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Beetle PSX (Mednafen PSX) - RetroBIOS
Type libretro
Classification community_fork
Source https://github.com/libretro/beetle-psx-libretro
Upstream https://mednafen.github.io/
Version v0.9.44.1
Profiled 2026-03-24
Cores mednafen_psx, mednafen_psx_hw
Systems sony-playstation
Technical notes

Region-based BIOS selection: the core picks JP/NA/EU firmware based on disc region. SHA1 validated with warning on mismatch (does not block loading). SHA1 and alternate filenames sourced from MAME psx.cpp (libretro.cpp:184). Override option allows using PSP or PS3 extracted PS1 BIOS as region-free alternative. "Skip BIOS" option patches BIOS ROM but causes compatibility issues. Upstream Mednafen loads the same 3 region BIOS; override BIOS are libretro additions.

5 files | 3 required, 2 optional | 5 in repo, 0 missing

scph5500.bin -required, both, NTSC-J : SCPH-5500 (v3.0 09-09-96 J)

scph5501.bin -required, both, NTSC-U : SCPH-5501, 5503, 7003 (v3.0 11-18-96 A)

  • Size: 512.0 KB
  • SHA1: 0555c6fae8906f3f09baf5988f00e55f88e9f30b
  • MD5: 490f666e1afb15b7362b406ed1cea246
  • Aliases: SCPH5501.bin, SCPH-5501.bin, scph5503.bin, SCPH5503.bin, SCPH-5503.bin, scph7003.bin, SCPH7003.bin, SCPH-7003.bin
  • Validation: sha1
  • Source: libretro.cpp:258-270
  • Platforms: batocera, emudeck, lakka, recalbox, retroarch, retrodeck, retropie

scph5502.bin -required, both, PAL : SCPH-5502, 5552 (v3.0 01-06-97 E)

  • Size: 512.0 KB
  • SHA1: f6bc2d1f5eb6593de7d089c425ac681d6fffd3f0
  • MD5: 32736f17079d0b2b7024407c39bd3050
  • Aliases: SCPH5502.bin, SCPH-5502.bin, scph5552.bin, SCPH5552.bin, SCPH-5552.bin
  • Validation: sha1
  • Source: libretro.cpp:272-282
  • Platforms: batocera, emudeck, lakka, recalbox, retroarch, retrodeck, retropie

psxonpsp660.bin -optional, libretro, Auto : PSP embedded PS1 BIOS (region-free override)

  • Size: 512.0 KB
  • SHA1: 96880d1ca92a016ff054be5159bb06fe03cb4e14
  • MD5: c53ca5908936d412331790f4426c6c33
  • Aliases: PSXONPSP660.bin
  • Validation: sha1
  • Source: libretro.cpp:190-195
  • Platforms: batocera, lakka, retroarch, retrobat, retrodeck, retropie
  • override_bios=1. Falls back to region BIOS if not found.

ps1_rom.bin -optional, libretro, Auto : PS3 embedded PS1 BIOS (region-free override)

  • Size: 512.0 KB
  • SHA1: c40146361eb8cf670b19fdc9759190257803cab7
  • MD5: 81bbe60ba7a3d1cea1d48c14cbcc647b
  • Aliases: PS1_ROM.bin
  • Validation: sha1
  • Source: libretro.cpp:198-203
  • Platforms: lakka, recalbox, retroarch, retrodeck, retropie
  • override_bios=2. Falls back to region BIOS if not found.

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