---
title: "computer-architecture"
aliases: 
tags: 
- cosc204
---

# Stored program computer
![](https://i.imgur.com/wxSfxiO.png)

made up of:
- [CPU](notes/CPU.md)
- [memory](notes/memory.md)
- etc

# Von Neumann Architecture
- three key concepts
	- data and instructions are stored in a single read-write memory
	- contents of memory are addressable by location, without regard to the type of data contained
	- execution occurs in a sequential fashion, unless explicitly altered, from one instuction to the next
- programs and data are the same thing
	- and so its possible to write soure code (data) and comile them into executables (programs) that can be loaded as data and then executed as programs

# Early computers
![motorola MC6809 CPU](https://i.imgur.com/yq74Ops.png)
![circuit diagram for 6809](https://i.imgur.com/41F0tnH.png)