Karmeck wrote on Today, 05:56:

it works but 88emu does not recognize it, probably a md5 mismatch. But hanks for letting me know.

I found that 88emu 2.2.25 will still take the rom as long as it's named "sc8820_internal.bin". The warning it displays is purely informational, it will still load it and work correctly in my testing. This dump is so new it happened after the 2.2.25 release, the new MD5 will need to be added to 88emu to get rid of the warning (and allow any filename) for the next release.

Karmeck wrote on Today, 05:56:

But really, about the missing roms aspect, are they really missing, like really, or just not easy to access? because, if you have the md5 value, that file is out there.

I think not easy to access since the hashes are known as you pointed out. Hopefully more surfaces soon, but we are in a pretty good spot with true SC-8820, JV-1080 and XV-3080 being shared now.