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In a memory hierarchy system, data and programs are first stored in secondary or auxiliary memory. Program and its related data are brought in main memory for execution. What if the size of Memory needed for Program is more than the size of memory? Virtual memory is a idea used in some large computer systems which allow user to construct programs as though a large memory space were available, equal to total of secondary memory. Every address produced by CPU goes through an address mapping from so-called virtual address to a physical address in main memory. Virtual memory is employed to give programmers the illusion that they have a very large memory at their disposal although computer in fact has a relatively small main memory. A Virtual memory system offers a mechanism for translating program-generated addresses in correct main memory locations. This is done dynamically whereas programs are being executed in CPU. The translation or mapping is handled automatically by hardware through a mapping table.
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Fetching a word from memory: CPU transfers the address of the needed information word to the memory address register (MAR). Address of the needed word is transferred to the pr
Q. Average data transfer rate in floppy? A floppy is about 0.64 mm thick and is available in diameters 5.25 inch and 3.5 inch. Data are arranged in form of tracks and sectors.
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graphical adapters and input methods in computer graphics
8085 the interrupts are classified as Software and Hardware interrupts.
Question: (a) Program instructions and data are brought into memory first, in order to be executed. Explain how the CPU enables an instruction to be executed? (b) Describe
What is load-through or early restart? When a read miss happens for a system with cache the needed word may be sent to the processor as soon as it is read from the main memory
A model for parallel programming is an abstraction in addition its machine architecture is independent. A model is able to be implemented on different hardware and memory architect
This part looks at Berliner's program, two backprop versions by Tesauro and a temporal difference process by Tesauro. This latter program is VERY good quality and has found strateg
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