Boris Ivanovic - Finally got the keypad presses to make the menu advance to one of two screens, depending on which button the user pressed. Although, this seems like a hack as it only uses PORTB's 4th bit, meaning it is literally a binary choice. All elements in a column have the exact same bit value and this is definitely a problem...
I'll need to see how to properly use the MM74C922N encoder!!
Also, this is the last commit of the night, total working time seems to be 4:45pm to 1:20am (8 hours, 35 minutes)