Course\FOS\FOS Unit-1 2014
... a government, the OS performs no useful function by itself. It simply provides an environment within which other programs can do useful work. We can view an OS as a resource allocator. A computer system has many resources (hardware & software) that may be required to solve a problem such as: CPU tim ...
... a government, the OS performs no useful function by itself. It simply provides an environment within which other programs can do useful work. We can view an OS as a resource allocator. A computer system has many resources (hardware & software) that may be required to solve a problem such as: CPU tim ...
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 ...
Module 4: Processes
... Takes less time to create a new thread than a process Less time to terminate a thread than a process ...
... Takes less time to create a new thread than a process Less time to terminate a thread than a process ...
Lecture10c,Boot,process
... Using Safe Mode to Start the Computer: Safe mode is a method of starting Windows XP Professional by using only default settings, which include a VGA video driver, a Microsoft mouse driver, and the minimum device drivers necessary to start the computer. When your computer will not start normally, yo ...
... Using Safe Mode to Start the Computer: Safe mode is a method of starting Windows XP Professional by using only default settings, which include a VGA video driver, a Microsoft mouse driver, and the minimum device drivers necessary to start the computer. When your computer will not start normally, yo ...
History of Unix OS - Seneca
... operating system to run “space wars” game. Ken’s philosophy was to create an operating system with commands or “utilities” that would do one thing well (i.e. UNIX). Pipes could be used combine commands... ...
... operating system to run “space wars” game. Ken’s philosophy was to create an operating system with commands or “utilities” that would do one thing well (i.e. UNIX). Pipes could be used combine commands... ...
History of Unix OS
... operating system to run “space travel” game. Ken’s philosophy was to create an operating system with commands or “utilities” that would do one thing well (i.e. UNIX). Pipes could be used combine commands... ...
... operating system to run “space travel” game. Ken’s philosophy was to create an operating system with commands or “utilities” that would do one thing well (i.e. UNIX). Pipes could be used combine commands... ...
Lecture 4
... Below Registered File Types, you will see a long list of extensions like XLS and ZIP (at the end of the list) A file extension tells Windows what type of file it is. Scroll down the list and find the extension for the file type you want to open with a different application. In the lower half of the ...
... Below Registered File Types, you will see a long list of extensions like XLS and ZIP (at the end of the list) A file extension tells Windows what type of file it is. Scroll down the list and find the extension for the file type you want to open with a different application. In the lower half of the ...
Chapter 2: Operating-System Structures
... 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 involves ensuring that all access to system resources is ...
... 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 involves ensuring that all access to system resources is ...
Operating-System Structures
... API for POSIX-based systems (including virtually all versions of UNIX, Linux, and Mac OS X), and Java API for the Java virtual machine (JVM) Why use APIs rather than system calls? ...
... API for POSIX-based systems (including virtually all versions of UNIX, Linux, and Mac OS X), and Java API for the Java virtual machine (JVM) Why use APIs rather than system calls? ...
5. Process and thread scheduling
... 5.2 Scheduling Methods – A Framework for Scheduling – Common Scheduling Algorithms – Comparison of Methods ...
... 5.2 Scheduling Methods – A Framework for Scheduling – Common Scheduling Algorithms – Comparison of Methods ...
Chapter 1: Introduction
... The basic unit of computer storage is the bit. A bit can contain one of two values, 0 and 1. All other storage in a computer is based on collections of bits. Given enough bits, it is amazing how many things a computer can represent: numbers, letters, images, movies, sounds, documents, and programs, ...
... The basic unit of computer storage is the bit. A bit can contain one of two values, 0 and 1. All other storage in a computer is based on collections of bits. Given enough bits, it is amazing how many things a computer can represent: numbers, letters, images, movies, sounds, documents, and programs, ...
Two general strategies for creating multiple threads
... The microkernel also provides more security and reliability, since most services are running as user- rather than kernel- processes. Ex:The Mac OS X kernel (also known as Darwin) is partly based on the Mach microkernel. Unfortunately, the performance of microkernels can suffer due to increased s ...
... The microkernel also provides more security and reliability, since most services are running as user- rather than kernel- processes. Ex:The Mac OS X kernel (also known as Darwin) is partly based on the Mach microkernel. Unfortunately, the performance of microkernels can suffer due to increased s ...
What is an Operating System?
... The basic unit of computer storage is the bit. A bit can contain one of two values, 0 and 1. All other storage in a computer is based on collections of bits. Given enough bits, it is amazing how many things a computer can represent: numbers, letters, images, movies, sounds, documents, and programs, ...
... The basic unit of computer storage is the bit. A bit can contain one of two values, 0 and 1. All other storage in a computer is based on collections of bits. Given enough bits, it is amazing how many things a computer can represent: numbers, letters, images, movies, sounds, documents, and programs, ...
PowerPoint XP
... A base operating system provides services in a very generic way One or more other operating systems live on top of the base system Using the services it provides To offer different views of system to users ...
... A base operating system provides services in a very generic way One or more other operating systems live on top of the base system Using the services it provides To offer different views of system to users ...
What is an Operating System?
... When it has to wait (for I/O for example), OS switches to another job ...
... When it has to wait (for I/O for example), OS switches to another job ...
BIOS Startup Firmware
... Monitoring firmware operating in SMM can provide a system design with a new capability: secure provisioning. The firmware can hold a list of software objects in the OS and application code that are open for updates. Because the firmware has access to system resources such as the network interfaces a ...
... Monitoring firmware operating in SMM can provide a system design with a new capability: secure provisioning. The firmware can hold a list of software objects in the OS and application code that are open for updates. Because the firmware has access to system resources such as the network interfaces a ...
Section for Related Work % \section{Related Work} Rootkit detection
... Gibraltar, another behavior-based kernel inspection rootkit detection tool, detects kernel level rootkits by using an initial training period in which invariants on kernel data structures are created \cite{baliga2008automatic}. Due to the way that Gilbratar monitors the kernel, it must reside on a s ...
... Gibraltar, another behavior-based kernel inspection rootkit detection tool, detects kernel level rootkits by using an initial training period in which invariants on kernel data structures are created \cite{baliga2008automatic}. Due to the way that Gilbratar monitors the kernel, it must reside on a s ...
Set 1
... jobs so frequently that users can interact with each job while it is running, creating interactive computing z ...
... jobs so frequently that users can interact with each job while it is running, creating interactive computing z ...
Chapter 1 - Computing
... • Operating System – Part of computer system (software) – Manages all hardware and software • Controls every file, device, section of main memory and nanosecond of processing time • Controls who can use the system • Controls how system is used Understanding Operating Systems, ...
... • Operating System – Part of computer system (software) – Manages all hardware and software • Controls every file, device, section of main memory and nanosecond of processing time • Controls who can use the system • Controls how system is used Understanding Operating Systems, ...
Chapter 2 Computer System Structure
... Operating system indexes into I/O device table to determine device status and to modify table entry to include interrupt. ...
... Operating system indexes into I/O device table to determine device status and to modify table entry to include interrupt. ...
Chap 01 -Tbook.Ver.9
... The basic unit of computer storage is the bit. A bit can contain one of two values, 0 and 1. All other storage in a computer is based on collections of bits. Given enough bits, it is amazing how many things a computer can represent: numbers, letters, images, movies, sounds, documents, and programs, ...
... The basic unit of computer storage is the bit. A bit can contain one of two values, 0 and 1. All other storage in a computer is based on collections of bits. Given enough bits, it is amazing how many things a computer can represent: numbers, letters, images, movies, sounds, documents, and programs, ...
What is an Operating System?
... own address. It is a repository of quickly accessible data shared by the CPU and I/O devices. ? Main memory is a volatile storage device. It loses its contents in the case of system failure. ? The operating system is responsible for the following activities in connections with memory management: ? K ...
... own address. It is a repository of quickly accessible data shared by the CPU and I/O devices. ? Main memory is a volatile storage device. It loses its contents in the case of system failure. ? The operating system is responsible for the following activities in connections with memory management: ? K ...
Operating System
... After I/O starts, control returns to user program without waiting for I/O completion. System call – request to the operating system to allow user to wait for I/O completion. Device-status table contains entry for each I/O device indicating its type, address, and state. Operating system index ...
... After I/O starts, control returns to user program without waiting for I/O completion. System call – request to the operating system to allow user to wait for I/O completion. Device-status table contains entry for each I/O device indicating its type, address, and state. Operating system index ...
Low-level design features explain why OS/2 Warp, Windows 95
... drivers that provide an interface to peripheral subsystems such as video cards or printers. Windows 3.11 does use VxDs for the file system, providing a protected-mode path to disk. This stripped-down design provides a very small working set, (the application and system code that must be loaded for a ...
... drivers that provide an interface to peripheral subsystems such as video cards or printers. Windows 3.11 does use VxDs for the file system, providing a protected-mode path to disk. This stripped-down design provides a very small working set, (the application and system code that must be loaded for a ...
Unix hardware level
... • The fundament entity in NTFS is a volume. A volume is created by the NT disk administrator utility, and is based on a logical disk partition. The volume may occupy a portion of a disk, may occupy an entire disk, or may span across several disks. In NTFS, all information about the volume are stored ...
... • The fundament entity in NTFS is a volume. A volume is created by the NT disk administrator utility, and is based on a logical disk partition. The volume may occupy a portion of a disk, may occupy an entire disk, or may span across several disks. In NTFS, all information about the volume are stored ...