I'm trying to answer a few Doctor V64 questions on another forum. My V64 has been sat in the cupboard for the past few years, so my memory is sketchy. He says he can't update the BIOS from CD, he's currently on 1.41B. Found an answer: My question was, does the BIOS extension have to be renamed to something like .BIN? I vaguely remember a site that had a list of all the changes that each BIOS had. Does anyone have a list?