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Computer Organization & Architecture

Foundations of Computing7

Instruction Set Architecture5

Datapath & Control Unit4

Instruction Pipelining4

Memory Hierarchy7

I/O Interfaces & Interrupts5

How does the CPU even talk to a keyboard or a screen?
Interrupts: letting the device tap the CPU on the shoulder
What happens when two devices interrupt at the exact same time?
DMA: letting devices copy data without bothering the CPU at all
Polling vs interrupts vs DMA - choosing the right tool

Boot to Execution: The Full System Trace5

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Computer Organization & Architecture

Foundations of Computing7

Instruction Set Architecture5

Datapath & Control Unit4

Instruction Pipelining4

Memory Hierarchy7

I/O Interfaces & Interrupts5

How does the CPU even talk to a keyboard or a screen?
Interrupts: letting the device tap the CPU on the shoulder
What happens when two devices interrupt at the exact same time?
DMA: letting devices copy data without bothering the CPU at all
Polling vs interrupts vs DMA - choosing the right tool

Boot to Execution: The Full System Trace5

Learn Computer Organization & Architecture I/O Interfaces & Interrupts

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Interrupts: letting the device tap the CPU on the shoulder

Instead of the CPU constantly asking "are you ready yet?", what if the device could just interrupt whatever the CPU is doing the moment it actually has something? That's an interrupt.

12 min readUpdated 2026-09-03computer-architectureinterruptsio