Computer Memory

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.

Magnetic disks offer faster access times compared to magnetic tape due to their random access nature, allowing for quicker data retrieval. Additionally, magnetic disks provide higher data transfer rates, making them more suitable for applications requiring rapid data processing. Furthermore, magnetic disks have a lower susceptibility to physical damage and data loss compared to magnetic tape, making them a more reliable storage medium for critical data.

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.

A kilobyte (KB) is equal to 1,024 bytes. A megabyte (MB) is 1,024 kilobytes. So there are 1,024 KB * 256 = 262,144 KB in 256 MB

When a computer is first powered up it runs a "Power On Self Test" (POST). Many people call it a "POST test", but of course, that's redundant.

The POST runs through some basic systems, verifying that the computer is capable, at a very basic level, of running.

3 short beeps means that you have a problem with RAM.

RAM is VERY static sensitive. Your friend could have subjected the RAM to static electrical charges and not even known that he/she was doing it.

Remove the memory, put it in a static free container and take it to your local computer geek shop and have it tested. I'll include a link to a web site that lists the "Beep codes" and their meaning. http://www.computerhope.com/beep.htm

Operating system must be loaded first so that other applications and programs will be able to work.

1GB of DDR2 is definitely better. DDR3 is only a teeny tiny bit faster RAM. You'd barely

be able to tell in a benchmark test.

But to have double the amount, that's a huge difference.

DMA , IRQ and I/O address

DDR3 SDRAM stands for double data rate type three synchronous dynamic random access memory. It is used at the tempory memory a computer needs to operate. It is a faster version of the DDR2 RAM.

The meaning behind keyboard parts can regard to subjects. The actual components between the keys, switches and dials are one definition. The other definition depending on context are the number keys, arrows and letter, which indicate keyboard sections.

It depends on the NorthBridge of the motherboard and the socket of the P4. Most intel-processor supported DDR3 Motherboard should be able to run a pentium, but remember that Pentium4 are very slow and DDR3 is still very immature. I recommend you to rather spend more money upgrading your CPU AND MOBO, rather than moving directly to DDR3.

The 'format' command will appear to erase the hard-drive HOWEVER - ALL it does is erase the reference track. The data will still be on the drive (and can be recovered). There are programs that will physically write either random characters or just zeros to every sector of the drive - over-writing all the data that was stored.

1 byte = 8 bits

1 kilobyte (kB) = 1024 bytes

1 megabyte (mB) = 1024 kB

1 gigabyte (gB) = 1024 mB

Basically, the 1024 comes from computers using the binary system

The function of a CD to a computer is read only. A CD is used to view information stored on a computer and easily removed to transport to another location like sneaker netting. A CD-R is for reading and recording data that you do not wish to have saved only to the computer.

The few types of memory includes sensory memory, which deals with sensory information and stores visuals for few seconds. The other is short-term memory which recalls events or things happened over a perod of few seconds to few minutes, and then we have long term memory which deals with info over a larger period of time.

Interesting question. Most agree that shared memory should be minimized and that you should use IPC rather than shared memory if at all possible. Object Oriented programming suggests that an "Object" have it's own methods and that should be the only way that the data object should be modified. Shared memory tends to bypass that construct. In the current programming environment, shared memory is no longer recommended.

Back-side bus(BSB)

800MHz and DDR2 is the assigned DIMM