# libElysianVMU: reconstructing the Dreamcast Visual Memory Unit

> libElysianVMU reconstructs the Sega Dreamcast Visual Memory Unit as a C17 emulator core. It models the VMU CPU, memory, display, buzzer, and flash filesystem, supports official BIOS images, and handles VMU formats including VMI, VMS, DCI, and DCM. The repository also contains instruction-set, memory-map, and file-format documentation.

- Type: Case study
- Targets: Firmware
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-09
- Original resource: <https://github.com/gyrovorbis/libevmu>
- Primary source: <https://github.com/gyrovorbis/libevmu/blob/2b155021472a11785a4297cc43f4d5c7fca7a5d4/README.md>
- Catalog page: <https://awesomerea.org/resources/libelysianvmu-case/>
- Record JSON: <https://awesomerea.org/resources/libelysianvmu-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/libelysianvmu-case/index.md)

## Requirements & limits

- **Prerequisites:** Building requires CMake and initialized Git submodules.
- **Limits:** Microsoft Visual Studio support is a work in progress.
- **License:** MIT license.

## Primary sources

1. <https://github.com/gyrovorbis/libevmu/blob/2b155021472a11785a4297cc43f4d5c7fca7a5d4/README.md>

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## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.