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Implementing Protection with Virtual Memory - computer architecture:
To enable the operating system to implement protection in the VM system, the HW have to:
I. Support at least 2 modes that denoted whether the running process is a user process (executive process) or an operating system process (kernel/supervisor process).
II. Provide a part ion of the CPU state that a user process may read but not write (includes supervisor mode bit).
o Only operating system process may change page tables. Page tables are held in operating system address space thereby preventing a user procedure from changing them.
o When processes desire to share information in a restricted way, the OS have to assist them.
o The write access bit (in both the TLB and the page table) can be used to limit the sharing to only read sharing.
RAM parity checking is the storing of a redundant parity bit showing the parity odd or even of a small amount of computer data typically one byte stored in random access memory, an
DOM is the Document Object Model (DOM) which is an interface specification handled by the W3C DOM Workgroup that explains an application independent mechanism to access, parse, or
Q. Total number of registers in a CPU? Factors to consider when choosing total number of registers in a CPU are: CPU can access registers faster than it can access m
LCDs are the screens of choice for lightweight screens andportable computers. They consume very little electricity and have advanced technically to quite good resolutions and colou
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Discuss scales and sludge
Write short notes on Event Model.
What are the factors determine the control signals? Contents of the control step counter Contents of the instruction register Contents of the condition code flag
What is a FIFO? FIFO is otherwise known as 'named pipes'. FIFO (first-in-first-out) is a particular file which is said to be data transient. Once data is read from named pipe,
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