Allison sent me the scans of the appnotes for the data separator / floppy interface circuits, and I have put them on the web for anyone who wants access to them. http://www.30below.com/~zmerch/classics/datasep/ 4 files, monochrome JPG, enter at your own risk, and I'm not to be held responsible if your dog's hair turns blue because of it. ;-) Laterz, Roger "Merch" Merchberger -- Roger "Merch" Merchberger -- SysAdmin, Iceberg Computers _??_ zmerch at 30below.com (?||?) If at first you don't succeed, nuclear warhead _)(_ disarmament should *not* be your first career choice.