Operating System Structure
... Secondary-Storage Management • Since RAM is volatile and too small to accommodate all data and programs permanently, the computer system must provide secondary storage to back up main memory • Most modern computer systems use disks (or simulated disks) as the primary storage medium, for both progra ...
... Secondary-Storage Management • Since RAM is volatile and too small to accommodate all data and programs permanently, the computer system must provide secondary storage to back up main memory • Most modern computer systems use disks (or simulated disks) as the primary storage medium, for both progra ...
CMPT 880: Internet Architectures and Protocols
... Resources are shared to create virtual machines CPU scheduling and virtual-memory techniques help to create the illusion that users have their own processors and memory ...
... Resources are shared to create virtual machines CPU scheduling and virtual-memory techniques help to create the illusion that users have their own processors and memory ...
COS 318: Operating Systems Overview Kai Li and Andy Bavier
... Linker and loader say the starting address Allocate/deallocate by library calls such as malloc() and free() Application program use the library calls to manage ...
... Linker and loader say the starting address Allocate/deallocate by library calls such as malloc() and free() Application program use the library calls to manage ...
4 - Operating System Basics.ppt
... Single Tasking • Operating System cannot be able to take control back from the running process/task/application • In case if a process call an I/O Instruction then Processor must wait for I/O instruction to complete before preceding ...
... Single Tasking • Operating System cannot be able to take control back from the running process/task/application • In case if a process call an I/O Instruction then Processor must wait for I/O instruction to complete before preceding ...
Tutorail-two-with
... kept only where it is needed and is accessible only within a defined and restricted area, so any bugs affecting that data must be limited to a specific module or layer. ...
... kept only where it is needed and is accessible only within a defined and restricted area, so any bugs affecting that data must be limited to a specific module or layer. ...
Operating System Structures
... shell waits for process to terminate or continues with user commands ...
... shell waits for process to terminate or continues with user commands ...
Chapter 2: OS Structures
... – Although MS-DOS has some structure, its interfaces and levels of functionality are not well separated ...
... – Although MS-DOS has some structure, its interfaces and levels of functionality are not well separated ...
2.01
... interface cause various actions (provide information, options, execute function, open directory (known as a folder) ...
... interface cause various actions (provide information, options, execute function, open directory (known as a folder) ...
Lecture 2
... starts execution at interrupt vector location for TRAP instruction. • Operating system looks at requested operation and any parameters passed by the application. • Dispatches the correct system call handler through a table of pointers to system call handlers. • Handler completes and (may) return to ...
... starts execution at interrupt vector location for TRAP instruction. • Operating system looks at requested operation and any parameters passed by the application. • Dispatches the correct system call handler through a table of pointers to system call handlers. • Handler completes and (may) return to ...
CH 4 – Review - WordPress.com
... Windows comes in several versions for – home users, business users, home entertainment system users Windows XP successfully merged two customer groups: users of older DOS-based technology and users of Windows NT – True A significant change in windows 7 is the ability to support – multi-touch screen ...
... Windows comes in several versions for – home users, business users, home entertainment system users Windows XP successfully merged two customer groups: users of older DOS-based technology and users of Windows NT – True A significant change in windows 7 is the ability to support – multi-touch screen ...
COS 318: Operating Systems Overview Kai Li Computer Science Department
... Browser, shell, powerpoint, word, … ...
... Browser, shell, powerpoint, word, … ...
Q#1: A _____ is an example of a systems program. Q#2: A
... Q#4: Microkernels use _____ for communication. a) message passing b) shared memory c) system calls d) virtualization Ans: ______A_________ (1pt) Q#5: Which of the following is true: a) Many operating system merge I/O devices and files into a combined file because of the similarity of system calls fo ...
... Q#4: Microkernels use _____ for communication. a) message passing b) shared memory c) system calls d) virtualization Ans: ______A_________ (1pt) Q#5: Which of the following is true: a) Many operating system merge I/O devices and files into a combined file because of the similarity of system calls fo ...
System Call - ShareCourse
... ensure correct and consistent computing Debugging facilities can greatly enhance the user’s and ...
... ensure correct and consistent computing Debugging facilities can greatly enhance the user’s and ...
Lecture 1: Overview - City University of New York
... In a time-sharing system, multiple users simultaneously access the system through terminals, with the OS interleaving the execution of each user program in a short burst or quantum of computation. ...
... In a time-sharing system, multiple users simultaneously access the system through terminals, with the OS interleaving the execution of each user program in a short burst or quantum of computation. ...
File management
... Software platform on which other programs run Provides a connection between application programs and the computer hardware ...
... Software platform on which other programs run Provides a connection between application programs and the computer hardware ...
EIE3311 - PolyU EIE
... 1.5 Serial interface: Asynchronous/synchronous interface, RS232C serial interface and handshaking. 1.6 Direct memory Access and DMA-controlled I/O: Basic DMA operation, DMA controller, shared-bus operation, disk memory systems, video displays. 1.7 Cache memory: mapping, associativity; replacement po ...
... 1.5 Serial interface: Asynchronous/synchronous interface, RS232C serial interface and handshaking. 1.6 Direct memory Access and DMA-controlled I/O: Basic DMA operation, DMA controller, shared-bus operation, disk memory systems, video displays. 1.7 Cache memory: mapping, associativity; replacement po ...
ppt
... ensure correct and consistent computing • Debugging facilities can greatly enhance the user’s and programmer’s abilities to efficiently use the system ...
... ensure correct and consistent computing • Debugging facilities can greatly enhance the user’s and programmer’s abilities to efficiently use the system ...
1. Operating system
... 1. Computer system consists of : • Hardware (monitor, keyboard, case, motherboard, disk drives, etc ) • System Software (operating systems, compilers, etc) ...
... 1. Computer system consists of : • Hardware (monitor, keyboard, case, motherboard, disk drives, etc ) • System Software (operating systems, compilers, etc) ...
The UNIX Operating System - Niagara College Technology
... From a list of employees, find all the engineers, alphabetize, and print the list. ...
... From a list of employees, find all the engineers, alphabetize, and print the list. ...
SECTION 1
... Read-Only Memory (ROM) is used in most computers to hold a small, special piece of software: the 'boot up' program. This software runs when the computer is switched on or 'boots up'. The software checks the computer’s hardware and then loads the operating system. ROM is non-volatile storage. ...
... Read-Only Memory (ROM) is used in most computers to hold a small, special piece of software: the 'boot up' program. This software runs when the computer is switched on or 'boots up'. The software checks the computer’s hardware and then loads the operating system. ROM is non-volatile storage. ...
COS 318: Operating Systems Introduction Kai Li Computer Science Department
... How many procedures does a key stroke invoke? What happens when your application references 0 as a pointer? Real OS is huge and impossible to read everything, but building a small OS will go a long way ...
... How many procedures does a key stroke invoke? What happens when your application references 0 as a pointer? Real OS is huge and impossible to read everything, but building a small OS will go a long way ...
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.