Just in case...
You can't or don't want to build your own Apollo Guidance Computer,
you can always play this simplified lunar landing simulation here, courtesy
of Kipp Teague's Contact Light/Project Apollo Archive Web site here:
http://www.retroweb.com/lander.html
Phil, I have seen Digital Apollo on the bookshelves but was not certain
how interesting or digestible it really would be. I will now take a better
gander at it, thanks.