Beetle VB (Mednafen Virtual Boy) - RetroBIOS¶
| Type | libretro |
| Source | https://github.com/libretro/beetle-vb-libretro |
| Version | v0.9.36.1 |
| Profiled | 2026-03-18 |
| Cores | beetle_vb |
| Systems | nintendo-virtualboy |
No BIOS or firmware files required. This core is self-contained.
Beetle VB is a port of Mednafen's Virtual Boy emulation module to libretro. Based on Mednafen v0.9.36.1.
No external BIOS or firmware files are required. The Virtual Boy hardware did not use a traditional boot ROM or BIOS in the way that consoles like PlayStation or Saturn do. The V810 CPU starts execution directly from the game ROM mapped at 0x07000000.
The core loads the ROM into GPROM (Game Pak ROM), mirrors it if smaller than 64KB, and initializes 64KB of WRAM and optional GPRAM (Game Pak RAM/SRAM for saves). The VIP (Virtual Image Processor), VSU (Virtual Sound Unit), and hardware timer are all emulated in software with no firmware dependencies.
The libretro .info file (mednafen_vb_libretro.info) declares no firmware entries and no system files.
ROM extensions: .vb, .vboy, .bin
Generated on 2026-03-20T19:12:20Z