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Computer Organization & Architecture

Foundations of Computing7

Instruction Set Architecture5

Datapath & Control Unit4

Instruction Pipelining4

Memory Hierarchy7

Why can't we just build one giant, fast memory?
How cache actually works: blocks, tags and the address split
What happens when you write to cache, and what gets evicted?
Main memory: how RAM stores a bit as a leaking bucket of charge
Memory interleaving, and the read-only memory your computer boots from
Secondary storage: why your files survive being turned off
Virtual memory: giving every program its own private, pretend address space

I/O Interfaces & Interrupts5

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

Why can't we just build one giant, fast memory?
How cache actually works: blocks, tags and the address split
What happens when you write to cache, and what gets evicted?
Main memory: how RAM stores a bit as a leaking bucket of charge
Memory interleaving, and the read-only memory your computer boots from
Secondary storage: why your files survive being turned off
Virtual memory: giving every program its own private, pretend address space

I/O Interfaces & Interrupts5

Boot to Execution: The Full System Trace5

Learn Computer Organization & Architecture Memory Hierarchy

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What happens when you write to cache, and what gets evicted?

Reading from cache is only half the story. Writing raises a whole new question - when does main memory find out? - and a full cache needs a rule for deciding what to throw away.

10 min readUpdated 2026-09-03computer-architecturecachereplacement-policy