Hi all, thanks for the programming specifications info. If I intend to design a programmer of the ludipipo class, do you think I will qualify as a programmer manufacturer? ;-) I know, I'd better ask Scenix... Another question is how much does Parallax ask for those chips. I checked with Czech distributor, and they want to charge something like $12 for singles and $6 for hundred units. Unfortunately my browser crashes at some fancy Parallax scripts or what, so I cannot check myself. Thanks so far. Josef