> I'm trying out MK4 in MAME181 today. Just wondering if anyone has an answer to my > question above. Thanks.
The waveram viewer was only disabled for the zeusII graphics drivers (crusn exotica, the grid, midway skins) in MAME181. I just pushed a commit to change the waveram viewer to the 'v' key into git. You will either have to compile from source or wait for MAME 182 to be released.