@mitu That didn't seem to work unfortunately. BUT after getting another batch of ROMs I was able to get them working! Not sure what was happening with the other ROMs since they worked on my PC but these ones seem to work fine. Hopefully I don't have any further issues.
A Sega CD game? That would probably instantly explain why it isn't working. I knew I found it in a pile of other TG-16 roms so that's why I stuck it there but if it belongs in the Sega CD pile then I'll give that a whirl.
I'll keep picking at this one rom and emulator at a time.
Has anyone played the Castlevania: Lords of Shadow games?
I have not. The last "new" CV game I played was 'Castlevania: The Adventure ReBirth' on Wiiware, so it's been quite some time. Konami has such a bad reputation these days, that it pays to be cautious. It really is a shame too because thirty years ago they could do no wrong.
From my understanding there wasn't any region protection for the CD based games and I remember trying some Japanese CDs in my TurboGrafx CD and TurboDuo about 10-15 years ago. I was surprised that they worked so well then!
I did some more research (or googling) and found a 3rd System Card v3.0 that is identified as being from Japan with an md5sum of 38179df8f4ac870017db21ebcbf53114. I tried Mirai Shounen Conan and Sylphia and they both worked on this BIOS. I also tried that 4 in 1 Super CD for the US Turbo Duo (this is the same one I had for my Duo which is also in storage lol) and it worked as well. The "System Card interface" looks just like ff1a674273fe3540ccef576376407d1d with "PC Engine" and "1991".
Also I was able to verify that the md5 of 0754f903b52e3b3342202bdafb13efa5 is indeed the USA version.