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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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What happens when two devices interrupt at the exact same time?

Real computers have dozens of devices that can all demand attention. Here's how the CPU figures out which interrupt fired, and which one to service first when several arrive together.

10 min readUpdated 2026-09-03computer-architectureinterruptspriorityvectoring