Link Dragon sound fix?

[djshok]

Pretty much what the title says.  All the roms of Link Dragon out there don't have any sound.  Apparently the original game has really cool music.  Anyone have a fixed version of the rom with the sound intact?

[taizou]

one year later...
yes!

http://hhug.me/stuff/Link%20Dragon%20(Unl)%20(overdump-music%20fix).zip

this isn't a new dump, it's the old one doubled up (ie to 512K instead of 256K, so everything is repeated once) which.. somehow fixes the music. i dunno much about mega drive stuff at all but i assume it's some kind of quirk of the mapper that isn't emulated in anything, like i guess for some reason it reads the music from the second 256K which the real cart just maps back to the first 256K? Something like that anyway.

(maybe someone who actually knows what they're doing could hack it properly so it works within 256K, but i am not that someone)

[etabeta78]

No offense meant to the original poster, but he probably needs to use a better emulator
both MESS and GenPlusGX have correct sound when using the original ROM...

simplifying the matter, MD CPU just masks out accesses beyond the end of the rom and reads back from the start of the file, so the emulator just needs to properly mirrors the rom in the CPU accesses like the real system does