Congrats and from a relative and also an acquaintance (both DC hardware owners)...a thanks from them as well since they don't post here. They will be thankful with this specific support being in MAME source on the way of being in a future official release.
It will come in handy in case they need to make backups of their own specific discs in the future.
-- support Redump extended bin/cue format for Dreamcast discs #7422
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DC images support update
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