I've been trying to learn to use PIC microcontrollers for a while now, but I've stuck to using a PIC18F4550/2550 and a dsPIC30F4011. I'm curious, are all PIC devices within the same "family," such as PIC18F or dsPIC30F, the same as far as the way they are programmed (memory organization, instruction set, register and port names, etc..), with the only difference being the peripheral set? Thanks for satisfying my curiosity! -Nathan --=20 Student Hobbyist --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .