Function quirk_for_crc 

pub fn quirk_for_crc(crc: u32) -> FdsQuirk

Look up the per-game FdsQuirk for a disk image by its CRC-32.

Returns FdsQuirk::NONE for any disk not in the table — the overwhelming majority. The table is the FDS analogue of the per-game mirroring / mapper overrides: a curated, growable list of titles whose drive timing the nominal model does not satisfy. CRC-32s are over the headerless side bytes (what FdsDisk::to_bytes produces and Fds::new hashes), so a fwNES-headered and a headerless dump of the same disk resolve to the same quirk.