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# Beetle VB (Mednafen Virtual Boy) - RetroBIOS

Type | libretro
Classification | community_fork
Source | https://github.com/libretro/beetle-vb-libretro
Upstream | https://mednafen.github.io/
Version | v0.9.36.1
Profiled | 2026-03-24
Cores | mednafen_vb
Systems | nintendo-virtualboy

Technical notes

Libretro port of Mednafen's Virtual Boy emulation module. No external BIOS or firmware files. The Virtual Boy has no boot ROM; the V810 CPU executes directly from the game ROM mapped at 0x07000000. Load() in libretro.cpp:1787 takes only ROM data. Upstream Mednafen supports an optional vb.pal palette file (Documentation/vb.html); the libretro port handles palette via core options instead.

No BIOS or firmware files required. Generated on 2026-03-25T14:56:43Z