mednafen_pce - RetroBIOS¶
| Type | libretro |
| Classification | community_fork |
| Source | https://github.com/libretro/beetle-pce-libretro |
| Upstream | https://mednafen.github.io/ |
| Version | v0.9.38.7 |
| Profiled | 2026-03-24 |
| Cores | mednafen_pce |
| Systems | nec-pc-engine |
| Verification mode | existence |
Technical notes
Fork of Mednafen's pce module (accurate, with SuperGrafx and CD support). Separate codebase from mednafen_pce_fast (mednafen/pce/ vs mednafen/pce_fast/). BIOS loaded via PCE_LoadCD() at CD-ROM load time. Core option "pce_cdbios" selects which card image to use (default: System Card 3). DetectGECD() auto-detects Games Express discs and overrides to gexpress.pce. Arcade Card mode (pce_arcadecard option, enabled by default) extends System Card 3 with extra RAM mapping. No hash or size validation on BIOS load. Upstream pce module has configurable pce.cdbios/pce.gecdbios string settings; the 6-option dropdown is a libretro addition.
6 files | 1 required, 5 optional | 6 in repo, 0 missing
syscard3.pce -required, NTSC-J
: CD-ROM System Card 3.0 (Japan)
- Source:
libretro.cpp:1051-1052, settings.cpp:40 - Platforms: batocera, lakka, recalbox, retroarch, retrobat, retrodeck, retropie
- Default value for pce_cdbios option.
syscard2.pce -optional, NTSC-J
: CD-ROM System Card 2.0 (Japan)
- Source:
libretro.cpp:1053-1054 - Platforms: lakka, recalbox, retroarch, retrodeck, retropie
- pce_cdbios = 'System Card 2'.
syscard1.pce -optional, NTSC-J
: CD-ROM System Card 1.0 (Japan)
- Source:
libretro.cpp:1055-1056 - Platforms: lakka, recalbox, retroarch, retrodeck, retropie
- pce_cdbios = 'System Card 1'.
gexpress.pce -optional, NTSC-J
: Games Express CD Card
- Aliases:
gecard.pce - Source:
libretro.cpp:1057-1058, settings.cpp:41, pce.cpp:373-411 - Platforms: lakka, recalbox, retroarch, retrodeck, retropie
- pce_cdbios = 'Games Express' or auto-detected via DetectGECD().
syscard3u.pce -optional, NTSC-U
: CD-ROM System Card 3.0 (US / TurboGrafx-CD)
- Source:
libretro.cpp:1059-1060 - Platforms: lakka, recalbox, retroarch, retropie
- pce_cdbios = 'System Card 3 US'. Not in .info.
syscard2u.pce -optional, NTSC-U
: CD-ROM System Card 2.0 (US / TurboGrafx-CD)
- Source:
libretro.cpp:1061-1062 - Platforms: lakka, recalbox, retroarch, retrodeck, retropie
- pce_cdbios = 'System Card 2 US'. Not in .info.
Generated on 2026-03-25T14:56:43Z