pub const DIAG_TIMEOUT: u8 = 0xFF; // 255u8Expand description
Moved to psx_io::cd::reader. Kept at this path for one stage so
psx_pack::cd::SectorReader still resolves; a re-export cannot carry a
deprecation.
SectorReader::diagnostics cause byte: the wait spun out; the snapshot
carries the raw status register and the last IRQ flag seen.