Date: Fri, 18 Apr 2008 11:44:06 -0700 From: Al Kossow I was approached several years ago to decode a pile of Victor 9000 diskettes and got as far as deciphering the GCR. The customer then decided to abandon the project, so I never got any farther than that. I think that I still have the samples I worked with in my collection. GCR wasn't terribly unusual in the 70s. Commodore was definitely not the first to use it on disk drives, in spite of what some may claim (it may have been Sperry/ISS). ISTR that one of the rags (EDN, perhaps) had a great article at the time on exactly how the whole Victor disk thing worked. I never bothered to keep a copy of it, unfortunately. I never liked Victor as a company. Early on, they made it a point to file suit for trademark infringement against any US electronics operation with the name "Victor", including, IIRC, an appliance store owner who had been using the name for 20 years. It was a bullying tactic that I found distasteful. I remember that the sign on their building was quite visible as you drove on highway 17 through Scotts Valley. Cheers, Chuck