I understand that Microchip has written the serial number of the chip into EEPROM for 18Fxxxx chips and that it can be read by PBP code. Can anyone tell me where in the chip memory map of a 18F4550 the serial no. is located and how to use PBP code to read it? I would like to use this as a method of uniquely identifying the location/ID of each embedded processor application that contains one of these chips.