So, it seems that cdi-emu does have better preliminary DVC support than has been commonly reported / realised, it is just that you have to have a very specific DVC bios. Most bioses that I have seen available are the VMPEG bios, but according to the emulator author, currently only the GMPEG bios is reasonably functional to run things like 7th guest etc. If you use the VMPEG bios it will crash at the first screen.

As quoted:

>What I call "proof of concept" DVC support has been in CD-i Emulator since 2010 or so. It already works well enough to run The 7th Guest and a number of other titles, but only for a specific version of the DVC cartridge (the so-called "Gate Array" version, GMPEG for short). Getting it to run on the other versions (VMPEG and IMPEG) is just a matter of bugfixing, the basic emulation for those versions is there already as they are architecturally very similar. But before that is going to happen I want to fix the issues with the current MPEG emulation which are mostly a question of emulation architecture (exact issues are technical and I won't go into them right now).

See https://www.theworldofcdi.com/community/emulators/announcing-cd-i-emulator-version-0-5-3-beta6-for-windows/

And also https://www.cdiemu.org/cditypes/

Unfortunately I have not been able to track down such a GMPEG DVC bios in order to test this, but it is at least something as cdi-emu seems to be considered the most robust of the cd-i emulators from what I have seen.

If anyone has such a bios dump and manages to test things out, it would be interesting to hear from you.