Origin: YYYY-MM-DD is the earliest known release date we could verify for public core families.
Core since: YYYY-MM-DD is the earliest known introduction date we could verify for a Jotego core family.
Released: YYYY-MM-DD is the earliest known Patreon or private-release date for a non-Jotego Patreon item.
Patreon: YYYY-MM-DD is the earliest known Patreon post with release files for that Jotego game or core.
Public: YYYY-MM-DD is the earliest known public release date for that core when it differs from the origin date.
Official is the latest public build currently packaged in Distribution_MiSTer.
Package: YYYY-MM-DD is the dated Jotego or Coin-op package represented in the catalog. It does not mean the title is still paywalled.
Timeline date lets you switch between core-family introduction, first playable availability, and package chronology.
Pre-release is reserved for cores or games we explicitly mark as alpha, experimental, or upstream-only. It is separate from Patreon or supporter paywalls.
Open source means public source code is available; external arcade GitHub rows require a MiSTer sys/ source tree. Closed source means the core is currently distributed without public HDL source in the repositories referenced by the catalog.
Dual SDRAM Enhanced means a separate enhanced console build is available from the tracked dual-SDRAM repository.
Changes since official links to upstream commits after that public release.
Download unstable goes to the latest direct nightly .rbf when a MiSTer-unstable-nightlies repo exists, otherwise it falls back to the core repo release file.
If a core has no Download unstable tag, no newer unstable build was detected for it.
Standalone year tags refer to the original launch year of the platform or arcade game, not the MiSTer core.
