Components of an operating system
... computer systems are sold with an operating system installed. Computers that are designed for individual users are called Personal Computers (PCs). PC operating systems are designed to control the operations of programs such as Web browsers, word processors, and e-mail programs Computers that are ca ...
... computer systems are sold with an operating system installed. Computers that are designed for individual users are called Personal Computers (PCs). PC operating systems are designed to control the operations of programs such as Web browsers, word processors, and e-mail programs Computers that are ca ...
2.1 Input Output Control System
... enable a user to create files, assign meaningful name and specify how the files to be shared with others users of the system ...
... enable a user to create files, assign meaningful name and specify how the files to be shared with others users of the system ...
Operating Systems Operating System Component and Structure
... device types – encapsulates device-specific knowledge • e.g., how to initialize a device, how to request I/O, how to handle ...
... device types – encapsulates device-specific knowledge • e.g., how to initialize a device, how to request I/O, how to handle ...
Lecture 3 - The College of New Jersey
... protection of system resources since each virtual machine is isolated from all other virtual machines. This isolation, however, permits no direct sharing of resources. A virtual-machine system is a perfect vehicle for operating-systems research and development. System development is done on the vi ...
... protection of system resources since each virtual machine is isolated from all other virtual machines. This isolation, however, permits no direct sharing of resources. A virtual-machine system is a perfect vehicle for operating-systems research and development. System development is done on the vi ...
PPTX
... – File and device I/O are as similar as possible – File and device names have the same syntax and meaning, can pass as arguments to programs – Same protection mechanism as regular files ...
... – File and device I/O are as similar as possible – File and device names have the same syntax and meaning, can pass as arguments to programs – Same protection mechanism as regular files ...
PPTX
... – File and device I/O are as similar as possible – File and device names have the same syntax and meaning, can pass as arguments to programs – Same protection mechanism as regular files ...
... – File and device I/O are as similar as possible – File and device names have the same syntax and meaning, can pass as arguments to programs – Same protection mechanism as regular files ...
PDF
... Layer 2 – communication between OS and console Layer 3 – managed I/O Layer 4 – user programs Layer 5 – the user ...
... Layer 2 – communication between OS and console Layer 3 – managed I/O Layer 4 – user programs Layer 5 – the user ...
Design of MS-DOS
... - Design Principles / Fundamentals - Basis of many other Disk(based) Operating Systems. • The first personal computer DOS, called Personal Computer Disk Operating System, was developed for IBM by Microsoft Corporation. • MS retained the rights to market a Microsoft version, called MS-DOS. PC-DOS and ...
... - Design Principles / Fundamentals - Basis of many other Disk(based) Operating Systems. • The first personal computer DOS, called Personal Computer Disk Operating System, was developed for IBM by Microsoft Corporation. • MS retained the rights to market a Microsoft version, called MS-DOS. PC-DOS and ...
OS Components and Structure
... Secondary storage devices are too crude to use directly for long-term storage. The file system provides logical objects and logical operations on those objects. A file is the basic long-term storage entity: a file is a named collection of persistent information that can be read or written. The file ...
... Secondary storage devices are too crude to use directly for long-term storage. The file system provides logical objects and logical operations on those objects. A file is the basic long-term storage entity: a file is a named collection of persistent information that can be read or written. The file ...
Operating System
... operating-systems research and development. System development is done on the virtual machine, instead of on a physical machine and so does not disrupt normal system operation. The virtual machine concept is difficult to implement due to the effort required to provide an exact duplicate to the und ...
... operating-systems research and development. System development is done on the virtual machine, instead of on a physical machine and so does not disrupt normal system operation. The virtual machine concept is difficult to implement due to the effort required to provide an exact duplicate to the und ...
Lecture slides
... • Identifier: A unique integer associated with a process • State : A currently executing process is in running state • Priority : Priority level relative to other processes • Program counter : Address of the next instruction of the program to be executed. • Memory pointers: pointers to the program c ...
... • Identifier: A unique integer associated with a process • State : A currently executing process is in running state • Priority : Priority level relative to other processes • Program counter : Address of the next instruction of the program to be executed. • Memory pointers: pointers to the program c ...
The Evolution of OS
... – 1st Batch system by General Motor (GM) at the mid 50’s on an IBM 701 – to reduce the time wasted by scheduling and setup time – the use of monitor Interrupt Processing – monitor loads programs one after another in a batch – two parts (Figure 2.3) Device • resident monitor Drivers Monitor • user pr ...
... – 1st Batch system by General Motor (GM) at the mid 50’s on an IBM 701 – to reduce the time wasted by scheduling and setup time – the use of monitor Interrupt Processing – monitor loads programs one after another in a batch – two parts (Figure 2.3) Device • resident monitor Drivers Monitor • user pr ...
Introduction to operating systems
... A consistent interface between the user and the operating system. ...
... A consistent interface between the user and the operating system. ...
Introduction To Operating Systems
... A user program can’t use arbitrary amount of memory. A user program can’t access data belonging to the operating system or other user programs. • How to achieve memory protection? Indirect memory access: memory access with a virtual address which needs to be translated into physical address. ...
... A user program can’t use arbitrary amount of memory. A user program can’t access data belonging to the operating system or other user programs. • How to achieve memory protection? Indirect memory access: memory access with a virtual address which needs to be translated into physical address. ...
OSTEP Chapter 2 - eecis.udel.edu
... • In order to allow users to tell OS what to do and thus make use of the features of VM (e.g., running programs, allocating memory, accessing files), OS provides interfaces (APIs) that can be called – system calls and standard library ...
... • In order to allow users to tell OS what to do and thus make use of the features of VM (e.g., running programs, allocating memory, accessing files), OS provides interfaces (APIs) that can be called – system calls and standard library ...
Operating System - Linux - Home Pages of People@DU
... system starts and runs till the session gets terminated Different from BIOS which is hardware dependent. Kernel is software dependent ...
... system starts and runs till the session gets terminated Different from BIOS which is hardware dependent. Kernel is software dependent ...
What is an operating system?
... Is more complex compared to a simple OS Must hide the sharing of resources between different users Must hide details of storage and I/O devices Requires a complex file system for secondary storage ...
... Is more complex compared to a simple OS Must hide the sharing of resources between different users Must hide details of storage and I/O devices Requires a complex file system for secondary storage ...
Document
... The “multithreading” operating systems enable programmers to design programs that can be run separated in different threads of execution in a concurrential manner. ...
... The “multithreading” operating systems enable programmers to design programs that can be run separated in different threads of execution in a concurrential manner. ...
Operating Systems (OS)
... distinct resources can be shared effectively the programmer can use system resources easily [user provided with a virtual machine] ...
... distinct resources can be shared effectively the programmer can use system resources easily [user provided with a virtual machine] ...
Memory Management
... Decide how much memory space to allocate each process Decide when a process should be removed from memory ...
... Decide how much memory space to allocate each process Decide when a process should be removed from memory ...
Ch2 OS Structures 1
... – Communications – Processes may exchange information, on the same computer or between computers over a network • via shared memory or through message passing (packets moved by the OS) – Error detection – OS needs to be constantly aware of possible errors • May occur in the CPU and memory hardware ...
... – Communications – Processes may exchange information, on the same computer or between computers over a network • via shared memory or through message passing (packets moved by the OS) – Error detection – OS needs to be constantly aware of possible errors • May occur in the CPU and memory hardware ...
Functions of the operating systems
... Input and output: allows computer to display and get data from the I/O devices to interact with users. 2. Memory and secondary storage management: 1. allows the user to organize their data on secondary storage into files & folders 2. also manages the use of main memory by splitting main memory into ...
... Input and output: allows computer to display and get data from the I/O devices to interact with users. 2. Memory and secondary storage management: 1. allows the user to organize their data on secondary storage into files & folders 2. also manages the use of main memory by splitting main memory into ...
tutorial-02-with
... Q 11) List five services provided by an operating system, and explain how each creates convenience for users. In which cases would it be impossible for user-level programs to provide these services? Explain your answer. The five services are: a) Program execution. The operating system loads the cont ...
... Q 11) List five services provided by an operating system, and explain how each creates convenience for users. In which cases would it be impossible for user-level programs to provide these services? Explain your answer. The five services are: a) Program execution. The operating system loads the cont ...
document
... – A user logged on to a “logged-out” terminal by entering their user number and password. User numbers consisted of two parts a “project #” , “programmer #”. This is similar to Unix’s group id/user id. This allowed for file sharing within groups. – As with RT11- files were written and retrieved in b ...
... – A user logged on to a “logged-out” terminal by entering their user number and password. User numbers consisted of two parts a “project #” , “programmer #”. This is similar to Unix’s group id/user id. This allowed for file sharing within groups. – As with RT11- files were written and retrieved in b ...