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Dream Explorer 0.8.5

About | Help | Resources | Downloads | Contribute | Donate

Dream Explorer (a.k.a VMU Tool) is a mini OS for the Dreamcast that allows you to explore the content of your VMU, PC, and CD/GD, and open their files in the numerous bundled tools.

Among other things you can easily backup up VMU files to PC and vice versa, or download VMU files from CD. DCI and VMI+VMS files are supported as well as raw or DCM dumps.

The VMU menu lets you:
  • browse your VMUs (includes hidden files)
  • unlock 44 extra blocks for your VMUs
  • compress/uncompress VMU files
  • draw your own icon for the VMU screen
  • defragment the VMU files
  • play VMU minigame on your TV with the VMU emulator
  • change the background image of the Dreamcast's boot menu
  • hexedit VMU files
  • view PSO screenshots
  • edit Gameshark CDX codes
  • and much more...

The PC/CD explorer lets your freely browse the directories of your PC's hard drive disk or the CD/GD inserted in your Dreamcast.

You can open BMP, JPEG and PNG images as well as PVR textures in an image viewer with many features such as zoom, rotation, flipping, slideshow...

There's also an audio player for playing MP3, Ogg Vorbis and Wave sounds with a timer displayed in real time.

And if you want to read text files easily from your Dreamcast you can open them in the text viewer. It displays formatted text with auto carriage return.

The GUI is fully themable. You can select a wallpaper from your PC or a CD/GD in your Dreamcast. The menus' background color and opacity as well as text's color can be changed in options or loaded from a theme file.

Menus texts are translated to English (fully) and French (mostly), and also partly to German, Dutch, Portuguese, Spanish, Swedish and Polish.

You can use the pad or the Dreamcast keyboard to browse menus and enter text, keyboard's keys position can be changed in options.

Donations motivate me a lot and are greatly appreciated. If you want to help follow instructions described on this page.

Upload your files to share them with everybody and free your VMU safely: VMU uploader for DC & PC.

Please report bugs to (try to explain them as clearly as possible, in english or french).

Thanks to TheGatesOfBill for free hosting at

Thanks for suggestions and bugs reports:
  • Michael (also a generous donator!)
  • John
  • Sizious
  • Oggy
Also thanks to everyone who offered to help.

Dream Explorer for Dreamcast aka VMU Tool programmed by Speud.

Some of the images were made by WaCk0.

Original libraries used belong to KalistiOS

The VMU emulator SoftVMS was originally programmed by Marcus Comstedt (very helpful site) and ported to the Dreamcast from scratch by Speud.

Partial translations made by:
  • law (german)
  • Captain Skyhawk (dutch)
  • WaCk0 (portuguese)
  • Bucanero (spanish)
  • Rastaman33 (swedish)
  • M@jk (polish)

Menus icons iCandy Junior © 2004 FOOOD's Icons.

Additional fonts found at and and converted with Celestia Font Texture Generator

Files included in the CD:

  VMU saves with agreement of webmasters from:

  • Skies of Arcadia™ wallpapers © SEGA/OVERWORKS
  • Dead or Alive™ wallpapers © Tecmo/Team NINJA
  • Phantasy Star Online™ wallpapers © SEGA/SONIC TEAM
  • Shenmue™ wallpapers © CRI/AM2
  • Sonic Adventure™ wallpapers © SEGA ETERPRISES, LTD.
  • DC girl wallpaper by Half_Breed found at
  • Jet Set Radio™ wallpapers found at

  • Shenua music from Shenmue™ Orchestra Version by Toshiyuki Watanabe
  • Revolution to the Origin Part 1 music from Phantasy Star Online™ OST by Hideaki Kobayashi
  • Yafutoma Dawn music from Eternal Arcadia™ OST by Saori Kobayashi
  • Seung Mina music from Soul Calibur™ OST Eye to Eye, Blade to Blade
  • Strider Hiryu music from Marvel VS Capcom™ OST
  • Ready Steady Go from Full Metal Alchemist OST by Arc en Ciel
  • Sakura Saku music from Love Hina OST by Hayashibara Megumi
  • Shizuku music from Great Teacher Onizuka OST
  • Opening music from Ghost in the Shell OST

Sega, Dreamcast, the Dreamcast logo and Visual Memory are either registered or trademarks of Sega Enterprises, Ltd.

Known bugs (october 14, 2006)

  • the screen freezes in some menus if you select german language, choose another language to avoid this problem (thanks to Christoph and Christian)
  • background music might crash the program sometimes, disable it in sound options if you often notice this problem
  • if you boot the program from DC Hakker some menus won't be displayed (1st screen, theme selector, audio player, image viewer, VMU emulator, codes editor, text viewer), try another program to boot Dream Explorer or use the selfboot image (thanks to Minti)
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© Speud - Blue Swirl