A Cycle-Accurate Virtual Boy Emulator
The GUI
This is an attempt to build the first cycle-accurate Virtual Boy emulator. It also supports a rich debugging environment for homebrew software.
This emulator is not intended for playing games. No present-day CPU can run it full speed anyways (hence its name).
Usage
Click here to run the current version in your browser.
Features
- Cycle-accurate timing for all components in the VB (including the VIP, CPU, memory bus, timer, etc.)
- Memory dump window
- CPU status window
- Oscilloscope window for monitoring timing of each cartridge pin
- Expansion device emulation for Overdrive Cart
- Support for symbolic debugging by loading an ELF image
- Performance analyzer with profiling for finding hot functions and basic blocks
Project Status
- Timings are more accurate than any other emulator out there, but still far from perfect given abysmal documentation for the NEC V810’s pipeline
- Some rare instructions are unimplemented (floats and bitstrings)
- Can play some commercial games without issue and Elevated Speed