Hello, I have just completed reading C. Petzhold's "Code. The hidden language of computer hardware and software" (I think I need not tell you how great this book is). There is, however, something I do not grasp. The author explains how to build a set/reset counter based on a collection of D-type edge triggered flip-flops, and still I fail to understand how to set/reset this counter's lowest output bit (which is crucial to branching). Please, would you be kind enough as to point out my mistake, or perhaps, suggest a source for an alternative solution? Thank you very much for your time. A. Student P.S. And one more question, in case you kindly decide to put up with me. Does the clock signal have to be disconnected for this counter to be reset?