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Common Functions of Interrupts?
->Interrupt transfers control to the interrupt service routine generally, through the interrupt vector, which contains the addresses of all the service routines.->Interrupt architecture must save the address of the interrupted instruction.->Incoming interrupts are disabled while another interrupt is being processed to prevent a lost interrupt.->A...
rakesh trichy
- Oct 12th, 2008
8051:InterruptNumber Description Address0 EXTERNAL INT 0 0003h1 TIMER/COUNTER 0 000Bh2 EXTERNAL INT 1 0013h3 TIMER/COUNTER 1 001Bh4 SERIAL PORT 0023heg program..unsigned int interruptcnt;unsigned cha...
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Difference between Primary storage and secondary storage?
Main memory: – only large storage media that the CPU can access directly.Secondary storage: – extension of main memory that provides large nonvolatile storage capacity.
rakesh trichy
- Oct 12th, 2008
Primary is were the operating system and other files are stored which is usually the hard drive. Secondary is a second hard drive or a CD/DVD ROM or 3 1/4 inch floppy drive or any other type of devic...
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While running DOS on a PC, which command would be used to duplicate the entire diskette?
diskcopy Java Thread States
Sandhya.Kishan
- Apr 23rd, 2012
Diskcopy command is used to duplicate the diskette,while running DOS on PC.
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What is CPU Scheduler?
->Selects from among the processes in memory that are ready to execute, and allocates the CPU to one of them.->CPU scheduling decisions may take place when a process:1.Switches from running to waiting state.2.Switches from running to ready state.3.Switches from waiting to ready.4.Terminates.->Scheduling under 1 and 4 is nonpreemptive.->All other scheduling is preemptive.
rakesh trichy
- Oct 12th, 2008
Disk schedulers in current operating systems are generally work-conserving, i.e., they schedule a request as soon as the previous request has finished. Such schedulers often require multiple outstandi...
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What is Memory-Management Unit (MMU)?
->Hardware device that maps virtual to physical address.In MMU scheme, the value in the relocation register is added to every address generated by a user process at the time it is sent to memory.->The user program deals with logical addresses; it never sees the real physical addresses.
rakesh trichy
- Oct 12th, 2008
A memory management unit (MMU), sometimes called paged memory management unit (PMMU), is a computer hardware component responsible for handling accesses to memory requested by the central processing u...
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Define Demand Paging, Page fault interrupt, and Trashing?
Demand Paging: Demand paging is the paging policy that a page is not read into memory until it is requested, that is, until there is a page fault on the page. Page fault interrupt: A page fault interrupt occurs when a memory reference is made to a page that is not in memory.The present bit in the page table entry will be found to be off by the virtual memory hardware and it will signal an interrupt. Trashing:...
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Root Directory
The root directory of disk should be placed 1. at a fixed address in main memory 2. at a fixed location on disk 3. anywhere on the disk 4. at a fixed location on the system disk
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List of CPU Scheduling algorithms implemented in Windows Operating System
Hi As we all Know that the OS use various CPU Scheduling algorithm's. I would like to know what Algorithms are used in various OS(Specially in Windows OS) and the purpose.Thank You Julie
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Briefly explain about the differences between the concepts that are involved in Windows and UNIX operating system?
rakesh trichy
- Oct 11th, 2008
Unix is more flexible and can be installed on many different types of machines, including main-frame computers, supercomputers and micro-computers.- Unix is more stable and does not go down as often ...
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What is the mail process from source to destination ?
rakesh trichy
- Oct 11th, 2008
Destination data indicating destinations to which messages are to be transmitted are prestored in thestorage device so that an operator need not input destination data fortransmission of every message...
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How to configure a RAS
prasad.khalatkar
- Mar 4th, 2008
RAS Remote Access Service Can Be Configure Through Routing and Remote Access Services Of Windows 2000,2003 User Can Be Authenticate By RADIUS.
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When a user clicks a particular file or an .exe file on a computer, what process does the system go through before the actual file is loaded onto the desktop?
thukral.rahul
- Jan 12th, 2010
When a user executes a file , the process is directly loaded into the memory . Genearly some OS has a Long term scheduler which moves the processes from the waiting queue to the ready queue(in memory)...
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How chkdsk command works?
freakzilla007
- Jul 23rd, 2007
Checkdisk is a command in DOS and Microsoft Windows systems which verifies a hard disk or a floppy disk for file system integrity. It is similar to the fsck command in Unix. By default, CHKDSK neithe...
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What is superscop?
prasad.khalatkar
- Mar 4th, 2008
A superscope is an administrative feature of DHCP servers running Windows Server 2003 that you can create and manage through the DHCP console. Using a superscope, you can group multiple scopes as...
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How does virus affects computer ?
Explain about Unix and Windows Virus details
poornimay
- May 22nd, 2008
Due to Malicious site visitdownload of MP3, GamesDownloading Screen SaversThrough networkthrough Floppyand many more........
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Assembler, Loader, Linker
What is the logic of the conversion of a source code of a program into its object code? What has the loader and linker's function after that?
mrjhajee
- Nov 14th, 2008
Assembler is type of assembly language which?is used? in?CPU?scheduling?and has coding. Loader is a type of booting?which loads system file to the? Window?O.S i.e. boot loader. Linker?is?linked between compiler and system file.
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