Andy writes: ============ >I connected an '84 with power reversed (well actually I put it into its >socket upside-down), and when I put it the right way round it worked >perfectly. I am a firm believer in the robustness of PICs after this and >other stories I have read on the PICLIST. Robin replies: ============== Sorry I should have said it was a reversed 12V supply which blew the 7805 on the board and applied a reverse 12V to the PIC, which then refused to do anything, the 24LC65 EEPROM worked fine though... In the past I have reversed supply to a '58 (the /JW unfortunately), this actually blew an EPROM location to all 0's resulting in a verification error on the programmer. I erased it, reprogrammed it successfully, used it OK, but then discovered that A0 and A1 stuck at driving 2.5V, the rest of it seemed to work though. Robin,