Computer Memory

we can say its a kind of ROM... since flash memory is a specialised EEPROM...

Virtual memory is a method for using and assigning disc drive memory that expands the number of applications able to run at the similar time. Most Computers are made up with 128 or sixty four MB of Random Access Memory (RAM). Virtual memory is a memory windows system that's utilized in the Windows working systems to increase the capacity of the PC's physical memory. Relatively than depend upon actual, physical locations to save computer program info, the applied sciences of virtual ram has the flexibility to assign unused program components to additional imaginary memory addresses, when it's saved on the harddisk.

Ram is defined because the community of built-in electrical circuits kept or kept on PC chips or on another physical storage consoles made obtainable by a variety of applications at different times. Info kept to Ram is just not physical in the identical sense that flash drives or CD's are - as a substitute, Memory is unsystematic within your sense that a pc software tend to be randomly drawn as it is wanted, relatively than recovered by sequence. Ram is momentary in that it's reset in addition to cleared every time you reboot your Computer.

When Laptops are functioning a whole lot of computer programs in addition to computer programs directly, the memory amount that the PC must accomplish all the actions generally outweighs the Ram quantity that the PC has. Creating use of a virtual ram, the PC is intended to acknowledge better memory than the actual, enabling it to run several software programs. That is doable by dividing the memory required and using the desired total of actual memory, enabling the opposite features of the application to rest hidden on the disc drive. The appliance thinks that the whole application is accessible at the same time, when actually only the considered necessary components are utilizing Ram and the remainder is kept on the disk drive.

Know-how of virtual ram tricks the PC into pondering that there is a lot by far the most Ram out there than there's and, as a result of the applications usually do not require all of the Ram obtainable suddenly, the process works to allow numerous giant computer programs to function at the identical time. With out virtual memory we would not be capable of open multiple software programs - like an internet browser and a word processor whereas working the common working system features - without the Ram being upgraded.

Swapping is the trade between virtual memory and Ram memory spaces. Records may perhaps freely transfer between the differing types as it is needed by the application. Since hard disk memory space is far less costly to put in in Pcs, the utilization of virtual ram lowers the value of Computers that may in any other case require far more Memory. Thus, a high powered Computer is able to working several applications concurrently and is widely out there to the general public at an inexpensive price.

Main memory (RAM) and secondary memory (like hard drives or SSDs) are interlinked in that they work together to store and manage data for computing tasks. Main memory is used for temporarily holding data that is actively in use by the CPU, allowing for quick access and processing. In contrast, secondary memory provides long-term data storage, retaining information even when the computer is powered off. Data is transferred between these two types of memory, with the operating system managing this flow to optimize performance and ensure that necessary data is readily available in main memory when needed.

we can do this using two techniques:

here i m assuming that two number which is to be multiplied are given..

say 05H and 04H,

so coz 5*4 = 5+5+5+5 = 20

and 4*5 = 4+4+4+4+4 = 20

use this concept ...

MVI A,05H;

MVI B,04H;

L1:

ADD A;

DCR B;

JNZ : L1;

STA 2004H;

HLTType your answer here...

UDSBXBSH

Petabyte. The endings are Greek.

It is also one million Gigabytes in the USA. We count differently than the UK or the rest of the world, for some reason.

Mega= 1 x 10(6)

Giga= 1 X 10 (7)

Terra= 1 x 10 (8)

Peta= 1x 10 (9)

http://en.wikipedia.org/wiki/Petabyte

A microprocessor that uses 24 bit addressing, such as the Intel 80286, can address 224 or 16,777,216 memory locations. The IBM MainFrame, 360/44 or any modern version running in AMODE=24 also has the same capacity.

Virtual memory, which is much less efficient than physical memory (RAM).

The computer contains:
Hard Drive
RAM (memory)
Processor chip
Graphic chip
Motherboard
mouse+ keyboard
Monitor/Screen


The main section would be the Motherboard and RAM. Computer would not be able to run without it.

Whenever anything is stored in the memory of your computer (RAM) it is stored at a specific place. Each specific place in your memory has its address that can be used to tell computer programs to go to those addresses to perform actions on the object stored at that address.

It is similar to how you have your house number.

DDR

dual ranked dimm. This is incorrect! Single-ranked DIMMs cost more but perform better because the controller accesses all chips at the same time. Dual and quad ranks are a method of reducing the overall price of memory in a system, but at the expense of performance.

You need 20 bits of address bus to address 1 Mb of memory.

"RAM" Random Access Memory.

Once the PC or MAC is rebooted or powered down, all memory stored in the RAM is dumped.

SD Ram is actually SDR SDRAM, and DD Ram is actually DDR SDRAM, though the former does not usually have the SDR in front of it. The letters SDR and DDR stand for Single Data Rate and Double Data Rate, and the letters SDRAM stand for Synchronous Dynamic Random Access Memory. The main difference between SDR and DDR memory is speed. There are a lot of little differences, but the main one (IMHO) that affects the user is speed: DDR can transfer data at roughly twice the speed of SDR. More speedy data rates = better performance. Just remember, the motherboard you are using must include the appropriate chipset to support the different RAM types. They are not interchangeable. SDR SDRAM comes in three main flavors: PC66, PC100 and PC133. Each successive number refers to the bus speed of the RAM in MHz, thus PC66 runs at 66 MHz, PC100 runs at 100 MHz, etc. SDR SDRAM has 168 pins at the connector.

DDR SDRAM has 184 pins at the connector, which is one reason you can't just use DDR instead of SDR, and comes in many different flavors; PC2100 which runs at 266 MHz, PC2700 which runs at 333 MHz, PC3200 which runs at 400 MHz, etc. While the numbers on SDR SDRAM referred to clock speeds, the DDR SDRAM numbers come from the theoretical maximum bandwidth in Megabytes per second (MB/s). Thus, PC2100 has a theoretical maximum bandwidth of 2100 MB/s, but runs at 133 MHz. DDR SDRAM modules are now available from PC1600 all the way up to PC4400, which has a bandwidth of 4400 MB/s and runs at 550 MHz. In order to know which type of RAM you need, you must know what your motherboard supports. I recommend searching the motherboard manufacturer's website for this info, or review sites like tomshardware.com or sharkyextreme.com. Good luck!

Yes they are definitely different as DDR stands for Double Data Ram & SDR stands for Single Data Ram and further explanation can be found here

http://en.wikipedia.org/wiki/DDR_SDRAM

RAM: Random Access Memory

duration of iconic memory for about less than one second whereas duration of Echoic memory for about Three to four second- Nilesh Gunjal ( M.A. Psychology)

Memory in a computer system is divided into segments. The logical size of these segments varies from system to system, and from operating system to operating system. Each of these segments is assigned a unique address, which is called a memory address.

Memory addresses are commonly represented in hexadecimal format on modern computer systems. Generally speaking, many recent 32-bit operating systems, such as Microsoft Windows XP, are able to assign 32-bit memory addresses, which is 2^32 unique addresses, or 4,294,967,295 different memory locations. Each memory address (also known as memory blocks) points to one byte of data (or storage space) within the memory system. Thus, most 32-bit operating systems utilizing 32-bit memory addressing are limited to 4GB of total memory, since memory capacity beyond this has no way to be assigned an address.

Newer 64-bit operating systems, such as Windows 7 x64, that use a 64-bit memory addressing scheme (2^64) are able to address up to 16 exabytes of memory. (Note that this is considered practically unlimited in the terms of current computer memory usages.)

Thus, when a program issues a command for the CPU to recover data or instructions from memory, the CPU will locate the correct data location using the memory address assigned to the requested data. In most modern operating systems, the actual physical assignment of data and / or instructions in memory is controlled by the operating system itself.

In order to take advantage of the Dual Channel option on your motherboard, you will need a matched pair of memory.

If you only install one stick of 512 MB memory, you will have to turn off the Dual Channel capabilities on your motherboard.

If you install a matched pair of 256 MB memory, you can keep Dual Channel enabled.

I would recommend buying at least 2x512 MB if not 2x1 GB of memory. Prices for 2x256 MB may be very expensive compared to 2x1 GB.

The main advantage of magnetic discs over magnetic tape is the speed of access - to access data from a magnetic tape the reels have to be wound or unwound until the correct portion is tape is uncovered

There are 131,072 bytes in one megabite. In order to figure out how many bytes are in 25 megabites you need to multiply 131,072 by 25. Using this equasion you can figure out that 3,276,800 bytes are in 25 megabites.

No. Much, much more than that.

On average one movie is 2GB. That's two gigabytes.

A high definition (HD) movie would be around 3 or 4.5GB

Memory means the RAM of the CPU and when your computer is switched off you can't save any form of data in your memory (RAM). This is because RAM is a place in the CPU's system where data is stored temporarily and it gets removed as soon as you turn off your CPU. (RAM requires a constant voltage to retain information.) So by turning the PC off, all data in the RAM is lost.