"Tony Vandiver" wrote: > Cool, I'll give it a try. My bad assumption seems to be that there > "must" be an erase to the page to write a single location. As long as > what's currently there is all ones, new data can be written without an > erase - very interesting. Right. The algorithm seems to be well thought out. You write starting from the top of the page, read starting from the bottom. Once the page is filled up, a new page is made active, and data from the previous page is packed into it. Once all pages are full, the first page in the series is erased, and the process is repeated. Vitaliy -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist