Dragonator, We have a coded cartridge that will only read in certain printers, and those printers require this particular coded cartridge, and will not read non-coded carts. Apparently certain pins have been "burned out" to accomplish this coding. How would you go about finding which pins have been "burned out"?
Would it be the Address pins that are burned out to code it, or possibly the grounds?
I have heard hints of stuff like this happening before, but I have never seen it personally. My quess would be to measure resistance in the "wrong" direction, ie positive lead on ground, and negative leads on addresses and primitives. I have noticed that resistance is based on polarity.