So it looks like there will be some major chd changes coming soon to MAME. Basically the idea is to include metadata into the hashcalculation plus some more additional data. And the Viper System chds are bad anyway and will be replaced.

Since the inclusion of metadata into the hash will alter the checksum, all your chds need to get updated. Most likely chdman will offer a possibility to do so.

Currently I don't know and I cannot forsee how cmpro will react on the changes. I assume that the old chds are being read correctly, the hashes mismatch and cmpro will mark them as unneeded (and moves them to backup). I also assume that the deep verification which decompresses the chd and recalcs sha1/md5 will lead to the wrong hash, too.

As soon I got more information I will recode the chd routines...

So...don't wonder if next MAME's scan result looks odd ;)


Roman Scherzer