I recently picked up an interesting book, entitled "The Logic Desgign of Computers: An Introduction", by M. Paul Chinitz. Mr. Chinitz was Director of Training at Univac from 1953 to 1956, and it shows -- even though this book was published in 1981. Seriously, the design style in the book is straight out of the 50's and 60's. Although the book makes numerous references to standard TTL logic components, he does just about everything with simple gates and RS flip-flops, and devotes space to such dated topics (for a book of its scope) as 1's complement arithmetic, serial arithmetic, and delay lines. Proponents of a straightforward fully-synchronous design style based on MSI, like Winkel, Prosser, and Mano, would be horrified to see students taught to gate clocks in 1981. The book uses a simple 8-bit 1-address architecture as an example, using a multiphase clocking scheme and RS flip-flops with preclear. All a wonderful throwback to the days when every gate and transistor counted. I picked up a copy at a swap meet, misplaced it, ordered another from an internet used bookseller, and then found my original copy. I thus now have an extra copy of this book. It is available for $5 plus shipping if anyone is interested. --Bill