> Thanks redk9258. I have tried to extract it to a raw-file with v5 and compress it
> again to a chd with v4. Verify and info has passed but I'm not 100% sure if this
> works really ...
> I will have to try it with a game....
Is there some reason you're doing this? I have to strongly caution against putting anything back into v4, as it omits data that is important for correct emulation and "misplaces" some other data (it also gets much worse compression ratios on some games, but that's not as big of a deal). And actually distributing v4 CHDs is one sure way to draw the everlasting ire of MAMEdev.
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