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Computer Organization & Architecture

Foundations of Computing7

Instruction Set Architecture5

The fetch-decode-execute cycle - how a CPU actually runs a program
What does an instruction actually look like in memory?
The three jobs every instruction set needs to do
Addressing modes: how an instruction says where its data actually is
Registers, the register file, and what an ISA actually promises

Datapath & Control Unit4

Instruction Pipelining4

Memory Hierarchy7

I/O Interfaces & Interrupts5

Boot to Execution: The Full System Trace5

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Computer Organization & Architecture

Foundations of Computing7

Instruction Set Architecture5

The fetch-decode-execute cycle - how a CPU actually runs a program
What does an instruction actually look like in memory?
The three jobs every instruction set needs to do
Addressing modes: how an instruction says where its data actually is
Registers, the register file, and what an ISA actually promises

Datapath & Control Unit4

Instruction Pipelining4

Memory Hierarchy7

I/O Interfaces & Interrupts5

Boot to Execution: The Full System Trace5

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The three jobs every instruction set needs to do

Every instruction, in every CPU ever built, falls into one of three families - move data, compute on it, or change what happens next. Here's why that's the whole story.

9 min readUpdated 2026-09-03computer-architectureinstruction-set-architectureinstruction-types