Transcript Starting Up Operating Systems

COSC1078 Introduction to
Information Technology
Lecture 16
Operating Systems
James Harland
[email protected]
Lecture 16: Operating Systems
Intro to IT
Introduction to IT
1-4 Introduction, Images, Audio, Video
5-6 Computer Fundamentals
Assignment 1, WebLearn Test 1
7 Review
8 Operating Systems
9 Operating Systems
WebLearn Test 2
Assignment 2
10 Internet
11 Internet Security
WebLearn Test 3
12 Future of IT
Assignment 3, Peer and Self Assessment
Lecture 16: Operating Systems
Intro to IT
Overview
 Questions?
 Assignment 2
 WebTest 2
 Operating Systems
 Questions?
Lecture 16: Operating Systems
Intro to IT
Assignment 2
 Now in the Learning Hub
 Assumes you are using Audacity
 If not, please see me asap
 Seems a lot, but shouldn’t be too hard once you have
Audacity and your files
 CD task requires CD reading software
Windows: ImgBurn www.imgburn.com
Mac: Burn, Toast
Linux: ImgBurn via Wine, or K3B, Brasero, Nero, …
Lecture 16: Operating Systems
Intro to IT
WebTest 2
 Now open
 Based on Computer Fundamentals material
 Some questions slightly different to what we have
covered
Lecture 16: Operating Systems
Intro to IT
Where to begin?
How do you start an operating system?
Boot it! (or bootstrap)
 Turn on power ()
 Machine loads bootstrap program from
ROM (non-volatile memory)
 Bootstrap program loads OS
 OS takes over
Lecture 16: Operating Systems
Intro to IT
Initial State When Turned On
Processor
00
Program
Counter
Memory
00 Bootstrap
Disk
ROM
Program
RAM
Instruction
Register
Lecture 16: Operating Systems
Intro to IT
Load Bootstrap Program
Processor
00
Program
Counter
Memory
00 Bootstrap
Disk
ROM
Program
RAM
Instruction
Register
Lecture 16: Operating Systems
Intro to IT
Bootstrap program loads OS
Processor
00
Program
Counter
Memory
00 Bootstrap
Disk
ROM
Program
RAM
Instruction
Register
Lecture 16: Operating Systems
Intro to IT
Bootstrap program loads OS
Processor
00
Program
Counter
Memory
00 Bootstrap
Disk
ROM
Program
RAM
Instruction
Register
Lecture 16: Operating Systems
Intro to IT
Bootstrap program has loaded OS
Processor
AA
Memory
Disk
00 Bootstrap
ROM
AA
RAM
Program
Program
Counter
Instruction
Register
Lecture 16: Operating Systems
Intro to IT
OS takes over execution
Processor
AA
Memory
Disk
00 Bootstrap
ROM
AA
RAM
Program
Program
Counter
Instruction
Register
Lecture 16: Operating Systems
Intro to IT
Starting Up Operating Systems
Processor
AA
Memory
Disk
00 Bootstrap
ROM
AA
RAM
Program
Program
Counter
Instruction
Register
Lecture 16: Operating Systems
Intro to IT
Starting Up Operating Systems
Processor
AA
Memory
Disk
00 Bootstrap
ROM
AA
RAM
Program
Program
Counter
Instruction
Register
Lecture 16: Operating Systems
Intro to IT
Starting Up Operating Systems
Processor
AA
Memory
Disk
00 Bootstrap
ROM
AA
RAM
Program
Program
Counter
Instruction
Register
Lecture 16: Operating Systems
Intro to IT
Multiple boot scenario …
Processor
00
Program
Counter
Memory
00 Bootstrap
Disk
ROM
Program
RAM
Instruction
Register
Lecture 16: Operating Systems
Intro to IT
Multiple boot scenario …
Processor
00
Program
Counter
Memory
00 Bootstrap
Disk
ROM
Program
RAM
Instruction
Register
Lecture 16: Operating Systems
Intro to IT
Multiple boot scenario …
Processor
00
Program
Counter
Memory
00 Bootstrap
Disk
ROM
Program
RAM
Instruction
Register
Lecture 16: Operating Systems
Intro to IT
Multiple boot scenario …
Processor
00
Program
Counter
Memory
00 Bootstrap
Disk
ROM
Program
RAM
Instruction
Register
Lecture 16: Operating Systems
Intro to IT
Processes
Lecture 16: Operating Systems
Intro to IT
OS Software Classification
Software
Application
System
Utility
Operating System
Shell
Lecture 16: Operating Systems
Intro to IT
Kernel
Conclusion
 Work on Assignment 2
 Web Quizzes and Web Test 2
 Finish reading book!
Lecture 15: Operating Systems
Intro to IT