Code: The Hidden Language of Computer Hardware and Software
Ratings36
Average rating4.3
15
Ratings36
Average rating4.3
Computers are everywhere, most obviously in our laptops and smartphones, but also our cars, televisions, microwave ovens, alarm clocks, robot vacuum cleaners, and other smart appliances. Have you ever wondered what goes on inside these devices to make our lives easier but occasionally more infuriating?
For more than 20 years, readers have delighted in Charles Petzold's illuminating story of the secret inner life of computers, and now he has revised it for this new age of computing. Cleverly illustrated and easy to understand, this is the book that cracks the mystery. You'll discover what flashlights, black cats, seesaws, and the ride of Paul Revere can teach you about computing, and how human ingenuity and our compulsion to communicate have shaped every electronic device we use.
This new expanded edition explores more deeply the bit-by-bit and gate-by-gate construction of the heart of every smart device, the central processing unit that combines the simplest of basic operations to perform the most complex of feats. Petzold's companion website, CodeHiddenLanguage.com, uses animated graphics of key circuits in the book to make computers even easier to comprehend.
Reviews with the most likes.
This is a wonderful book. It claims it wants the reader to understand computers the way computer engineers do. And, if you read carefully, follow the diagrams and think through the explanations,
you will start to. He shows how the main components can be built out of the clever use of a few ordinary bits of technology, all over a hundred years old. I started programming computers about 40 years ago and have a Ph.D in computer science, so I mostly already knew everything in here. But I had the most fun I have had in years reading the first half or so. One of my first programming classes in college involved learning exactly this material. Using little bits of code to simulate relays, switches and such, we built logic gates, then used that code to build 1/2 adders, adders and other components. It was the same sequence of ideas and techniques presented here. We wrote the code in assembler, I think for the PDP-11, or maybe it was in the Mix language used in the Knuth books. This class was my favorite of all my programming classes and reading this book took me back there.
Now I am inspired to do it again, using the circuits described in this book to build a simulation for the web.
So now you think this book is for highly trained engineers and it absolutely isn't. The background you need is you have to understand that switches go on and off, and if you hook a light bulb to a battery, it will light up. The author carefully and fully explains the rest. After getting through this you will know why computers use binary arithmetic, how Braille and Morse code are related, what mathematical logic is. Every day you use that amazing phone or desktop computer to make and play video and music, talk to people anywhere in the world, find out anything you want to know. Read this book and you will know it's not magic, it's the very clever use of a few very simple tools.
This book would be great for a high school student who is interested in science, math or technology and for anybody who wants to know how computers really work, not just what app does what. This was easily my favorite book I read this year.
An excellent, approachable work suited for anyone interested in computers, demanding no need for technical background. As an individual with large amounts of experience in several of the topics presented within, I still found this work enjoyable and it filled in some gaps in the entire stack of the computer. While the later chapters show the age of the text, the combined historical summary of events and technical deep dive into operation was highly enjoyable.
This book is quite incredible. You start with braille and simple light switches, make your way to oscillators, flip-flops and multiplexer, and suddenly you understand how computer hardware works. And that's coming from someone who already thought they “sorta” understood how it worked. I didn't really. Now I do. Best bottom-up education ever.
