---
title: "bus"
aliases: 
tags: 
- cosc204
---


- data bus
- address bus
- control bus

- conmmunicate between parts of the computer
- only one transmitter at a time
- only addressed device can respond
- 2 levels
	- internal
	- external

- memory size is dependent on bus size
	- 2n bytes for n-lines on the address bus
		- 2^8=256B, 2^16=64KB, 2^32=4GB, 2^64=16EB