If you name them 0-F then D-F are empty. Not a single page is entirely used though. Some pages are almost entirely empty. And if I remember well, page 8 is the same as page 0 except for the first byte. On Thu, 2002-10-03 at 18:57, Pieter Van Nuffel [aka SUCKER] wrote: > > The Ti-83- rom is 256 KB large, but about how much is actually used? And > what about the other TI calcs?