How I/O devices are connected to a CPU's memory address space.
Course web site: http://faculty.cs.niu.edu/~winans/CS463
A model 15 teletype running: https://youtu.be/ug5lUI-hs3s
Music used in this video (Vibe Tracks, Alternate) was downloaded from the YouTube Audio Library: https://www.youtube.com/audiolibrary_download?vid=16533edffc7d47f9