At my school, we like to play games on calculators, but sometimes kids play them during class. I am trying to create an access control system so we know who has the games, and they have to get them from one central location as opposed to transferring them amongst each other. For this purpose I am modifying Cesium by MateoConLechuga.
My problem is that I am trying to get some unique information from the calculator that does not change and is unchangeable, so when the items are transferred the information is unique to the old calculator and not the new one unless setup is run again. I was thinking of using the calculator's unique ID, but I don't know how to get it using ASM on a TI 84 + CE. If anyone knows how, please comment with an example code.

After some digging into the OS, I found that the _GetSerial jump table entry exists at 000340h. I've added this to the include file on WikiTI for future reference.

In case anyone's interested, here's the code I used to test it, which converts the first 5 bytes of the serial into a hexadecimal string in Ans:

Code:

Thanks for finding that equate when I didn't have the time to dig through the disassembly Mateo so kindly provided. I also like your technique for converting hex nibbles to ASCII without the need for conditional jumping on value.

KingInfinity: I'm frankly a bit skeptical that you're going to be able to enact some form of DRM scheme. Do you have details on the techniques you plan to use to restrict calculators from exchanging games?