Daniel Aylen wrote: I have a problem with the picmaster ICE , my program for the 16C71 works 100% on the emulator but when I download it to the micro it does not work at all . It seems that the voltage levels are different when using the micro. Can someone give me any tips on what the problem could be? Thanks Cheers ************************** Daniel Aylen DNA@msi.imt.za ************************** I submitted this problem to our hardware engineering people and got this response: "My guess is that he is either not initializing properly, or he may not have the MCLR pin tied high... The emulator takes care of that, so he may have a problem on his board. These are the two most common problems when an emulator works, but the real part doesn't." Try these suggestions and let me know. I can help with the init code if that is where the problem is. Pete Brink, Senior Software Engineer, Microchip Technology. pbrink@ccmail.microchip.com