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Does Demul require special roms or CHD images?

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8BitMonk:
I've been setting up Demul lately and am having problems with some of the Naomi games. I've been getting the 'rom missing xxxx.bin file' error message. I'm using a set of mame .151 roms fully cmpro checked as my basis. Does Demul (.582 in particular) need special versions of the roms or do the CHD images need to be converted to GDRoms? I've been looking and am finding info that's either unclear or conflicting.

Some things I've heard and tried that haven't worked:

1.) Point the gdrom plugin in demul to the appropriate CHD.
2.) Use adebug version of mame to run the offending rom and look for a decrypted file in the folder to add to the roms zip file.
3.) Use older versions of the roms and CHD's.
4.) Downloading what was supposed to be Demul .582 versions of the roms. Ended up most weren't Naomi games.

BadMouth:
The Demul roms are whatever MAME roms were current when that version of Demul was released.
A few times the Demul romset has been ahead of MAME though and included roms not yet in MAME.
(They are usually added to MAME shortly thereafter)

8BitMonk:
Thanks for the info. So I guess for .582 it would be the .150 romset? Not sure why it wouldn't like some of them from the .151 set, doesn't seem like much changed in naomi roms from .150 to .151. I'd say about 80% of the naomi roms from .151 work for me. The ones with CHD's seem to be the most likely to give me the 'xxxx.bin' is missing.

BadMouth:
Might be the format of the CHD.

There were recent changes to the CHD format.  (from "version 4" to "version 5")
If you run them through clrmamepro, I think it gives you the option of which format to use, but I haven't messed with it personally.

EDIT:  Found a post from when .58 was released where one of the devs said version 5 chds weren't supported.
http://www.mameworld.info/ubbthreads/showflat.php?Number=311211

8BitMonk:
Huh, interesting. I had actually read that post but not read far enough down into it.

Still not clear on the consensus after reading it though, are they saying that v4 CHD's will work and V5 won't. If so, any idea when the CHD's went from v4 to v5 so I know which romset to pull the v4 versions from? Maybe if I used an old dat from .148 (or whenever the v4 CHD's existed) and rebuilt the CHD's I wanted from the .151's that'd do the trick. 

My .151 set of roms and CHD's completely checked out in clrmamepro and I don't remember seeing a v4 or v5 option, have to look again.

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