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Beetle PCE (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
Systems nec-pc-engine
Verification mode existence
Technical notes

Libretro port of Mednafen's PCE-Accurate module. BIOS loaded from system directory at CD-ROM load time via PCE_LoadCD() in pce.cpp:441-460. Core option "pce_cdbios" selects which card image to use (default: System Card 3). DetectGECD() auto-detects Games Express discs and switches to gexpress.pce. Arcade Card mode (pce_arcadecard option, enabled by default) extends System Card 3 with extra RAM mapping via SYSCARD_ARCADE enum. No hash or size validation on BIOS load: file_open() then HuC_Load() reads data directly. DetectSGXCD() reads sector data to decide SGX mode but uses the same BIOS files.

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)

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

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

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

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

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

  • SHA1: 014881a959e0...
  • MD5: 6d2cb14fc3e1...
  • Aliases: gecard.pce
  • Source: libretro.cpp:1057-1058, settings.cpp:41, pce.cpp:374-411
  • Platforms: lakka, recalbox, retroarch, retrodeck, retropie, romm
  • pce_cdbios = 'Games Express' or auto-detected via DetectGECD().

Generated on 2026-04-18T08:05:07Z