I understand computers store memory in bits/bytes through the use of circuits and switches, and the computer reads it through machine code a.k.a. "binary". But I still don't understand how the computer knows what to put on the screen? So it sees a bunch of switches that are on and off.. How is the computer able to know that 01000001 means "A" and how does it display that on the screen, or even know what point to put it on the screen. I know the screen is like a grid, but I just don't understand.
I've tried researching the topic and I've found vast amount of explanations about how the microprocessor works and how memory is stored, but not what I'm looking for.