Definition
The Idea Of Direct Memory Access
By providing circuitry to generate addresses and memory control signals independently of the processor we see that it is possible to improve performance considerably. All that is necessary is to provide a signal to tell the processor to remove itself from the bus so there is no contention on the memory control, address, or data lines.

This is the entire concept behind direct memory access (DMA). To complete our picture, it is important to note that there are actually several ways that DMA can be ....etc

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It is a step towards a new breed of computer chips that couple memory with information processing. Such chips retain data when computer is turned off, eliminating the time-consuming process of booting up information from hard drive to processor. If we can make semiconductor based magnetic memories when we turn on computer it would be like a TV set-all information will be there with no need for reloading the operating system. All spintronic computers eliminate the need for parallel processing. Computing could be accelerated and customized with r ....etc

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ABSTRACT
While magnetic and semi-conductor based information storage devices have been in use since the middle 1950â„¢s, todayâ„¢s computers and volumes of information require increasingly more efficient and faster methods of storing data. Among the most promising of the new alternatives are photopolymer-based devices, holographic optical memory storage devices, and protein-based optical memory storage using rhodopsin , photosynthetic reaction centers. This paper focuses mainly on protein-based optical memory storage using the photosen ....etc

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Abstract:
This paper presents a performance analysis approach for OCDMA networks, which takes into account both the physical layer characteristics and random media access schemes. Analysis results demonstrate its effectiveness in characterizing the OCDMA network dynamics. ©2005 Optical Society of America OCIS codes: (060.4250) Networks; (060.4510) Optical communications
1. Introduction
Conventional optical local access networks typically use wavelength-division multiplexing (WDM) and timedivision multiplexing (TDM) techniq ....etc

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Abstract
As the microprocessor speed increases from 500MHz to 1GHz and beyond, the designers must find new ways to make the cache memory for high speed access. Here, the clock to wordline path delay is optimized using a novel circuit
design technique. The delay is optimized by about 2.5 times at worst
case corner. Considering a memory element whose access time is 800ps and read and write operation occurs simultaneously in the same clock cycle, 18% improvement of the overall access time is observed. There is also a pre-decoding and p ....etc

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need material for serial access memory as how it can be accessed like or unlike random access memory and differences betwen the ram and sam(serial access memory) ....etc

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A Phase Change Memory as a Secure Main Memory
A Seminar Report
by
Abdul Nassar A A
M105101
Department of Computer Science & Engineering
College of Engineering Trivandrum
Kerala - 695016
2010-11




Contents
1 Introduction 5
2 PCM Technology 6
2.1 History and background . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Memory cell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Operation . . . . . . . . . . ....etc

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Magnetic Random Access Memory

MRAM is a nonvolatile random access memory which uses magnetic storage and magnetoresistance (MR) to read the stored data. Magnetoresistive material is a resistor made of common ferromagnetic material which will change in resistance in the presence of a magnetic field. The magnetoresistive property gives a small but sufficient signal to distinguish between a 1 and 0. MRAM results from combining MR storage elements with standard semiconductor fabrication processes. ....etc

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pls send me glass computer memory for reduced cost of medical imaging ..abstact and ppt &FULL INFORMATION ....etc

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Name– study of diode matrix ROM.
Aim – to study the process of memory storage and memory address locations.
Apparatus – rectifier diodes, circuit board, DC power supply, resistors, connecting wires, soldering iron, cutter etc.
Circuit diagram –




Brief theory – a read only memory (ROM) can store thousands of binary numbers representing computer instructions and data. Some of the smaller ROMs are also used to implement t ....etc

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