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Beetle PCE (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

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, NTSC-J : CD-ROM System Card 3.0 (Japan)

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

  • SHA1: d02611d99921986147c753df14c7349b31d71950
  • MD5: 0754f903b52e3b3342202bdafb13efa5
  • Source: libretro.cpp:1059-1060
  • Platforms: lakka, recalbox, retroarch, retropie
  • pce_cdbios = 'System Card 3 US'

syscard2.pce -optional, NTSC-J : CD-ROM System Card 2.0 (Japan)

  • SHA1: 88da02e2503f7c32810f5d93a34849d470742b6d
  • MD5: 3cdd6614a918616bfc41c862e889dd79
  • Source: libretro.cpp:1053-1054
  • Platforms: lakka, recalbox, retroarch, retrodeck, retropie
  • pce_cdbios = 'System Card 2'

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

  • SHA1: 2bea3dac98f84b2f2f469fa77ea720b8770d598d
  • MD5: 94279f315e8b52904f65ab3108542afe
  • Source: libretro.cpp:1061-1062
  • Platforms: lakka, recalbox, retroarch, retrodeck, retropie
  • pce_cdbios = 'System Card 2 US'

syscard1.pce -optional, NTSC-J : CD-ROM System Card 1.0 (Japan)

  • SHA1: a39a66da7de6ba94ab84d04eef7afeec7d4ee66a
  • MD5: 2b7ccb3d86baa18f6402c176f3065082
  • 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

  • SHA1: 014881a959e045e00f4db8f52955200865d40280
  • MD5: 6d2cb14fc3e1f65ceb135633d1694122
  • Aliases: gecard.pce
  • Source: libretro.cpp:1057-1058, settings.cpp:41, pce.cpp:374-411
  • Platforms: lakka, recalbox, retroarch, retrodeck, retropie
  • pce_cdbios = 'Games Express' or auto-detected via DetectGECD().

Generated on 2026-03-25T14:56:43Z