Once converted, verify the CHD using the command:
Japanese games heavily utilized unique formats that make CHD conversion especially beneficial: Psx Chd Japan
While Redump has cataloged thousands of discs, many Japanese PS1 titles remain "undumped" or exist only in non-verified formats. Redump maintains a "Japan Undumped Discs" list, which catalogs serial numbers of games that have not yet been verified, often including unique builds of "PS1 Classics" releases. Once converted, verify the CHD using the command:
Place your BIOS files in DuckStation’s designated BIOS folder (typically retrodeck/bios/ for bundled installations). A mismatched game region and BIOS region may cause compatibility issues, so ensure consistency. so ensure consistency.