mednafen_pce_fast - RetroBIOS

Type	libretro
Classification	Community forks
Source	https://github.com/libretro/beetle-pce-fast-libretro
Upstream	https://mednafen.github.io/
Version	v1.31.0.0
Profiled	2026-03-24
Cores	mednafen_pce_fast, pce_fast, beetle_pce_fast
Systems	nec-pc-engine
Verification mode	existence

Technical notes

Fork of Mednafen's pce_fast module (speed-optimized, no SuperGrafx support). Separate codebase from beetle_pce (mednafen/pce_fast/ vs mednafen/pce/). BIOS loaded via HuCLoadCD() at CD-ROM load time. Core option "pce_fast_cdbios" selects which card image to use (default: System Card 3). No Games Express auto-detection (unlike beetle_pce); user must select manually. No hash or size validation on BIOS load. Upstream pce_fast module only has a single pce_fast.cdbios string setting; 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:67, libretro.cpp:1755-1760
• Platforms: batocera, lakka, recalbox, retroarch, retrobat, retrodeck, retropie, romm
• Default value for pce_fast_cdbios option.

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

• Source: libretro.cpp:1762
• Platforms: lakka, recalbox, retroarch, retrodeck, retropie, romm
• pce_fast_cdbios = 'System Card 2'.

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

• Source: libretro.cpp:1764
• Platforms: lakka, recalbox, retroarch, retrodeck, retropie, romm
• pce_fast_cdbios = 'System Card 1'.

gexpress.pce optional in repo NTSC-J
Games Express CD Card

• Aliases: gecard.pce
• Source: libretro.cpp:1765-1766
• Platforms: lakka, recalbox, retroarch, retrodeck, retropie, romm
• pce_fast_cdbios = 'Games Express'. For unlicensed Games Express titles.

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

• Source: libretro.cpp:1767-1768
• Platforms: lakka, recalbox, retroarch, retropie, romm
• pce_fast_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:1769-1770
• Platforms: lakka, recalbox, retroarch, retrodeck, retropie, romm
• pce_fast_cdbios = 'System Card 2 US'. Not in .info.

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