1

Ubuntu apt92%

64tass 1.59.3120-1

cross (turbo) assembler targeting the MOS 65xx series of micro processors

http://tass64.sourceforge.net/

sudo apt install 64tass

Section: universe/otherosfs
Architecture: amd64
1 dependencies
installed executable or alias match
Matched by: 64tass

Ubuntu 24.04 LTS package indexes · archive.ubuntu.com · Ubuntu 24.04 LTS package indexes: 64tass from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz

dnf92%

64tass 1.60.3243-6.fc45

Multi-pass optimizing macro assembler for the 65xx series of processors

https://tass64.sourceforge.net/

sudo dnf install 64tass

License: GPL-2.0-or-later AND LGPL-2.0-only AND LGPL-2.0-or-later AND LGPL-2.1-or-later AND MIT
Category: Unspecified
Architecture: x86_64
Source Package: 64tass
4 dependencies
1 provides
installed executable or alias match
Matched by: 64tass

Fedora Rawhide package metadata · dl.fedoraproject.org · Fedora Rawhide package metadata: 64tass from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/e5ca8ce900cd68f5419e1c39ae517343100b306336cbaeb70a3c153121d95094-primary.xml.zst

package graph

Links come from deterministic package relationships, av.db category and tag curation, ecosystem matches, and package hub membership.

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.

combined/tass64.yml

Used sources

Geiger risk classifier
Nucleus package database
av.db category and tag curation
cross-ecosystem install command graph
curated package history
external package-manager database matches
package relationship graph
package version freshness
package-page enrichment

Install tass64 with Homebrew, apt, dnf, MacPorts, Nix