I think you all should try BizHawk because now you can track down the code that you needed for amy game that you want to hack. I only tested out for Sega Genesis and they have it for SNES too It also tracks down music as well and in Z80.
I tried using it before but I can't figure out how to produce a disassembly with a generated .cdl file (at least for MD/SMS/GG/SNES stuff). The source code for Bizhawk has the "disassemble" part of the code/data log menu unimplemented, so how would you use it? I just use Exodus for Megadrive stuff.