6COMMUNICATIONS BREAKDOWN

Image

Computers don’t compute just for the thrill of it. They take in input from various sources, do their computations, and produce output for use by a huge range of devices. Computers might be communicating with people, talking to each other, or running factories. Let’s explore this a bit more.

I briefly mentioned input and output (I/O) in “Input and Output” on page 96, referring to getting things into and out of the processor core. Doing that isn’t all that difficult; all we need are some latches (see “Latches” on page 71) for output and tri-state buffers (refer to Figure 2-38) for input. It used to be that each and every ...

Get The Secret Life of Programs now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.