I've extracted the main game .bin file from a few of the Sega Naomi CHD images using CHDMAN and IsoBuster so that I could try the games on demul which is handy when a specific game doesn't run properly in MAME yet.
One such example is Chaos Field but for some reason I'm getting an error when trying to extract the disc image out from the CHD using CHDMAN -extractcd
Every other Naomi game I've done so far appears to be this big: 1.20 GB (1,291,600,800 bytes)
For some reason Chaos Field comes out this big: 1.05 GB (1,138,202,400 bytes)
Consequently IsoBuster can't find the usual data so I was just wondering if the Chaos Field CHD is corrupt or needs a fix? Or if I'm doing something wrong??! I've verified that the CHD I've got is ok using CHDMAN -verify and the SHA-1 value displayed using -info matches the correct value as well so I don't think it's just my particular CHD.
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