Thanks for the comments! A few comments in response. I'm becoming a big fan of wikis. With a wiki, with lots of people contributing, the tutorial could always be up to date since it would be continously edited instead of being written once, then posted on the web to rot for years. Second, with multiple authors, you don't get one author's perspective, complete with weak points. Each contributor can fill in with his/her strong points. It seems that contributors could vastly expand on the wiki at http://en.wikipedia.org/wiki/PIC_microcontroller . Pages could be added describing the processor core and the various peripherals on the chip. By the way, my start at playing with a wiki is at http://www.hallikainen.org/BroadcastHistory . Harold -- FCC Rules Updated Daily at http://www.hallikainen.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist