In this folder you can find a program for Atari 2600 that communicates with RTC circuit.
It is at experimental stage. It reads a current time from the circuit and displays it as a score, but there is no way to set the clock.
I designed this adapter primarily for my game - Berta and Butterflies. I wanted to make the game more similiar to the "Game & Watch" LCD game and display current time at title screen. It's a gadget, not a must have feature, but I'm determined to do it eventually.