Need help identifying Rockwell chip

[JoeG]

I took apart a Atari game cartridge for Atari 8 bit computers (Jungle Hunt) to see how it was built with the intention of making my own cartridges using PCB's from PCBWAY and Atari BIN files (if I can find any!).

In the attached photo, the chip on the left is the Rockwell chip in question. I can't find any information on the internet about the chip. I'd like to know what it is and what it does.

Does anyone happen to know?

   

Thank you!

Joe