Dear PICsters, Please forgive my ignorance, but I have been tearing my hair out over the PIC17C766 header sheet. I am trying to flash a LED with a PIC17C766 just to ensure system integrity before moving onto more interesting things. I have come unstuck though with the PIC17C766 header which does not seem to work. Has anyone ever used one of these devices or knows what might be going on. I always thought that the header file could be copied and used as the register map etc for the variable declarations. Is this so? John Orhan Detection Systems / EDM Engineering Department Ph: 02 96721233 (ext 219) Fx: 02 9672 4093 Email: jorhan@edm.com.au