Operating Systems - David Vernon

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History of Operating Systems Fourth generation computers (1980-90) – Network operating systems » explicit access to multiple computers » explicit access to files on other computers – Distributed operating systems » appears to the user as a single machine operating system » even though it is running on many machines » the problems of coordination amongst the differents computers is hidden Copyright © 2007 David Vernon (www.vernon.eu)
Operating System Concepts System calls – ‘extended instructions’ provided by the OS – to hide the bare machine and provide an interface between user programs and OS Copyright © 2007 David Vernon (www.vernon.eu)
Page 1 and 2: Operating Systems David Vernon Copy
Page 3 and 4: Course Content Historical overview
Page 5 and 6: Course Content Device management -
Page 7 and 8: Course Content Networking issues -
Page 9 and 10: Course Textbook “Modern Operating
Page 11 and 12: Assessment of Performance First exa
Page 13 and 14: The Need for Operating Systems Why
Page 15 and 16: The Need for Operating Systems Comp
Page 23 and 24: The Need for Operating Systems Exam
Page 25 and 26: Load B DR ← M(AR) A B C 11111111
Page 27 and 28: Load B Increment PC A B C 11111111
Page 29 and 30: Load B AR ← DR(address) A B C 111
Page 31 and 32: Load B AC ← DR A B 11111111 01001
Page 33 and 34: The Need for Operating Systems Mach
Page 37 and 38: What is an Operating System There a
Page 39 and 40: What is an Operating System OS as a
Page 41 and 42: History of Operating Systems First
Page 43 and 44: History of Operating Systems Second
Page 45 and 46: History of Operating Systems Third
Page 47 and 48: History of Operating Systems Third
Page 49: History of Operating Systems Fourth
Page 53 and 54: Operating System Concepts Processes
Page 59 and 60: Operating System Concepts Files - O
Page 61 and 62: Operating System Concepts Copyright
Page 63 and 64: Operating System Concepts Files -Pr
Page 65 and 66: Operating System Concepts Files - O
Page 67 and 68: Operating System Concepts System Ca
Page 69 and 70: Operating System Concepts The Shell
Page 71 and 72: Operating System Structure Monolith
Page 73 and 74: Operating System Structure Monolith
Page 75 and 76: Operating System Structure Virtual
Page 77 and 78: Operating System Structure Virtual
Page 79 and 80: Operating System Structure Client-S
Page 81 and 82: Operating System Structure Client-S
Page 83 and 84: Processes All modern computer syste
Page 85 and 86: Processes Single program counter Fo
Page 87 and 88: Processes Because the OS schedules
Page 89 and 90: Processes Process Hierarchies - pro
Page 91 and 92: Processes Running 1 Blocked 4 3 2 R
Page 93 and 94: Processes Device I/O … the differ
Page 95 and 96: Processes Interrupts and device I/
Page 97 and 98: Processes InterProcess Communicatio
Page 99 and 100: Processes Process A Spooler directo
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Processes Process A Process B Print
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Processes InterProcess Communicatio
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Processes /* process 0 */ main () {
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while (turn == process && intereste
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while (turn == process && intereste
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Processes void consumer(void) { int
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Processes #include “prototypes.h
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Processes void consumer(void) { int
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Processes void writer(void) { while
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Processes Process Scheduling - Crit
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Processes Process Scheduling - Roun
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Processes Process Scheduling - Prio
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Processes Process Scheduling - ‘S
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Processes Process Scheduling - Two
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Memory Management The part of the o
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Memory Management Memory management
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Memory Management Swapping - memory
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Memory Management Virtual Memory -
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Memory Management Disk Page 1 Proce
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Memory Management Disk Page 1 Proce
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Memory Management Virtual Address S
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Memory Management Second-level page
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Memory Management Segmentation - Th
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Memory Management Segmentation - To
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Memory Management Segmentation » O
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Memory Management Segmentation - It
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Operating Systems - David Vernon

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