I had already made a video on how to access a current time and date source from my RTC module for the Commodore 64.
Here I am demonstrating how to access the 4kB memory expansion embedded in the above mentioned RTC module.
The demo application actually also writes to the EEPROM, which is how the 2 messages shown in the video were written to it!
Possible applications? Store there your favourite hi-score tables 🙂