Digital Logic And Computer Design -

— In service of the NAND gate, from which all blessings flow.

Eventually, you need to orchestrate all these pieces. You need a (registers + ALU) and a controller (a finite state machine). The controller reads instructions from memory, decodes them, and tells the ALU what to do.

This loop—Fetch → Decode → Execute—is the heartbeat of every computer you’ve ever used. Your phone, your laptop, the server running ChatGPT, the ECU in your car. They all do this. Billions of times per second. Without exception. digital logic and computer design

That reality is .

This is the : memory stores both data and instructions. The CPU fetches an instruction, decodes it, executes it, and stores the result. Then it repeats. Forever. — In service of the NAND gate, from

A wire is either at 0 volts or 5 volts (or 3.3V, or 1.8V these days). That’s it. The universe of computation begins with this binary act:

When you see x + y in your code, you are looking at a ripple of electrons through a cascade of logic gates. That is not an abstraction. That is poetry. The controller reads instructions from memory, decodes them,

The deep tragedy is the : the path between CPU and memory is narrow and slow. Your CPU can add two numbers in 1 cycle, but fetching those numbers from RAM might take 300 cycles. Most of modern computer architecture—caches, branch prediction, out-of-order execution—is just a desperate attempt to hide this one physical constraint.