z80dasm を Homebrew, apt, dnf でインストール

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• z80dasm

プロジェクトの歴史

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.

採用の歴史

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.

使われ方

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.

パッケージ好きにとっての重要性

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.

タイムライン

• 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.

ソース

• https://manpages.ubuntu.com/manpages/trusty/man1/z80dasm.1.html
• https://packages.fedoraproject.org/pkgs/z80dasm/z80dasm/index.html
• https://raw.githubusercontent.com/lvitals/z80dasm/main/NEWS
• https://raw.githubusercontent.com/lvitals/z80dasm/main/README.md
• https://tracker.debian.org/z80dasm