I'm working on an odd project involving the 5200 controller. I was curious if anyone out there has both a 5200 controller and an Atari 2600 Star Raiders keypad handy for size comparison? I'm hoping the two have identical or near identical keys and arrangement. Here are picts of each.



My guess is the Atari 2600 Star Raiders controller is using a non-matrix keypad. The 5200 uses the matrix kind, so it functions independent of a common ground, thus making it impossible for this to work for me or, at least, impossible for me to figure out.
If any of you are interested in the history, here is a thread from the Ben Heck forum. (FYI, the solution I thought I had in the last post totally did not work.)
http://benheck.com/forums/viewtopic.php?p=326917
Please give a shout if you can help.
Thanks!