Add PC Engine CD / TurboGrafx-16 CD support #6
Description
Summary
Add support for identifying PC Engine CD-ROM² / TurboGrafx-16 CD games.
Background
The PC Engine CD-ROM² (1988) was the first CD-based game console. It uses standard Red Book audio CDs with Yellow Book data tracks, making discs readable by any standard CD/DVD drive.
Technical Details
- Media type: Standard CD (Red Book audio + Yellow Book data)
- Track layout: Track 1 is typically a Mode 1 data track (2048 bytes/sector)
- Identification method:
- First sector contains header with "PC Engine CD-ROM SYSTEM" or similar identifier
- Games store metadata in first few sectors of data track
- No standardized serial number field like PSX/PS2
Proposed ID Method
Since there's no standard serial number, identification would need:
- Volume label from ISO9660 (when present)
- First sector signature detection
- Boot file CRC/hash for unique identification
Implementation Notes
- Can reuse existing ISO9660 parsing infrastructure
- May need custom sector 0 parsing for boot signature
- Database lookup would likely use composite key (volume label + file CRC)
References
- PC Engine CD system documentation
- Related consoles: SuperGrafx, PC-FX (may share format)