archtaurus RetroPieBIOS: a checksummed BIOS dump for the Raspberry Pi retro gaming image

What a BIOS collection is, and why RetroPie needs one

RetroPie is an image for the Raspberry Pi that turns the machine into an emulation frontend, and most of its emulators run without any extra files at all. The exceptions are the console and arcade systems whose hardware shipped with firmware stored in mask ROM. A PlayStation needs its BIOS to run discs, an arcade board needs its driver ROMs to boot its games, and a Commodore 64 needs its BASIC and KERNAL ROMs. Those files are copyrighted, they were never distributed freely, and they are the one thing an emulator cannot synthesise.

That is the gap this repository fills. The README describes it as the BIOS collection for RetroPie, and the installation instruction is correspondingly blunt: copy all files from the `BIOS` folder into your RetroPie's `BIOS` folder. No converter, no patcher, no config file. What matters is not that the collection exists, since several exist, but that it is checked.

The verification claim is specific enough to be useful. The README states that all BIOS files have been verified in agreement with `System.dat` version 1.19.0 from the libretro-database project. That is the community database of emulator and system requirements, so agreeing with it means these files are the ones current Libretro cores expect, not files that merely boot something.

The md5 test suite and what a passing run looks like

The repository's primary language is listed as Makefile, but the interesting code is a Jest test. `md5sum.test.js` walks the `BIOS` directory, hashes every file and asserts it equals the hash recorded in the database. The README shows what that run looks like, and the shape of the output tells you what the suite is actually checking:

PASS ./md5sum.test.js
  all files md5sum check
    ✓ md5sum("goldstar.bin") should be "8639fd5e549bd6238cfee79e3e749114" (2 ms)
    ✓ md5sum("neogeo.zip") should be "00dad01abdbf8ea9e79ad2fe11bdb182" (5 ms)

One assertion per file, each naming the exact binary and the exact expected hash. The filenames in that output are themselves a summary of the collection's scope: Panasonic 3DO variants such as `panafz1.bin` and `panafz10e-anvil.bin`, Atari 5200 and 7800 ROMs, Commodore files including `JiffyDOS_C64.bin`, MSX and MSX2 disks and ROMs, plus a long tail of arcade driver zips.

The Makefile wraps this so a contributor does not have to remember the npm commands, and its help text lists the available targets: `install` for dependencies, `test` to run the checksum tests, `result` to save output to a file, `merge` to merge development into master, and `clean` to remove `node_modules` and result files. Running the checks locally is the ordinary way to confirm an intact copy:

npm install
npm test

The `package.json` names the project `retropie-bios-collection` at version 4.7.3, depends on `crypto` and on `jest`, and declares `jest` as the test script. The 2026.04.18 release notes add that Node.js 20 or newer is required for testing.

Release discipline, and a gap in the timeline

The release history is short and irregular, which is worth noticing. The tags are 2026.04.17, 2026.04.18 and then a long jump back to 2023.05.07, published in June 2023. So this is a project that shipped a batch of dated snapshots roughly every twenty months rather than on a schedule, and the 2026 release is the current one. The default branch is `master`, and the Makefile has explicit machinery for it: a `merge` target that checks out master, pulls, merges development and pushes with tags, and a `development` target that hard-resets development to master with a force-with-lease push behind an interactive confirmation.

The 2026.04.18 notes are the most informative part of the whole repository. They list three changes: more BIOS files added to the latest versions list of `System.dat`, a fix to MD5 checksum validation, and an improved GitHub Actions workflow. The test count in the technical details is 392 passed and 13 skipped. There is a badge in the README for an all-BIOS-files MD5 check workflow, so verification runs on every push rather than only at tag time.

For a collection like this, the release date is the meaningful version. There is no semantic versioning scheme that maps onto what changes here, because a release may add forty files or correct one hash. Pinning a tag is the right instinct, and the last push was on 2026-09-13 with the repository not archived.

Thirteen skipped files, named explicitly

The README carries a warning that 13 files are skipped, and the release notes go further by saying why: Amiga BIOS ROMs and Dinothawr.zip are not included in this collection. The 2026.04.18 notes phrase the second exclusion differently, listing Dinothawr.zip as excluded due to an MD5 mismatch, which is a useful detail because it implies the file exists in the source data but does not match what libretro expects.

So the gap is concrete rather than mysterious. If you are setting up an Amiga core, you are not covered here and need another source. If you are chasing Dinothawr, expect to solve it yourself. Any other system that appears in `System.dat` but not in the passing list is in the same category, and the practical way to find out which is to run the suite and read the failures rather than to guess.

The 2026.04.18 release also carries a fix to MD5 checksum validation itself, which is a slightly alarming line to read on a repository whose entire value proposition is checksum accuracy. The reasonable reading is that a mismatch was being reported incorrectly or not reported at all in some case, not that known-good files were silently wrong, but it is a reminder to run the verification yourself rather than trusting a downloaded archive because of its name.

The legal section, which is the part to read twice

The README states that the BIOS files are provided for educational and archival purposes only, and then puts three obligations on the reader: ensure you own the original hardware the BIOS were extracted from, comply with copyright law in your jurisdiction, and remove the files if the copyright holder requests it. It adds that no infringement is intended and invites rights holders to open an issue for removal.

This is an honest and reasonably common formulation for a ROM collection, and it is also a statement of position rather than a legal defence. What it means practically is that the repository's inclusion of a file is not a grant of permission from the rights holder, and the burden sits with whoever copies it. Whether your own situation is covered depends on your jurisdiction and on whether the hardware is yours.

Two smaller notes on the repository's own paperwork. `package.json` declares an MIT licence, though GitHub's licence detection does not report one for this repository, so the licensing picture is less tidy than the usual permissive project. And the tree includes `alipay.jpg` and `wechat.png`, which indicates the author is soliciting donations through Alipay and WeChat Pay. Neither fact is disqualifying, but both belong in the picture of what kind of project this is: a well-tested volunteer collection, not a project with a foundation or a company behind it.

RetroPie's own downloaders, and when to skip this entirely

The fairest comparison is with what RetroPie already does for you. The RetroPie image includes setup scripts that can fetch many of the BIOS files directly from their intended sources, which has the advantage of being an authorized channel and of fetching files that match your core version at the time you install. If you only need a PlayStation BIOS and a handful of arcade boards, that route is slower one file at a time but gives you a cleaner provenance story.

This collection's advantage is the opposite: breadth in one download, and a hash check against a single database version. It is the better choice when you are setting up a Pi with many systems at once, when you want a known snapshot rather than whatever a downloader serves today, or when you are assembling an image to deploy repeatedly.

What you should not do is treat a passing checksum suite as a legality signal or as a guarantee of authenticity in a broader sense. The suite proves a file matches a recorded hash; it does not prove who added the file, when, or under what licence. The trees also contain `System.dat` and `MoreBIOS.dat` as local copies, which means the reference data is vendored in rather than fetched live, so a `make test` run checks against a snapshot the repository chose, not necessarily the current libretro-database.

Editorial conclusion

This repository is a shortcut, not a tutorial, and it is worth understanding exactly what it shortcuts. RetroPie can find much of this BIOS on its own through its own downloaders, and what this collection adds is breadth you would otherwise assemble file by file, plus a machine check that each file matches the libretro database rather than a random upload. The 2026.04.18 release reports a suite of 392 passing tests and 13 skipped files, and the skipped set is named: Amiga BIOS ROMs and Dinothawr.zip are deliberately absent, so an Amiga core or Dinothawr will still need its own source. The legal section puts the burden on you to own the original hardware and to remove files on request, which is the part to read before you copy anything. Start by comparing the file list against what your RetroPie install already has, then fetch only the systems you actually intend to run.

Frequently asked questions

Official sources

1. archtaurus/RetroPieBIOS on GitHub
2. Issues
3. README
4. Releases