More info on the project at :
 
http://www.hp9845.net/9845/projects/romboard/
 If you're interested let me know off-list 
    Rik, may I suggest some mods on this project?
    - why not SMD chips?
    - The board can be made WAY smaller (and cheaper)!!!
    - If you use only one socket and 8 wires to the cs2 socket, you could
make it EVEN smaller!
    - There are 16 bit memories on the market for cheap. Even SMD ones. Why
not?
    I think there is an easier way of doing that board :)