2.01
... Protection and security - The owners of information stored in a multiuser or networked computer system may want to control use of that information, concurrent processes should not interfere with each other ...
... Protection and security - The owners of information stored in a multiuser or networked computer system may want to control use of that information, concurrent processes should not interfere with each other ...
slides.01.pdf
... Idea: If storage devices can contain a file system, this means they can store bytes. Couldn’t we just read, say, the kth byte from a device regardless of the file system it contains? Model: Represent real storage devices through special files: ...
... Idea: If storage devices can contain a file system, this means they can store bytes. Couldn’t we just read, say, the kth byte from a device regardless of the file system it contains? Model: Represent real storage devices through special files: ...
2.01 - Faculty of Computer Science and Information Technology
... Debugging facilities can greatly enhance the user’s and programmer’s abilities to efficiently use the system ...
... Debugging facilities can greatly enhance the user’s and programmer’s abilities to efficiently use the system ...
CHAPTER 1: Computer Systems
... Startup files – OS configuration, user preferences Features of Command Languages Can accept input from the user and can output messages to I/O devices Provide ability to create and manipulate variables Include the ability to branch and loop Ability to specify arguments to the program com ...
... Startup files – OS configuration, user preferences Features of Command Languages Can accept input from the user and can output messages to I/O devices Provide ability to create and manipulate variables Include the ability to branch and loop Ability to specify arguments to the program com ...
CHAPTER 1: Computer Systems
... Startup files – OS configuration, user preferences Features of Command Languages Can accept input from the user and can output messages to I/O devices Provide ability to create and manipulate variables Include the ability to branch and loop Ability to specify arguments to the program com ...
... Startup files – OS configuration, user preferences Features of Command Languages Can accept input from the user and can output messages to I/O devices Provide ability to create and manipulate variables Include the ability to branch and loop Ability to specify arguments to the program com ...
Chapter One
... resources and provides the base upon which application programs can be used or written A server-based network is centralized where security and maintenance are handled by the system administrator and all systems rely on the server; a peer-to-peer network is decentralized where security and maintenan ...
... resources and provides the base upon which application programs can be used or written A server-based network is centralized where security and maintenance are handled by the system administrator and all systems rely on the server; a peer-to-peer network is decentralized where security and maintenan ...
Slides
... logical conclusion. It treats hardware and the operating system kernel as though they were all hardware A virtual machine provides an interface identical to the underlying bare hardware The operating system host creates the illusion that a process has its own processor and (virtual memory) Each gues ...
... logical conclusion. It treats hardware and the operating system kernel as though they were all hardware A virtual machine provides an interface identical to the underlying bare hardware The operating system host creates the illusion that a process has its own processor and (virtual memory) Each gues ...
View - LAD
... CPU moves data from/to main memory to/from local buffers I/O is from the device to local buffer of controller. Device controller informs CPU that it has finished its operation by causing an interrupt. ...
... CPU moves data from/to main memory to/from local buffers I/O is from the device to local buffer of controller. Device controller informs CPU that it has finished its operation by causing an interrupt. ...
Lec1 Intro
... modify and distribute Linux OS (as long as they distribute source code of Linux Kernel) “Competition among Hackers” allow code to be improved and distributed often Many users can spot bugs in the operating system or application if source code is “open” ...
... modify and distribute Linux OS (as long as they distribute source code of Linux Kernel) “Competition among Hackers” allow code to be improved and distributed often Many users can spot bugs in the operating system or application if source code is “open” ...
L03 - UMBC
... Paths allow us to give the same name to different files located in different directories. Each running program has a current directory and all filenames are implicitly assumed to start with the name of that directory unless they begin with a slash. ...
... Paths allow us to give the same name to different files located in different directories. Each running program has a current directory and all filenames are implicitly assumed to start with the name of that directory unless they begin with a slash. ...
Lecture 15
... – Linux/Unix: scheduler is the only thing available. The interrupt code will wakeup() the thread that is awaiting service. Some drivers will be able to start next request at this time. – Windows: scheduler is available but also means for enqueueing DPC/APC (Deferred Procedure Call/Asynchronous Proce ...
... – Linux/Unix: scheduler is the only thing available. The interrupt code will wakeup() the thread that is awaiting service. Some drivers will be able to start next request at this time. – Windows: scheduler is available but also means for enqueueing DPC/APC (Deferred Procedure Call/Asynchronous Proce ...
What is Operating System, Kernel and Types of kernels
... This architecture majorly caters to the problem of ever growing size of kernel code which we could not control in the monolithic approach. This architecture allows some basic services like device driver management, protocol stack, file system etc to run in user space. This reduces the kernel code si ...
... This architecture majorly caters to the problem of ever growing size of kernel code which we could not control in the monolithic approach. This architecture allows some basic services like device driver management, protocol stack, file system etc to run in user space. This reduces the kernel code si ...
![Operating Systems [OS]](http://s1.studyres.com/store/data/003405497_1-fcdfdf12ca283ac50da021c971edcf1f-300x300.png)
Ch 1 Getting Started with the Operating System
... Many computer system configurations. One hard disk drive, one CD-ROM drive, and one floppy disk drive. One hard disk drive, one CD-ROM drive, one floppy disk drive, and one Zip drive. Two hard disk drives, one CD-ROM Carolyn Z. Gillay, Bette A. Peat, Windows XP Command Line ...
... Many computer system configurations. One hard disk drive, one CD-ROM drive, and one floppy disk drive. One hard disk drive, one CD-ROM drive, one floppy disk drive, and one Zip drive. Two hard disk drives, one CD-ROM Carolyn Z. Gillay, Bette A. Peat, Windows XP Command Line ...
PPT
... Debugging facilities can greatly enhance the user’s and programmer’s abilities to efficiently use the system ...
... Debugging facilities can greatly enhance the user’s and programmer’s abilities to efficiently use the system ...
Chapter 2
... A mechanism for achieving coordination between concurrently operating units of a computer system, and for responding to specific conditions within a processor. A transfer of flow of control that is forced by the hardware. Trap - a software generated interrupt caused either by an error, or by a user ...
... A mechanism for achieving coordination between concurrently operating units of a computer system, and for responding to specific conditions within a processor. A transfer of flow of control that is forced by the hardware. Trap - a software generated interrupt caused either by an error, or by a user ...
1.1 What is an Operating System?
... controller informs the CPU that it has finished its operation. It accomplishes this communication by causing an interrupt. When the CPU is interrupted, it stops what it is doing and transfers execution to a fixed location. The fixed location usually contains the starting address where the service ro ...
... controller informs the CPU that it has finished its operation. It accomplishes this communication by causing an interrupt. When the CPU is interrupted, it stops what it is doing and transfers execution to a fixed location. The fixed location usually contains the starting address where the service ro ...
What is an Operating System?
... One purpose of OS is to hide peculiarities of hardware devices from the ...
... One purpose of OS is to hide peculiarities of hardware devices from the ...
OPERATING SYSTEMS STRUCTURES
... Remember that memory hierarchy? How to make the best use of the fast and expensive storage. ...
... Remember that memory hierarchy? How to make the best use of the fast and expensive storage. ...
Solaris Operating Systems
... User Names Each user account must be assigned a name. This name is used to identify the account for purposes such as electronic mail and logging into a machine Male it easy for people to recognize a user’s account name when sending e-mail, transferring files, and so on. ...
... User Names Each user account must be assigned a name. This name is used to identify the account for purposes such as electronic mail and logging into a machine Male it easy for people to recognize a user’s account name when sending e-mail, transferring files, and so on. ...
Processes and Threads
... Assign each PCB the same base/size registers Also copy I/O resources, etc. ...
... Assign each PCB the same base/size registers Also copy I/O resources, etc. ...
An Introduction to MS-DOS
... The original Expanded Memory specification (EMS) was designed to provide a uniform means for applications running on 8086/8088 personal computers or 80286/80386- based computers in real mode, to circumvent the 1MB limit on conventional memory, thus providing such programs with very larger amounts of ...
... The original Expanded Memory specification (EMS) was designed to provide a uniform means for applications running on 8086/8088 personal computers or 80286/80386- based computers in real mode, to circumvent the 1MB limit on conventional memory, thus providing such programs with very larger amounts of ...
unit1
... For Example , if user submits a program(Fortran) with data cards and job control instructions denoted by $ at the beginning. If following tasks are done for specific card has been read $FTN card load Fortran complier from its tape. Compiler transfer Source Code to the Object Code and store i ...
... For Example , if user submits a program(Fortran) with data cards and job control instructions denoted by $ at the beginning. If following tasks are done for specific card has been read $FTN card load Fortran complier from its tape. Compiler transfer Source Code to the Object Code and store i ...
The concept of operating system
... memory and to run that program, end execution, either normally or abnormally (indicating error) I/O operations - A running program may require I/O, which may involve a file or an I/O device. File-system manipulation - The file system is of particular interest. Obviously, programs need to read an ...
... memory and to run that program, end execution, either normally or abnormally (indicating error) I/O operations - A running program may require I/O, which may involve a file or an I/O device. File-system manipulation - The file system is of particular interest. Obviously, programs need to read an ...
Acorn MOS
Acorn's Machine Operating System (MOS) or OS was a computer operating system used in the Acorn BBC computer range. It included support for four-channel sound and graphics, file system abstraction, and digital and analogue I/O including a daisy-chained fast expansion bus. The implementation was single-tasking, monolithic and non-reentrant.Versions 0.10 to 1.20 were used on the BBC Micro, version 1.00 on the Electron, version 2 was used on the B+, and versions 3 to 5 were used in the BBC Master Series range.The final BBC computer, the BBC A3000, was 32-bit and ran RISC OS. Its operating system used portions of the Acorn MOS architecture and shared a number of characteristics (commands, VDU system) with the earlier 8-bit MOS.Versions 0 and 1 of the MOS were 16KiB in size, written in 6502 machine code, and held in ROM on the motherboard. The upper quarter of the 16-bit address space (0xC000 to 0xFFFF) is reserved for its ROM code and I/O space.Versions 2 to 5 were still restricted to a 16KiB address space but managed to hold more code and hence more complex routines, partly because of the alternative 65C102 CPU with its denser instruction set plus the careful use of paging.