On Thu, Jun 28, 2012 at 12:12 PM, Rick Hodgin <foxmuldrster at yahoo.com> wrote: > For one thing, we can physically examine the 2800 transistors in the original Intel 4004 to see that there is no secret key. ?As for the 29K transistors in the 8086 ... I believe the same thing. http://visual6502.org/ is perhaps the best known of this sort of exercise. --tim