The 3902 board was developed for SIMM software, so any software that is all EPROMS can work on a 3802. Older game kings, without the wing speakers, were probably originally all 3802's and will work with 3902's, but I'm guessing.
I got the kit, with a 3902 board, but the seller told me that it was originally on a 3802, which does not compute because there is no place for the sound EPROM. I guess there could be a sound board that mounts on a 3802 but I have no knowledge of it. Running the software without the sound chip works with some sounds but not the unique Wheel of Fortune sounds.
The seller also said that he never tried to keychip the game, works ok as is, but of course I want it to be as liberal as possible.
Some of the older software I have is 'flaky', won't keychip until after several tries. I'm hoping that if I keep trying, eventually it will
keychip. If not, it still works.
I believe that it is a highly collectable game, don't like to use the word 'rare', but they do not come up for sale very often, at least what
I think is the original game.