Here is a good starting point.
http://www.jeffrey.henning.com/lnk/drktwr.htm
snip from the site.... (something of a start on a emulator)
Dark Tower Links
One of my favorite games of all time is Dark Tower, by Milton Bradley. This
was the first electronic board game and was released in 1981, when I was
but a lad of 13. I played it constantly and thought it was even better than
Dungeons & Dragons. It is a well-designed multiplayer game with an
innovative interface. You can get a complete description here, or you can
get a short overview of the rules.