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Pristine X68000 / 純X68000


XML Hash Files

Pristine X68000 English / ASCII

純X68000 (本名) Original / Unicode

純X68000 (日本語) Japanese / Shift-JIS

純X68000 (拡張名) Extended Names

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Please see this page for details on the different forms listed above.

Synopsis

This is a preservation project targeting X68000 floppy disks. All entries are based on dumps of original disks and have been determined by us to be in their original, unmodified state (pristine) with very high confidence.

The main page has more information about our preservation projects, goals, and principles. It should go without saying, but since there are certain sanctimonious people out there with a tendency to jump to conclusions: we publish hashes, not any material copyrighted by others.

Q&A

Q: What is all this "hash" stuff?

A: A cryptographically secure hash is a large number, or "digest", that represents the contents of a (usually) much larger file in such a way that it is infinitesimally unlikely for another file of the same size to have the same hash.

Hashes can therefore be used to verify that your disk images match our verified images, without violating copyright laws.

Programs like ClrMamePro or Romulus can ingest the XML files we provide and scan your disk images. If your images match our hashes, they will be automatically renamed and you can be confident that they are in the same state as when they were originally created. (You should probably mark them read-only to keep them that way.)

Q: How do I create images of my original disks?

A: There are several ways to do this depending on what hardware you have. Please don't hesitate to contact us for assistance.

Q: Why can't I match certain images created from my original disks against your hashes?

A: There are several possibilities. We would be delighted to assist you.

Q: Why is it so important to preserve images of the original disks?

A: Because images of unknown provenance are often modified, possibly in ways that can have subtle impacts. It is impossible to identify modifications with absolute certainty unless one has access to the original disks, and even then there can be further difficulties due to the fact that floppy disks are not a read-only medium!

Another benefit is that we have discovered newer/better versions of certain games that are not in circulation and would have been lost to history.

Q: Why don't many of the images which match these hashes work for me?

A: For high-compatibility equivalents, use images that match the Jouyou ("daily use") set. Certain emulators will also work.

Q: What is the difference between this set and the Jouyou set?

A: Although the Jouyou ("daily use") set similarly contains many pristine images and is based on real disk images, it also includes hashes of non-pristine images that have been "fixed" in order to be more usable. A hypothetical set of patches to create fixed images from their pristine forms would be a simple way to achieve both purity and convenience, so why not have both?

Keep in mind that the Jouyou set is a side benefit of the preservation work being done here, so even if you only care about the Jouyou images, supporting our preservation efforts will still benefit you.

Q: Why does this set only cover a fraction of the X68000 catalog?

A: Our current contributors' combined collections don't comprise the complete catalog. You are welcome to help us accelerate the process by volunteering.

Contact information



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