On Wed, 13 Aug 1997 21:00:52 -0400, Allison wrote: %<From: Phil Sutherland &lt;philsuth(a)mycroft.DIALix.oz.au&gt; %<I recently tracked down the articles on the EDUC-8 as the first step %<towards building one. My plan to put it in the corner of my office as an %<"executive toy". However, by the time I get round to it I suspect I'll %<be using it as an educational toy for my (currently 1 year old) son! % %On the build it yourself tack I've considered building my own TTL pdp-8 but %every time I put the paper down I end up with 16 bits. The basic 16bit %design was PDP-8 with four more address bits. There is or was a prentice hall book on logic design that described the design of a PDP-8 workalike. I bought the book and told myself that one day, I'll build a PDP-8 with EPLDs. Like Allison, I ended up with 16 bits and then other things got in the way... The book is called top-down logic design or something like that. Ben