mednafen_pce - RetroBIOS

Type	libretro
Classification	Community forks
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, 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 in repo 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, romm
• Default value for pce_cdbios option.

syscard2.pce optional in repo NTSC-J
CD-ROM System Card 2.0 (Japan)

• Source: libretro.cpp:1053-1054
• Platforms: lakka, recalbox, retroarch, retrodeck, retropie, romm
• pce_cdbios = 'System Card 2'.

syscard1.pce optional in repo NTSC-J
CD-ROM System Card 1.0 (Japan)

• Source: libretro.cpp:1055-1056
• Platforms: lakka, recalbox, retroarch, retrodeck, retropie, romm
• pce_cdbios = 'System Card 1'.

gexpress.pce optional in repo 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, romm
• pce_cdbios = 'Games Express' or auto-detected via DetectGECD().

syscard3u.pce optional in repo NTSC-U
CD-ROM System Card 3.0 (US / TurboGrafx-CD)

• Source: libretro.cpp:1059-1060
• Platforms: lakka, recalbox, retroarch, retropie, romm
• pce_cdbios = 'System Card 3 US'. Not in .info.

syscard2u.pce optional in repo NTSC-U
CD-ROM System Card 2.0 (US / TurboGrafx-CD)

• Source: libretro.cpp:1061-1062
• Platforms: lakka, recalbox, retroarch, retrodeck, retropie, romm
• pce_cdbios = 'System Card 2 US'. Not in .info.

Generated on 2026-04-03T20:37:39Z