install

Additional install commands

macOS

Homebrewverified · 100%

brew install z80dasm

local Homebrew formula metadata

Linux

Debian aptverified · 92%

sudo apt install z80dasm

Debian stable package indexes · z80dasm · source: deb.debian.org

Fedora dnfverified · 92%

sudo dnf install z80dasm

Fedora Rawhide package metadata · z80dasm · source: dl.fedoraproject.org

overview

Package summary

Disassembler for the Zilog Z80 microprocessor and compatibles

Project links

Commands and aliases

z80dasm

history

Project history and usage

z80dasm is a Unix-style command-line disassembler for the Zilog Z80 family, aimed at turning ROM images and other raw machine-code binaries from 1980s microcomputers back into readable Z80 assembly.

Project history

The project descends from dz80 3.0, a Z80 disassembler by Jan Panteltje. z80dasm kept that core lineage but fixed bugs, added a more Unix-like command-line interface, and focused on output that could be assembled back into the original binary.

Tomaz Solc developed z80dasm in the context of the Galaksija ROM disassembly, which explains the tool's practical reverse-engineering bias: labels, symbol files, code/data block hints, and careful handling of undocumented, illegal, and partial Z80 opcodes matter more than a polished GUI.

The 1.1 series added stronger symbol handling, split code/data blocks, fixes for relative-branch wrapping, and many undocumented Z80 instructions. The 1.2.0 news entry adds support for Z180-specific instructions, keeping the tool useful for related Zilog-compatible targets.

Adoption history

z80dasm is a niche package, but it has the kind of adoption that matters for retrocomputing and preservation work: it is present in Debian-family package archives, Fedora, Homebrew, and other Unix packaging ecosystems, so ROM-analysis workflows can depend on a small reproducible CLI instead of a one-off local build.

Its adoption is tied less to volume and more to trust in reversible output. The README says compatibility with z80asm was thoroughly tested, and the manpage-oriented interface fits scripts that compare disassembly, reassembly, and original binary output.

How it is used

Typical usage feeds z80dasm a binary or ROM dump, supplies an origin address, asks it to generate labels, and optionally provides symbol or block information so code and data are separated cleanly. The resulting assembly can be reassembled with tools such as z80asm, zasm, or the original Zilog assembler in compatible modes.

Why package nerds care

z80dasm is package-nerd significant because it is exactly the kind of tiny specialist tool that package managers preserve well: no external runtime library, a manpage-friendly CLI, and a focused job in old-machine archaeology.

It also shows why distribution packaging matters for preservation: the interesting artifact is often not the tool itself, but the old firmware, ROM, or operating system image that becomes easier to inspect when a reliable disassembler is one install command away.

Timeline

1994-2007: dz80 and z80dasm copyright history spans Jan Panteltje's original dz80 work and Tomaz Solc's z80dasm development.
2007: z80dasm 1.0 and 1.1 era work added Debian packaging changes, symbol-table rewrites, and code/data block support.
2009-2018: 1.1.x releases fixed branch, symbol, block, and undocumented-instruction handling.
1.2.0: Added Z180-specific instruction support and symbol-comment output.

Related projects

Related projects include dz80, z80asm, zasm, the original Zilog assembler, Galaksija ROM disassembly work, and other Z80/Z180 reverse-engineering tools.

Sources

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 12 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
`z80dasm`	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 version1.2.0

manager updated

local dataok

upstreamnot checked

latest detectednot detected

https://packages.debian.org/sid/z80dasm

infoNo package-manager update timestamp was available.low confidence
infoRelease/tag comparison is only available for GitHub repositories.https://packages.debian.org/sid/z80dasmnone confidence

install metadata

Package metadata

Package key	brew:z80dasm
Version	1.2.0
Package manager	Homebrew
Package manager page	https://formulae.brew.sh/formula/z80dasm
Homepage	https://packages.debian.org/sid/z80dasm
Repository	https://www.tablix.org/~avian/git/z80dasm.git
Upstream docs	https://sources.debian.org/src/z80dasm/1.1.6-1/README
License	GPL-2.0-or-later
Source archive	https://geeklan.co.uk/files/z80dasm-1.2.0.tar.gz
Bottle	available (on arm64_big_sur, arm64_linux, arm64_monterey, arm64_sequoia, arm64_sonoma, arm64_tahoe, arm64_ventura, big_sur, monterey, 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	z80dasm
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.

Debian apt95%

z80dasm 1.1.6-1

disassembler for the Zilog Z80 microprocessor

https://www.tablix.org/~avian/blog/articles/z80dasm/

sudo apt install z80dasm

Section: devel
Architecture: amd64
1 dependencies
1 optional deps
normalized package name match
Matched by: Z80dasm

Debian stable package indexes · deb.debian.org · Debian stable package indexes: z80dasm from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz

Ubuntu apt95%

z80dasm 1.1.6-1

disassembler for the Zilog Z80 microprocessor

https://www.tablix.org/~avian/blog/articles/z80dasm/

sudo apt install z80dasm

Section: universe/devel
Architecture: amd64
1 dependencies
1 optional deps
normalized package name match
Matched by: Z80dasm

Ubuntu 24.04 LTS package indexes · archive.ubuntu.com · Ubuntu 24.04 LTS package indexes: z80dasm from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz

dnf95%

z80dasm 1.1.3-24.fc44

Z80 Disassembler

http://www.tablix.org/~avian/blog/articles/z80dasm/

sudo dnf install z80dasm

License: GPL-2.0-or-later
Category: Unspecified
Architecture: x86_64
Source Package: z80dasm
2 dependencies
1 provides
normalized package name match
Matched by: Z80dasm

Fedora Rawhide package metadata · dl.fedoraproject.org · Fedora Rawhide package metadata: z80dasm 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/z80dasm.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 z80dasm with Homebrew, apt, dnf