Hi Folks, I did the programmer modified by Pavel Kustarev found on David Tait's site.The software I'm using is PP12.EXE as I'd like to program 12C5XX serie. When I'm initialising the port, all seems ok but when I'm executing the pp12 with all attributes, the system gives me the message "PP: HEX DIGIT EXPECTED" and it's over. Could somebody help me.?? thanks Fabrizio