Hi Joe, On Wed, 21 Dec 2011 22:50:14 +1300 IVP wrote: > >(b) the card - well, sector 0 can be read, and no error is returned >when requesting sector 0x2000. But maybe the internal controller >isn't requesting 0x2000. Perhaps for some reason it's ignoring the >address I send it and somehow auto-incrementing, fetching sector 1, >which will be empty You can use a binary sector editor to check the actual contents of these sectors (0x2000, and perhaps 0x0001) and even put some unique string contents in there just to be able to recognize them in testing ... Regards, JvW Jan van Wijk, author of DFSee; http://www.dfsee.com ---------------------------------------------------------------------------= ---- --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .