Thanks for a viewer who let us know that using the C= + I keys allow the user to select which input device you want to use to interface with GEOS. No, I didn't read the read me file, so that was my bad; however, I'm sure there might be one or two others like me that struggled with this, so I made this short video. I can say that I learned something new today. Enjoy! **SUBSCRIBE for more C64U videos! http://www.youtube.com/@heywhatisnext **#commodore64 #c64 #update #firmwareupdate #mouse **Amazon Affiliate Store (may earn commission): https://www.amazon.com/shop/heywhatsnext**