> I'm about to start on a PIC17C752-based project with external ROM and RAM > (table read/write). I appreciate that this is an odd question to ask on a PIC list, but why did you opt for that part if you need to go to external memory ? An expanded 17C part seems to me to be all economically wrong with the port pins you loose, twice as many chips for external memory and just the two instructions for getting at program code space. I would expect that updating a flash with it would become quite a task (compared to more mainstream micros). I don't have any problem with people sticking to an architecture they are familiar with. If that's the reason, that's fine. If this part was chosen from a choice of many, I'd be interested in why. Steve. ====================================================== Very funny Scotty. Now beam down my clothes. ====================================================== Steve Baldwin Electronic Product Design TLA Microsystems Ltd Microcontroller Specialists PO Box 15-680, New Lynn http://www.tla.co.nz Auckland, New Zealand ph +64 9 820-2221 email: steveb@kcbbs.gen.nz fax +64 9 820-1929 ======================================================