Beetle VB (Mednafen Virtual Boy)

Beetle VB (Mednafen Virtual Boy) emulates Nintendo Virtual Boy.

About this profile

Detail	Value
Type	libretro
Classification	Community fork
Source	https://github.com/libretro/beetle-vb-libretro
Upstream	https://mednafen.github.io/
Version	v1.31.0, stated in libretro.cpp
Revision	libretro/beetle-vb-libretro@d5ae54c8e23b
Profiled	2026-03-24
Profile	YAML, JSON
Cores	mednafen_vb, vb, beetle-vb
Systems	Nintendo Virtual Boy

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:490 takes only ROM data. Upstream Mednafen supports an optional vb.pal palette file (Documentation/vb.html), while the libretro port handles palette via core options instead.

No BIOS or firmware files required.

Next steps

• Get your files, for the setup you play on
• Every system, and the files each one needs
• When a game does not start

Data as of 4 November 2026.