Hi all, This time around with the right tag ( Might actually get me an answer ) I bought some 18f4539 chips with built in motor controller kernel before really reading all of the data sheet and now have some problems. I have no idea how to call the prompt functions in C. I am using sourceboost IDE BoostC compiler. I just cant find all relevant info I suppose I need entry addresses of all functions but I just cannot find this info. I checked all files in their app notes for any clues. Does anyone have any experience with this? A second question: The data sheet mentions that though registers for the 2 PWM modules are described they can only be used by the motor control kernel. Is this true even if the kernel is never called or initialized? Thanks in advance for any info Peter van Hoof -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist