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Dreamcast

Flycast

Émulateur Dreamcast, NAOMI et Atomiswave multiplateforme. Support Vulkan et OpenGL, option upscaling et widescreen hack.

Medium25 minDreamcast BIOS required
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In this guide

Flycast emulates the Dreamcast and Sega's whole arcade family (Naomi, Naomi 2, Atomiswave). It's available as a standalone build and as a RetroArch core.

1. System files

  1. For the Dreamcast, you need dc_boot.bin and dc_flash.bin, extracted from your own console.
  2. Place them in the location shown on this page (right-hand column): the data folder for the standalone build, RetroArch's system folder for the core.
  3. For the Naomi and Atomiswave arcade boards, each system has its own BIOS, to be placed in the same location.

2. Game formats

  • CHD — the best choice for the Dreamcast: a single file, lossless compression.
  • .gdi with its tracks, .cdi — also work but generate lots of files.
  • Arcade: zipped romsets, same as MAME.

3. Recommended settings

  • Renderer: Vulkan if your card supports it, otherwise OpenGL.
  • Internal resolution: 2x or 3x — the Dreamcast is lightweight, you can raise it without worry.
  • Enable Widescreen to switch some games to 16:9 without distortion.
  • The VMU (virtual memory card) is created automatically on first launch.

4. Not working?

  • "Cannot find BIOS" → files missing from the data folder, or misnamed.
  • An arcade game refuses to start → the specific BIOS for that board is missing (Naomi ≠ Atomiswave).