cosc1078 introduction to information technology lecture 15 booting
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COSC1078 Introduction to Information Technology Lecture 15 Booting. James Harland [email protected]. Introduction. James Harland Email: [email protected] URL: www.cs.rmit.edu.au/~jah Phone: 9925 2045 Office: 14.10.1 Consultation: Mon 4.30-5.30, Thu 11.30-12.30 - PowerPoint PPT PresentationTRANSCRIPT
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Lecture 15: BootingIntro to IT COSC1078 Introduction to Information Technology Lecture 15
BootingJames [email protected]
1Lecture 15: BootingIntro to IT Introduction
James HarlandEmail: [email protected]: www.cs.rmit.edu.au/~jahPhone: 9925 2045Office: 14.10.1 Consultation: Mon 4.30-5.30, Thu 11.30-12.30What colour is my office door? Carpet? Chair?
2Lecture 15: BootingIntro to IT Introduction to IT
1 Introduction 2 Images3 Audio4 Video WebLearnTest 1 5 Binary Representation Assignment 16 Data Storage7 Machine Processing8 Operating Systems WebLearn Test 29 Processes Assignment 210 Internet11 Internet Security WebLearn Test 312 Future of ITAssignment 3, Peer and Self Assessment3Lecture 15: BootingIntro to IT OverviewQuestions?
Assignments 1 & 2
Booting
Questions?
4Lecture 15: BootingIntro 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
5Lecture 15: BootingIntro to IT Initial State When Turned OnProgram CounterInstructionRegister00ROMRAMProcessorMemoryDiskBootstrapProgram
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6Lecture 15: BootingIntro to IT Load Bootstrap ProgramProgram CounterInstructionRegister00ROMRAMProcessorMemoryDiskBootstrapProgram
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7Lecture 15: BootingIntro to IT Bootstrap program loads OS Program CounterInstructionRegister00ROMRAMProcessorMemoryDiskBootstrapProgram
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8Lecture 15: BootingIntro to IT Bootstrap program loads OSProgram CounterInstructionRegister00ROMRAMProcessorMemoryDiskBootstrapProgram
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9Lecture 15: BootingIntro to IT Bootstrap program has loaded OSProgram CounterInstructionRegisterAAROMRAMProcessorMemoryDiskBootstrapProgram
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AA10Lecture 15: BootingIntro to IT OS takes over executionProgram CounterInstructionRegisterAAROMRAMProcessorMemoryDiskBootstrapProgram00
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11Lecture 15: BootingIntro to IT Starting Up Operating SystemsProgram CounterInstructionRegisterAAROMRAMProcessorMemoryDiskBootstrapProgram00
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12Lecture 15: BootingIntro to IT Starting Up Operating SystemsProgram CounterInstructionRegisterAAROMRAMProcessorMemoryDiskBootstrapProgram00
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13Lecture 15: BootingIntro to IT Starting Up Operating SystemsProgram CounterInstructionRegisterAAROMRAMProcessorMemoryDiskBootstrapProgram00
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14Lecture 15: BootingIntro to IT Multiple boot scenario Program CounterInstructionRegister00ROMRAMProcessorMemoryDiskBootstrapProgram00
15Lecture 15: BootingIntro to IT Multiple boot scenario Program CounterInstructionRegister00ROMRAMProcessorMemoryDiskBootstrapProgram00
16Lecture 15: BootingIntro to IT Multiple boot scenario Program CounterInstructionRegister00ROMRAMProcessorMemoryDiskBootstrapProgram00
17Lecture 15: BootingIntro to IT Multiple boot scenario Program CounterInstructionRegister00ROMRAMProcessorMemoryDiskBootstrapProgram00
18Lecture 15: BootingIntro to IT OS Software ClassificationSoftwareSystemApplicationUtilityKernelOperating SystemShell
19Lecture 15: BootingIntro to IT Processes
20Lecture 15: BootingIntro to IT ProcessesA program is a static set of instructions
A processes is the execution of a program, which changes state over time.
21Lecture 15: BootingIntro to IT Processes Executing in ContextProgram CounterInstructionRegisterCCROMRAMProcessorMemoryDisk00
CC
22Lecture 15: BootingIntro to IT Processes Executing in ContextProgram CounterInstructionRegisterDDROMRAMProcessorMemoryDisk00
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DD23Lecture 15: BootingIntro to IT Processes Switching
ReadyReadyWaitingScheduler maintains process table
24Lecture 15: BootingIntro to IT Processes Switching
25Lecture 15: BootingIntro to IT Interrupts
Signals to the CPU Often generated by timing circuits CPU reacts by jumping to appropriate memory location Dispatcher selects a ready process resets timing circuit starts process CPUs often designed to switch process states efficiently 26Lecture 15: BootingIntro to IT Processes Executing in ContextProgram CounterInstructionRegisterBBROMRAMProcessorMemoryDisk00
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27Lecture 15: BootingIntro to IT Processes Executing in ContextProgram CounterInstructionRegister11
ROMRAMProcessorMemoryDisk00
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28Lecture 15: BootingIntro to IT Processes Executing in ContextProgram CounterInstructionRegisterFFROMRAMProcessorMemoryDisk00
FF
29Lecture 15: BootingIntro to IT Interrupts
Provide mechanism to switch processes
CPU doesnt have to wait for I/O transfers
Switching leads to faster throughput
`Save document means CPU does something else while the save takes place
30Lecture 15: BootingIntro to IT ConclusionAssignment 2 specified sometime this week
Finish reading book!
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