At the most fundamental level, modern digital computers do not understand numbers, letters, or images; they understand only electrical voltage levels, abstractly represented as binary
This essay explores the remarkable journey up this abstraction stack, detailing how logic gates form circuits, how circuits build processors, how processors execute instructions, and how compilers bridge the gap between human thought and machine action. 1. The Bedrock: Logic Gates and Boolean Algebra At the most fundamental level, modern digital computers
Rearranges the code to make it run faster and use less memory. Logic gates are the philosophers of the hardware world
Logic gates are the philosophers of the hardware world. They ask fundamental questions: Is this signal high? Is that signal low? Are both inputs active? Are both inputs active
A processor (CPU) integrates billions of the above circuits into a coordinated unit. The core components include:
A compiler is a special program that translates source code (written in a high-level language like C, C++, or Rust) into machine code (the binary instructions a processor understands). This process involves several phases:
ADDI r1, r0, 5 ; Load 5 into register 1 ADDI r2, r0, 3 ; Load 3 into register 2 ADD r3, r1, r2 ; r3 = r1 + r2
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