The text is all in Chinese, though the back states “Windows 98 / ME / 2000 / XP, Mac OS 9.1, LINUX2.4”. I thought it was very interesting that this adapter came in such complete packaging. This marked my third lifetime delivery from China and curiously, all 3 of the shipments have pertained to the Sega Dreamcast. I put in an order via the website and in about 2 short months, the item arrived from China. However, there are other uses such as multimedia playback, system exploration, BIOS reprogramming, high-level programming, and probably a few other things I haven’t figured out yet. Presumably, users of this device leverage the latter use case more than the former, i.e., download ripped games, load them on the SD card, and launch them using DreamShell. What can you do with this thing? Undoubtedly, the primary use is for backing up (ripping) the contents of GD-ROMs (the custom optical format used for the DC) and playing those backed up (ripped) copies. I have a strange feeling that this post might become the unofficial English-language documentation on the matter. Searching for these topics tends to turn up results from various forums where people are trying to cargo-cult their way to solutions. Working with this adapter and the software requires some skill and guesswork. The primary software that leverages the DC SD adapter is called DreamShell. Of course I wanted to see what I could do with it. When I was playing around with Dreamcast hacking early last year, I became aware that there is such a thing as an SD card adapter for the DC that plugs into the port normally reserved for the odd DC link cable. Nope! I’m never going to let go of the Sega Dreamcast hacking.

Sega dreamcast iso file from cdi file