> > if I buy a 16F84, I am stuck with only 1K of eeprom program memory, > > is there a way to reroute the port for data/adress bus? > > No. If you want an external address/data bus, you'll need to > use one of the PIC17 family. You mean I'll have to buy a bigger romable code chip ? or you mean there's a chip that you can hook up with the pic that does the job, or what? :) I used to do ram expansion when needed with 68hc11 but the pic doesn't work the same way and I don't know how to adress pass 3ff with external memory, for example -- ----------------------------------------------- Eric Slight E-mail: eslight@matrox.com DigiSuite SQA Specialist. Video Production Group, Matrox Electronics Inc. Dorval, Quebec (Canada). -----------------------------------------------