Updated April 2026

100% Free Beginner to Advanced No Signup

Microprocessor A–Z

Master 8086, assembly, interrupts, and interfacing in 48 lessons

48Lessons
~10 minPer Lesson
$0Forever
12Topics
Start Lesson 1 — Free See Curriculum

What you'll learn

Foundations
Core Processor Model
8086 Architecture
Pins, Signals, and Modes
Addressing and Data Representation
Instruction Set Essentials
Control Flow and Structured Assembly
Assembly Programming Practice
Stack and Interrupts
Interfacing Fundamentals
Timers, DMA, and Serial Communication
Modern Bridge and Capstone

Full curriculum

48 lessons organized by topic. Click any lesson to jump straight in.

1. Foundations (4 lessons)

  1. 1What is a Microprocessor?
  2. 2Microprocessor vs Microcontroller
  3. 3Number Systems: Binary, Decimal, Hex
  4. 4Digital Logic Foundations

2. Core Processor Model (4 lessons)

  1. 5Fetch-Decode-Execute Cycle
  2. 6Registers, ALU, and Buses
  3. 7Clock, T-States, and Machine Cycles
  4. 8Memory, Addressing, and I/O Concepts

3. 8086 Architecture (4 lessons)

  1. 9Why the 8086 Matters
  2. 10BIU and EU: The Dual-Engine Design
  3. 118086 Register Set
  4. 12Segmented Memory and Physical Address

4. Pins, Signals, and Modes (4 lessons)

  1. 138086 Pins and Signals
  2. 14Minimum Mode vs Maximum Mode
  3. 15Bus Timing, Ready Signal, and Wait States
  4. 16Reset, HOLD, HLDA, and Basic Control Signals

5. Addressing and Data Representation (4 lessons)

  1. 178086 Addressing Modes
  2. 18Data Sizes, Endianness, and Alignment
  3. 19ASCII, BCD, Signed, and Unsigned Data
  4. 20Effective Address Calculation Practice

6. Instruction Set Essentials (4 lessons)

  1. 21Data Transfer Instructions
  2. 22Arithmetic Instructions
  3. 23Logical, Shift, and Rotate Instructions
  4. 24Flags Register and Condition Codes

7. Control Flow and Structured Assembly (4 lessons)

  1. 25Jumps, Loops, and Conditional Branching
  2. 26Procedures, CALL, RET, and Modular Thinking
  3. 27String Instructions and REP Prefix
  4. 28Assembler Directives, Labels, and Macros

8. Assembly Programming Practice (4 lessons)

  1. 29emu8086/MASM Setup and Syntax Basics
  2. 30Your First 8086 Program
  3. 31Arrays, Tables, and Block Operations
  4. 32Debugging Registers, Flags, and Memory

9. Stack and Interrupts (4 lessons)

  1. 33Stack, PUSH/POP, and Stack Frames
  2. 34Interrupt Basics and the Interrupt Vector Table
  3. 35Hardware vs Software Interrupts
  4. 36DOS/BIOS Interrupts for Console I/O

10. Interfacing Fundamentals (4 lessons)

  1. 37Memory Interfacing with RAM and ROM
  2. 38I/O-Mapped vs Memory-Mapped I/O
  3. 398255 Programmable Peripheral Interface
  4. 40Interfacing Keyboard, LEDs, and Seven-Segment Displays

11. Timers, DMA, and Serial Communication (4 lessons)

  1. 418253/8254 Timer and Counter Basics
  2. 428259 Programmable Interrupt Controller
  3. 438237 DMA Controller
  4. 448251 USART and Serial Communication Basics

12. Modern Bridge and Capstone (4 lessons)

  1. 45From 8086 to 80386, Pentium, and x86 Thinking
  2. 46Where 8051 and ARM Fit in the Big Picture
  3. 47Designing a Small Microprocessor-Based System
  4. 48Capstone: Trace, Explain, and Present a Full Interfaced System
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Frequently asked questions

Is this course really free?

Yes — 100% free. No signup, no credit card, no email required. All lessons, quizzes, and certificate of completion are free forever.

Do I need to install anything?

No. The entire course runs in your browser on phone, tablet, or laptop. No downloads, no accounts.

How long does the course take?

About 10 minutes per lesson. One lesson per day takes about 1-2 months total. Many learners finish in 2-3 weeks by doing multiple lessons per sitting.

Will I get a certificate?

Yes. After completing all lessons, generate a personalized certificate with your name and share it on LinkedIn. Not accredited, but signals commitment to recruiters.

Do I need prior experience?

No. Every course is designed for complete beginners. Each lesson starts with a plain-English analogy before any technical concepts.

How is this different from YouTube tutorials?

Three things: interactive — quizzes and hands-on challenges after every lesson; structured — a deliberate learning path, not random videos; gamified — XP, streaks, spaced repetition so knowledge actually sticks.